Some assemblages of planktonie foraminifera from the Eocene of the Magura Series (Polish Flysch Carpathians)

R O C Z N I K P O L S K I E G O T O W A R Z Y S T W A G E O L O G I C Z N E G O A N N A L E S D E L A S O C l E T f i G E O L O G I Q U E D E P O L O G N E

T o m ( V o l u m e ) X X X I X — 1969 Z e s z y t ( F a s c i c u l e ) 1—3 K r a k ó w 1969

A N T O N IN A JED N O R O W SK A *

SOME ASSEMBLAGES OF PLANKTONIC FORAMINIFERA FROM THE EOCENE OF THE MAGURA SERIES

(POLISH FLYSCH CARPATHIANS)

(PI. L IV — LVI, 2 Figs.)

Niektóre zespoły otwornic planktonicznych eocenu jednostki magurskiej (polskie Karpo,ty fliszowe)

(PI. L I V — LVI, 2 fig.)

A b s t r a c t : A ssem b la g es o f p la n k to n ie F o ra m in ifera occur sp o ra d ica lly in E o cen e beds of the M agura series. In d ex sp ecies o f the M id dle E ocene, U pper E ocen e and E o c e n e -O lig o c e n e b oun dary are p r e sen t in th e se assem b lages.

IN T R O D U C TIO N

Numerous assem blages of Foraminifera consisting exclu sively of benthic, m ostly arenaceous species, occur frequently in the Eocene beds of the Magura series. The arenaceous species are accompanied by rare benthic species with calcareous test. Assem blages of planktonie Fora­

m inifera are extrem ely rare in these beds, and hitherto no constant zones of their occurrence were found.

The occurrence of planktonie microfauna w as found at several loca­

lities during recent investigations. This m icrofauna represents three different zones of the Eocene: the Middle Eocene zone w ith mass occurrence of Acarinina crassaformis (S u b b o t i n a), the Upper Eocene Zone w ith Globorotalia cocoaensis C u s h m a n and Globigerinoides ind ex F i n l a y , and the Uppermost Eocene — Lower O ligocene zone w ith Globigerina officinalis S u b b o t i n a and Globigerina ampliaper- tura B o 11 i. These three assem blages containing w idely known planktonie index species determ ine the area of the discussed beds much better than the long-lived assem blages of arenaceous Foraminifera.

FORM ER IN V E ST IG A T IO N S

The oldest zone of planktonie Foraminifera known from the Magura series represents the lower Middle Eocene, as indicated b y their index species. Three such assem blages are known of this zone.

The two assem blages found in the Eocene beds of the Beskid Niski range (A. J e d n o r o w s k a , S. W ę c ł a w i k , 1965) are described in

* A d dress: Dr A n to n in a J ed n orow sk a, L ab oratory of G eology, P o lish A ca d em y of S cien ces K rak ow , S en a ck a 3, P oland.

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detail in the present paper. The third assemblage was noted recently from the outer region of the Magura tectonic unit (A. J e d n o r o w s k a , 1968), and the quoted paper contains also descriptions of the species Globigerina inaequispira S u b b o t i n a , Acarinina crassaformis (S u b- b o t i n a) and Acarinina pentacamerata ( S u b b o t i n a ) .

Upper Eocene planktonie Foraminifera are much more frequently found in the Magura series. They were noted from the Gorlice and Grybów area (J. B 1 a i c h e r, 1958, 1962, il 963; J. B 1 a i c h e r, W. S i ­ k o r a , 1963). The planktonie microfauna was found in the upper part of the Variegated Shales and in the Magura Beds.

Upper Eocene zone of planktonie Foraminifera was also found in the Babia Góra region, in the upper part of the Hieroglyphic Beds (J. B 1 a i- c h e r, 1961), and in the Sub-Magura Beds and the Magura Beds (J.

B 1 a i c h e r, 1961; A. J e d n o r o w s k a , 1966; F. B i e d a et all., 1967;

S. G e r o c h et all., 1967).

Besides these assem blages w ith numerous planktonie species a few species of planktonie Foraminifera were noted in assem blages consisting chiefly of arenaceous forms. The presence of specim ens of Acarinina crassaformis ( S u b b o t i n a ) and Acarinina pentacamerata (S u b b o t i- n a) was noted in a Lower Eocene assem blage of arenaceous Foraminifera in the Beloveza Beds in the profile of Zubrzyca Dolna in the Babia Góra region (A. J e d n o r o w s k a , 1966; F. B i e d a et all., 1967). In the same region single specim ens of Upper Eocene planktonie species were recorded in the Magura Beds at Jabłonka and Orawka (A. J e d n o r o w s k a , 1966;

F. B i e d a et all., 1967). Planktonie Foraminifera w ere also noted in the Supra-Magura Beds of the Babia Góra region (A. J e d n o r o w s k a ,

1966; F. B i e d a et all., 1967; S. G e r o c h et all., 1967). Although rare, the stratigraphically im portant species of the genus Globigerina are precious index fossils in the poor assem blage of these Beds.

SELECTED A S SE M B L A G E S OF PL A N K T O N IC FO R A M IN IF E R A

Because of the great stratigraphic value of the assem blages of planktonie Foraminifera the localities of recent findings are briefly re- described (Fig. 1).

The Middle Eocene assem blage was found in the low er part of the Beloveza Beds exposed in the vicin ity of the Ropki village in the Beskid Niski range. The second one was found in the Lower Variegated Shales in the neighbourhood, of the Hańczowa village, aslo in the Beskid Niski.

The third assem blage of the same age was found in the upper part of the Variegated Shales in the vicinity of Rabka.

Assem blages of planktonie Foraminifera w ith index species of the Upper Eocene w'ere found in the Sub-Magura Beds at Zembrzyce in the Babia Góra region, and in the Magura Beds at Zabełcze near N ow y Sącz.

Assem blage w ith rare sm all Globigerina indicating an Eocene — Oli- gocene boundary was found in the Supra-Magura Beds at Budzów, in the Babia Góra region.

Position of the assemblage of planktonie Foraminifera from the Ropki village (Beskid Niski range)

The discussed region lies south-east of Gorlice, in the Racza-Gorlice unit of the Magura nappe (A. J e d n o r o w s k a , S . W ę c ł a w i k , 1965).

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The profile of the Eocene begins here w ith Variegated Shales w ith a preponderance of red shales. The shales are overlain by bipartite Beloveza Beds, which are covered by the Magura Beds (Fig. 2).

The red shales contain an assem blage of microfauna characterized by mass occurrence of Glomospira charoides ( J o n e s et P a r k e r ) and Glcmospira gordialis ( J i o n e s et P a r k e r ) , accompanied by single specim ens of Hormosina ovu lum gigantea G e r o c h, Nodellum velasco- ense ( C u s h m a n ) and more numerous specim ens of Plectina lenis ( G r z y b o w s k i ) , Plectina coniformis ( G r z y b o w s k i), Lituotuba ver- metiformis ( G r z y b o w s k i ) , Glomospira gorayskii ( G r z y b o w s k i ) , Recurvoides walteri ( G r z y b o w s k i ) , Trochamminoides coronatus ( B r a d y), Cystammina pauciloculata ( B r a d y ) . This is a Lower Eocene assem blage, characteristic for Lower Eocene Beds not only of the Magura unit, but also of other units in the Carpathians (F. B i e d a et all., 1963).

Ca. 20 m above the Lower Eocene Variegated Shales a distinctive com plex of thin-bedded flysch occurs w ithin the low er part of the Beloveza Beds. This com plex 10 m thick consists of yellow ish-green pelitic marls, dark-grey and bluish silstones and fine-grained, thin- -bedded calcareous sandstones which form ca. 20 per cent of the complex.

Within this complex, in the point marked in Fig. 2, occurs a rich assem blage of planktonie Foram inifera accompanied by rare specim ens of arenaceous benthic species. This assem blage contains Acarinina crassa- formis (S u b b o t i n a) which is m arkedly abundant, accompanied by Acarinina triplex S u b b o t i n a , Globigerina inaequispira S u b b o t i- n a, Globigerina jrontosa S u b b o t i n a , and Globigerina linaperta F i n l a y . Single specim ens of the species Globorotalia compressa ( P l u m m e r ) , and Globigerina triloculinoides P l u m m e r , encountered in the described assemblage, as w ell as single abraded specim ens of the genus Globotruncana are considered as reworked. The assem blage of planktonie forms is accompanied by rare specimens of arenaceous benthic species: Trochamminoides coronatus ( B r a d y ) , Haplophragmoides uoal- teri ( G r z y b o w s k i ) , Trochammina variolaria G r z y b o w s k i , Den- dro phrya robusta G r z y b o w s k i , and Plectina lenis G r z y b o w s k i .

Samples taken from the overlying series revealed the presence oi a foram iniferal assemblage characteristic for the Middle Eocene, con­

sisting exclu sively of arenaceous forms, and characterized b y mass occurrence of the species Cyclammina amplectens G r z y b o w s k i .

Position of the assem blage of planktonie Foraminifera in the Hańczowa village (Beskid Niski range)

The beds containing the assem blage of planktonie Foram inifera are exposed in the right bank of the Ropka creek, at a distance of ca. 200 m from the road linking W ysowa and U jście Gorlickie (A. J e d n o r o w - s k a, St. W ę c ł a w i k , 1965). These beds belong to the Eocene Varie­

gated Shales. The low er part of this member consists of greenish-blue m arly shales, and of thin-bedded, fine-grained grey m icaceous sand-

■<--- --- --- F ig. 2. 1 — Sup ra-M agu ra B eds; 2 — M agura B eds; 3 — S u b -M agu ra B eds; 4 — B e lo v e za Beds; 5 — b lu ish -g r e e n sh a les w ith in terca la tio n s of sa n d ston es; 6 — red s h a le s w ith in te r c a la tio n s of sa n d sto n es; 7 — red sh a les w tih in te r c a la tio n s of green sh a les; 8 — occu rren ces of m ic r o fa u n a describ ed in th e tex't, and th eir d ista n ce

from th e b a se of th e M agura B ed s (m etres)

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stones. The middle part consists of alternating red and green shales, and thin-bedded fine-grained green sandstones. The upper part of the series is formed of thin-bedded sandstones and greenish-blue shales, with thin intercalations of red shales (Fig. 2).

The assemblages of planktonie Foraminifera occur in two points in the lower part of the Variegated Shales. The first assemblage was found in a sample of greenish-blue marly shales, the second one in a sample taken from a 5 cm thick layer of red marly shale.

Both these assemblages have a composition similar to that of the assemblage of planktonie Foraminifera from the area of the Ropki village.

They are characterized (PI. LIV, Fig. 1) by the presence of numerous specimens of Acarinina crassaforviis ( S u b b o t i n a ) accompanied by specimens of A.carinina pentacamerata ( S u b b o t i n a ) , Acarinina triplex S u b b o t i n a , Globorotalia aragonensis N u 11 a 1, Globigerina inae- quispira S u b b o t i n a , Globigerina frontosa S u b b o t i n a , Globige­

rina linaperta F i n l a y , Chiloguembelina martini (P i j p e r s). Besides the planktonie species the following benthic Foraminifera with calcareous test are present: Nodosarella advena C u s h m a n et S i e g f u s , Glan- dulina eliptica R e u s s, Anomalinoides granosus (H a n t k e n), Cibicides cf. cushmani N u 11 a 1. Benthic arenaceous forms are represented by:

Rhabdammina linearis B r a d y , Dendrophrya excelsa G r z y b o w s k i , Trochamminoides coronatus ( B r a d y), Ammodiscus angygyrus R e u s s, Glomospira charoides ( J o n e s et P a r k e r ) , Trochamminoides litui- formis ( B r a d y), Lituotuba vermetiformis ( G r z y b o w s k i ) , Reophax splendidus G r z y b o w s k i , Thalmannammina subturbinata ( G r z y ­ b o w s k i ) , Cribrostomoides subglobosus (S a r s), and single specimens of Cyclammina amplectens G r z y b o w s k i .

Position of the assemblage of planktonie Foraminifera from the profile of Rabka

The next assemblage of planktonie Foraminifera was found in the top part of the Variegated Shales exposed in the vicinity of Rabka (Fig. 2). The Variegated Shales consist predominant of red shales and less abundant green shales (H. K o z i k o w s k i , 1956; A. J e d n o r o w - s k a, 1968). The red shales are alternating with rare thin-bedded fine- -grained green sandstones. The green shales consist of green, olive-green and bluish-grey shales, alternating with thin-bedded flaggy sandstones, gray-green or gray in colour. Thick-bedded sandstones of the Ciężkowice sandstone type are present locally.

The upper part of the profile of the Variegated Shales contain a Lower Eocene assemblage composed exclusively of arenaceous Fora­

minifera, with a distinct predominance of Glomospira charoides ( J o n e s et P a r k e r ) and Glomospira gordialis ( J o n e s et P a r k e r ) .

A sample of olive-green marly shales collected in the top part of the profile (Fig. 2), contained an assemblage consisting almost exclusively of Foraminifera w ith calcareous test, including numerous planktonie Globigerinidae and Globorotalidae (PI. LIV, Fig. 2). Numerous specimens of Acarinina crassaformis ( S u b b o t i n a ) are accompanied in this assemblage by specimens of Acarinina pentacamerata ( S u b b o t i n a ) , Globorotalia aragonensis N u 11 a 1, Globigerina inaequispira S u b b o ­ t i n a , Globigerina linaperta F i n l a y and Chiloguembelina wilcoxensis ( C u s h m a n et P o n t o n ) . Calcareous benthic species are represented

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by: Lagena amphora R e u s s , Eponides umbonatus ( R e u s s) and Cibi- cides cushmani N u 11 a 1.

The Variegated Shales are overlain in the described profile 'by the Sub-Magura Beds. Samples collected in the lower part of these Beds contain an assemblage consisting exclusively of arenaceous Foraminifera, with abundant specimens o f Cyclammina amplectens G r z y b o w s k i , indicating a Middle Eocene age.

Position of the assemblage of planktonie Foraminifera from the Sub-Magura Beds at Zembrzyce (Babia Góra region)

The samples of the Sub-Magura Beds containing the assemblage of planktonie Foraminifera were collected in the profile of Zembrzyce- -Pilchówka, situated in the marginal part of the Babia Góra region (Fig. 2). The Sub-Magura Beds exposed in the stream-bed o f the creek flowing from Pilchówka and joining the Pałeczka River at Zembrzyce, are underlain by Variegated Shales (M. K s i ą ż k i e w i c z 1966; F. B i e- d a et all., '1967).

The Sub-Magura Beds exposed in the lower part of the stream valley, consist of thin-bedded sandstones (bed thickness ranges from 10 to 20 cm) alternating with greenish and 'brown marls which form beds 2— 3 m thick.

The samples taken in the lower part of the Sub-Magura Beds contain exclusively arenaceous Foraminifera. The large number of specimens of the species Reophax pillulifera B r a d y is characteristic.

The upper part of the Sub-Magura Beds contain a rich assemblage of Foraminifera (Fig. 2) consisting of benthic species with arenaceous and calcareous tests, as w ell as of stratigraphically important planktonie species.

An especially rich assemblage w as found in a sample collected at a distance of c. 120 m from the road curve. The following benthic arenaceous species represented by few specimens were found: Rhab- dammina linearis B r a d y , Dendrophrya excelsa G r z y b o w s k i , Glo­

mospira gorayski ( G r z y b o w s k i ) , Haplophragmoides walteri ( G r z y ­ b o w s k i ) , Haplophragmoides lamella ( G r z y b o w s k i ) , Haplophrag­

moides scitidus ( B r a d y). The calcareous benthic forms are represented by the following species: Stilostomella consobrina (d’O r b i g n y ) , Mar- ginulina subbullo.ta H a n t k e n, Discorbis biapertura ( P o k o r n y ) , Halkyardia radiata var. minima (L i e b u s),Oolina orbignyana (S e g u- e n z a), Nuttalides tr u e m p y i (N u 11 a 1), Globulina gibba d’O r b i g n y, Eponides umbonatus ( R e u s s), Nonionella mauricensis H o w e , Pulle- nia quinqueloba ( R e u s s), Cibicides dampelae B y k o v a et C h r a - m a j a, Cibicides grimsdalei N u 11 a 1, Cibicides rzehaki ( G r z y b ó w - s k i), Gyroidinoides girardanus ( R e u s s), Rotalia lithothamnica U h 1 i g and Planulina jabacoensis B e r m u d e z . The planktonie species (PI.

LVI, Fig. 1) are following: Globorotalia cocoaensis C u s h m a n , Glo­

bigerina corpulenta S u b b o t i n a , Globigerina ampliapertura B o l - 1 i, Globigerina yeguaensis W e i n z i e r l et A p p l i n , Globigerina venezuelana H e d b e r g, Globigerina linaperta F i n l a y , Globigerina cf. eocaena G u e m b e 1, C atapsydrax dissimilis ( C u s h m a n et B e r ­ m u d e z ) , Catapsydrax unicavus B o l l i , L o e b l i c h et T a p p a n , Globigerinoides index F i n l a y , Globigerinatheca cf. barri B r o n n i- m a n n, Globigerapsis cf. kugleri B o l l i , L o e b l i c h et T a p p a n .

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Upper Eocene planktonie index species: Globorotalia cocoaensis, C u s h m a n , Globigerina corpulenta S u b b o t i n a , Turborotalia cen­

tralis C u s h m a n et B e r m u d e z , Globigerinoides index F i n l a y , and Globigerina ampliapertura B o 11 i known from the Upper Eocene and Oligocene, determine the age of the Sub-Magura Beds in the dis­

cussed profile.

Position of the assemblage with planktonie Foraminifera from the Magura Beds at Zabelcze near N ow y Sącz

The assemblage was found in Magura Beds exposed at Zabelcze near Nowy Sącz (Fig. 2). In the lower part of the exposure beds of light-green sandstones of medium thickness are alternating w ith greenish-grey clayey shales a few cm thick. Higher occur thin-bedded sandstones alternating with hard black and grey shales. This sandstone-shale com­

plex is overlain by sandstones and thin-bedded shale similar to those present in the lower part of the exposure.

Samples collected in the upper part of the exposure contain an assemblage of Foraminifera, in which, besides long-living arenaceous species: Dendrophrya robusta G r z y b o w s k i , Dendrophrya excelsa G r z y b o w s k i , Saccammina placenta ( G r z y b o w s k i ) , Glomospira charoides ( J o n e s et P a r k e r ) , Glomospira irregularis ( G r z y b o w ­ s k i ) and Trochamminoides lituiformis ( B r a d y ) occur numerous spe­

cimens of Sphaerammina subgaleata (V a ś i ć e k), and fairy numerous specimens of benthic calcareous species. The latter are represented by:

Nodosaria calomoi'pha R e u s s, Lenticulina unica M a s l a k o v a , La- gena amphora R e u s s, Globocassidulina subglobosa ( B r a d y), Nutta- lides tr u em py i (N u 11 a 1), Eponides umbonaius ( R e u s s ) , Cibicides hantkeni ( G r z y b o w s k i ) and Rotalia lithothamnica U h 1 i g. The planktonie species (PI. LV): Globorotalia cocoaensis C u s h m a n , Glo­

bigerina corpulenta S u b b o t i n a , Globigerina yeguaensis W e i n ­ z i e r l et A p p 1 i n, Globigerina eocaena G u e m b e 1, Globigerinoides index F i n l a y and Turborotalia centralis ( C u s h m a n et B e r m u ­ d e z ) indicate the Upper Eocene age of this assemblage.

Planktonie Foraminifera in the Supra-Magura Beds

Occurrences of planktonie Foraminifera were noted near Budzów (Fig. 2) in the Babia Góra region (A. J e d n o r o w s k a , 1966; F. B i e d a et all., 1967). A full profile of the Magura series of this region, from the Palaeocene to the Upper Eocene is exposed in the Droździna stream (M. K s i ą ż k i e w i c z , 1966). The Supra-Magura Beds containing the planktonie microfauna are overlying the glaukonitic sandstones of the Magura Beds. Shale intercalations in the Magura Beds did not yield microfauna. The Supra-Magura Beds contain an assemblage of calcareous Foraminifera, not very rich, but comprising index species. Planktonie species in this assemblage are represented by: Globigerina officinalis S u b b o t i n a , Globigerina ampliapertura B o 11 i, Globigerina ye gu a­

ensis W e i n z i e r l et A p p 1 i n and Globigerina triloculinoides d’O r- b i g n y (PI. LVI, Fig. 2). The presence o f Globigerina officinalis S u b ­ b o t i n a and Globigerina ampliapertura B o 11 i determine the age of this assemblage as the Eocene — Oligocene boundary. The same age is suggested b y the presence of the benthic species Cibicides lopianicus M i a 1 1 u k in the same assemblage.

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S T R A T I G R A P H I C P O S I T I O N O F T H E D E S C R I B E D A S S E M B L A G E S O F P L A N K T O N ! C F O R A M I N I F E R A

The first three assemblages of planktonic Foraminifera i. e. the assemblage from the lower part of the Beloveza Beds at Ropki, and the assemblages from the Variegated Beds at Hanczowa and at Rabka occupy the same Stratigraphie position.

The marly intercalations containing these assemblages are underlain by strata assigned to the Lower Eocene on the basis of foraminiferal fauna. Above these intercalations Middle Eocene foraminiferal assem­

blages with abundant Cyclammina amplectens G r z y b o w s k i were found at Ropki and at Rabka.

Among the planktonic species of Foraminifera present in these assemblages Acarinica crassajormis ( S u b b o t i n a ) has a great Strati­

graphie value, and moreover occur abundantly. Both the generic and the specific name adopted for this form is a matter of discussion. W. A.

K r a s h e n i n n i k o v (1964) regarded the species described by N. N.

S u b b o t i n a (1953) as Acarinina crassajormis as a synonym of the species Globorotalia bullbrooki B o l l i . The same was suggested already

b y V . P o k o r n y (1960).

W. A. B e r g g r e n (1965) noted several synonyms for the species described by N. N. S u b b o t i n a : Globorotalia bullbrooki B o l l i ; Glo­

borotalia densa ( C u s h m a n ) ; Globorotalia spinuloinjlata ( B a n d y ) . Numerous Soviet authors (among others: O. K. K a p t a r e n k o - C h e r - n o u s o v a, 1960; E. K. S h u c k a j a, I960; W. P. A 1 i m a r i n a, 1963) recognizing the genus Acarinina established by N. N. S u b b o t i n a , identify, following the suggestions of that author, the Eocene species with Globorotalia crassajormis described from the Pleistocene by G a l ­ l o w a y et W i s s l e r (1927 — fide E l l i s et M e s s i n a : Catalogue of Foraminifera). The name Globorotalia crassajormis ( G a l l o w a y et W i s s l e r ) is used, probably for the same species, by E. H a n z l i k o v ä (1965), and E. B r a t u (1967). Also Polish authors working in the Car­

pathians used the name Globorotalia crassajormis ( G a l l o w a y et W i s s l e r ) describing the form characteristic for Eocene assemblages (F. B i e d a et all., 1963; A. J e d n o r o w s k a , S. W ^ c l a w i k , 1965;

A. J e d n o r o w s k a , 1966).

In a later paper, N. N. S u b b o t i n a (1960) writing on the species Acarinina crassajormis states that this species has been established by her, thus stressing upon the difference between the species she described from the Palaeogene of the Northern Caucasus, and the species described by G a l l o w a y et W i s s l e r .

On the other hand, the western authors do not recognize the genus Acarinina established by N. N. S u b b o t i n a (1953). They place this genus among the synonym s of the genus Globorotalia (H. B o 11 i, A. L o e- b l i c h , H. T a p p a n , 1967), or Turborotalia (K. G o h r b a n d , 1963;

A. L o e b l i c h and H. T a p p a n , 1964). Still others, e.g. A. H i 11 e- b r a n d t (1962) use the name Acarinina as a sub-generic name. How­

ever, spherical tests entirely devoid of keel, covered by numerous spines, which, according to the definition of N. N. S u b b o t i n a (1953) should be assigned to the genus Acarinina, are distinctly differing from the delicate tests provided with a sharp keel of typical specimens of the genus Globorotalia (according to the definition of A. L o e b l i c h and H. T a p p a n , 1964). The covered umbilicus and the delicate wall of

— 2 8 6 ^—

the test distinguish forms belonging to the genus Turborotalia from the Acarinina. According to N. N, S u b b o t i n a (1960) the Turborotalidae form a later developed phyllogenetic branch, of Acarininae.

W. A. B e r g g r e n (1966) was right stressing upon the distinct features permitting to discdiminate between specimens of Acarininidae and phylogeneticall closely related Globorotalidae and Turborotalidae.

This author regarded Acarinina as a fully justified generic name.

As the specimens occurring very abundantly in the assemblages of planktonic Foraminifera from Ropki, Hariczowa and Rabka are closely similar to the species described by N. N. S u b b o t i n a (1953), the name Acarinina crassaformis introduced by this author is used in the present paper.

The occurrence of large numbers of specimens of Acarinina crassa­

formis ( S u b b o t i n a ) in the discussed assemblages suggest an analogy between the assemblage present in the Magura series, and the assemblage with Acarinina crassaformis described by N. N. S u b b o t i n a (1953, 1960) from the Eocene of Northern Caucasus. According to the latter author, this assemblage appears in the Middle Eocene (part of the F 1 zone — N. N. S u b b o t i n a 1960). W. A. K r a s h e n i n n i k o v (1964) reports the occurrence of this assemblage in the lower zone of the Middle Eocene. W. A. B e r g g r e n (1966) suggested that the zone with Acari­

nina crassaformis, covering the upper part of the zone of conical Globo­

rotalia (N. N. S u b b o t i n a , 1953, 1960), corresponds partly to the Glo­

borotalia palmerae zone, to the Hantkenina aragonensis zone and to a part of the Globigerapsis kugleri zone, established b y H. B o 11 i (1957) in Trinidad. According to B o 11 i, the Globorotalia palmerae zone forms the boundary between the Lower and Middle Eocene (Table 2). The

Table 1 S tr a tig r a p h ic ranges o f p la n k to n ic Foram inifera in. th e Magura

S e r i e s , according t o th e l i t e r a t u r e

P a la e - E o c e n e 01 i -

Lower Middle Upper goc ene

G lo b ig erin a o f f i c i n a l i s G lob igerin a am pliapertura Catapsydrax d i s s i m i l i s Catapsydrax unicavus G lob igerin a venezuelana G lob igerin a yeg u a en sis G lo b o ro ta lia c o co a e n sis G lob igerin a corp u len ta T u rb o ro ta lia c e n t r a l i s G lo b ig er in o id e s ind ex C hiloguem belina m artin i G lob igerin a lin a p e r ta G lo b o ro ta lia aragonen sis G lob igerin a fro n to sa A carinina crassa fo rm is A carinina pentacam erata G lob igerin a in a e q u isp ir a A carinina t r i p l e x

C hiloguem belina w ilc o x e n sis

— 287

same have been suggested by M. B. C i t a et all. (1968) who parallelised the assemblage of planktonic Foraminifera from the section of Padermo d ’Adda (Northern Italy) occurring in beds regarded as representing in age the Lower Eocene — Middle Eocene boundary, with the assemblage

w ith Acarinina crassajormis of the Soviet authors.

The same age of the described assemblages is suggested by other planktonic index species (Table 1).

The species Globorotalia aragonensis N u t t a 1 described from the Lower Eocene Aragon formation of Mexico, occurs, according to B o l l i (1957) in the upper part of Lower Eocene and in the lower part of Middle Eocene (from the Globorotalia formosa formosa zone up to the Globige- rapsis kugleri zone). A similar range of this species is reported by N. N.

S u b b o t i n a (1960). According to the latter author specimens of Glo­

borotalia aragonensis N u 11 a 1 appear in her zones d and c (Table 1).

The next two index species: Acarinina pentacamerata ( S u b b o t i n a ) and Globigerina inaequispira S u b b o t i n a were noted by many authors. Their age range covers the Palaeocene — Middle Eocene. N. N.

S u b b o t i n a (1953, 1960) described these species from the Palaeocene

— Middle Eocene strata of the Northern Caucasus. Czechoslovakian authors (V. P o k o r n y , 1960; E. H a n z l i k o v a , 1965) described them from the Lower Eocene of Western Carpathians. A. v. H i l l e b r a n d t (1962) noted them from the Palaeocene of the Reichenhall and Salzburg areas. In Hungary they were described from the Ypresian and Lutetian of the Dorog basin (L. V i t a l i s - Z i l a h y , 1968). Acarinina pentaca­

mera ta ( S u b b o t i n a ) occurs in the Ypresian and Lower Lutetian of Belgium and of the Paris basin (P. B r o n n i m a n n et all., 1968) (Table 1).

Acarinina triplex S u b b o t i n a , described from the Lower and Middle Eocene of the Northern Caucasus (N. N. S u b b o t i n a , 1953) is present also in the Upper Ypresian and in the Lower Lutetian of the Paris basin (P. B r o n n i m a n n et all., 1968). Globigerina frontosa S u b b o t i n a described from beds of the same age (N. N. S u b b o t i ­ n a , 1953) is present in the Middle Eocene of the Western Carpathians (E. H a n z l i k o v a , 1965) and in the Lower Eocene and Middle Eocene of the Eastern Carpathians (E. B r a t u , 1967).

The assemblages described above are considered as typical for the Middle Eocene, on account of the similarity to the assemblage with Aca­

rinina crassajormis (Table 2). They are stratigraphically corresponding to the assemblages with numerous Globorotalidae and Globigerina, de­

scribed from the Silesian series and the Sub-Silesian series of the Polish Flysch Carpathians (F. B i e d a et all., 1963).

The assemblage of planktonic Foraminifera from the Sub-Magura Beds at Zembrzyce, and the assemblage from the Magura Beds at Za- bełcze near N ow y Sącz are coeval, as the same index species occur in both. The age of the assemblages is determined by the presence of Glo­

borotalia cocoaensis C u s h m a n , an exclusively Upper Eocene species.

According to H. B o l l i (1957) this species appears in the lower part of the Upper Eocene and is an index form of the upper part of the Upper Eocene in Trinidad. Also in the Atlantic-Meditteranean realm it is an index form of the Priabonian (P. B r o n n i m a n n et all., 1968). A. W.

K r a s h e n i n n i k o v (1964) described it as an index form of the Upper Eocene in Syria (Table 1).

Globigerina corpulenta S u b b o t i n a is another Upper Eocene

— i28& ■—

species present in the discussed assemblages. This species described as an index form of the Upper Eocene strata of Caucasus (N. N. S u b b o ­ t i n a , 1953, 1960) forms part of the assemblage of ,.large Globigerina”.

W. A. K r a s h e n i n n i k o v (1964) considered this species as an index form for the zone with Upper Eocene nummulites: Nummu lit es chavanesi d e l a H a r p e , N. fabiani (P r e v e r), N. incrassatus d e l a H a r p e . Globigerina corpulenta S u b b o t i n a occurs together w ith Globoro­

talia cocoaensis C u s h m a n in the assemblage described by the above mentioned author.

K r a s h e n i n n i k o v (1. cit.) considered the Globigerina corpulenta zone as equivalent to the Upper Eocene Globigerapsis semiinvoluta and Globorotalia cocoaensis zones established by H. B o 11 i in Trinidad.

The occurrence of this species in the Upper Lutetian strata of the Dorog basin in Hungary, where according to L. V i t a l i s - Z i l a h y (1968) it is an index species for a zone, is probably exceptional.

Turborotalia centralis ( C u s h m a n et B e r m u d e z ) is the third species typical for the Upper Eocene. Although it has a somewhat wider range of occurrence (H. B o l l i reports it occurrence from the Middle Eocene Globigerapsis kugleri zone up to the Upper Eocene Globorotalia cocoaensis zone), but it is very characteristic for Upper Eocene assem­

blages and is reported by many authors. It occurs, among others, in Upper Eocene assemblages in Trinidad (H. B o 11 i, 1957) and in North­

ern Caucasus (N. N. S u b b o t i n a , 1953, 1960) (Table 1).

The presence of specimens of Globigerina ampliapertura B o 11 i precises even more exactly the age of the assemblage occurring in the Sub-Magura Beds at Zembrzyce.

According to H. B o 11 i (1957) this species appears first in the Upper Eocene, accompanying often specimens of Globorotalia cocoaensis C u s h m a n and Turborotalia centralis ( C u s h m a n et B e r m u d e z ) (Table 1).

Also the presence of Globigerinoides index F i n l a y is important for the determination of age of the discussed assemblage. According to H. B o l l i (1957) this species has the same stratigraphic range as T ur ­ borotalia centralis (i.e. from the Globigerapsis kugleri zone to the Glo­

borotalia cocoaensis zone). It occurs often in the Upper Eocene assem­

blages in the Carpathians (V. P o k o r n y , 1960; F. B i e d a et all., 1963;

E. H a n z l i k o v a , 1965). It occurs probably also in the Upper Eocene beds of the Northern Caucasus, determined here by N. N. S u b b o t i n a

as Globigerinoides conglobatus B r a d y .

The presence of the index forms described above lead to the con elusion that the assemblages of Foraminifera from Zembrzyce and from Zabełcze are equivalent to the Upper Eocene zone of „large Globigerina”

described from the Northern Caucasus and Crimea (N. N. S u b b o t i n a , 1963) (Table 2).

The Supra-Magura Beds at Budzów in the Babia Góra region contain an assemblage including two index species: Globigerina officinalis S u b ­ b o t i n a and Globigerina ampliapertura B o l l i . The first is an index species for the Uppermost Eocene and Lower Oligocene (N. N. S u b b o ­ t i n a , 1953, 1960). This species is noted by many authors, among others V. A. K r a s h e n i n n i k o v (1964) reports its presence in the Upper­

most Eocene and Oligocene of Syria, R. A. Mc T a v i s h from the same stratigraphic position in the Solomon Islands, L. V i t a l i s - Z i - l a h y (1968) from the Upper Eocene of the Dorog basin in Hungary.

— '2)881 —

E a m e s et all. (1962) found it somewhat earlier, i.e. in the uppermost part of the Middle Eocene of Tanganica (Truncorotaloides rohri zone).

In the Carpathians Globigerina officinalis was found in the Uppermost Eocene of the Western Carpathians (E. H a n z l i k o v a , 1965; Z. S t r a-

T a b l e 2 C o m p a r i s o n o f z o n e s e s t a b l i s h e d o n t h e b a s i s o f p l a n l c t o n i c

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— 290 —

n i к and E. H a n z l i k o v a , 1967) and of the Eastern Carpathians (E. B r a t u , 1967). It occurs also in the Uppermost Eocene and Oligocene of the Polish Flysch Carpathians (F. В i e d a et all., 1963; S. G e г о с h et all., 1967).

The species Globigerina ampliapertura according to B o l l i (1957), has a stratigraphic range from the Uppermost Eocene Globorotalia co­

coaensis zone to the Lower Oligocene for which this form is an index species (Globigerina ampliapertura zone).

The assemblage from Budzów is regarded, on the basis of the occur­

rence of the two above speciesy as equivalent partly to the assemblage with Globigerina officinalis described by N. N. S u b b o t i n a (1960) in the Uppermost Eocene, and partly to the assemblage o f small Globigerina described by the same author on the Uppermost Eocene-Lower Oligocene boundary (Table 2).

Future research w ill probably result in finding new occurrences of planktonie microfauna, which will contribute to the age determination of beds of the very interesting and complicated Magura series.

L a b o r a t o r y o f G e o l o g y P o l i s h A c a d e m y o f S c i e n c e s K r a k ó w

R E F E R E N C E S

A l i m a r i n a W . P. — А л и м а р и н а В . П . (1 9 6 3 ), Н е к о т о р ы е о с о б е н н о с т и р а з ­ в и т и я п л а н к т о н н ы х ф о р а м и н и ф е р в с в я з и с з о н а л ь н ы м р а с ч л е н е н и е м н и ж н е г о п а л е о г е н а С е в е р н е г о К а в к а з а . В о п р о с ы м и к р а п а л е о н т о л о г и и . И з д - в о А Н С С С Р ,

В Ы П . 7, С. 158— 185.

B e r g g r e n W . А . (1 9 6 5 ), S o m e p r o b l e m s o f P a le o c e n e — L o w e r E o c e n e p l a n k t o n i e f o r a m i n i f e r a l c o r r e l a t i o n s . M i c r o p a l e o n t o l o g y 11, N r . 3, p p . 2 7 8 — 300.

B e r g g r e n W . A . — Б е р г г р е н В . A . (1 9 6 6 ), П р о б л е м ы т а к с о н о м и и и ф и л о ­ г е н е т и ч е с к и х о т н о ш е н и й н е к о т о р ы х т р е т и ч н ы х п л а н к т о н н ы х ф о р а м и н и ф е р . В о п р о с ы м и к р о п а л е о н т о л о г и и . И з д -.в о А Н СССР, В ы п . 10, с. 309— 331.

B i e d a F. , G e r o c h S t., K o s z a r s k i L . , K s i ą ż k i e w i c z М . , Ż y t k o К . (1 9 6 3 ), S t r a t i g r a p h i e d e s K a r p a t e s e x t e r n e s p o lo n a is e s . B i u l . I n s t . G e o l . 181, p p . 174. W a r s z a w a .

B i e d a F. , J e d n o r o w s k a A . , K s i ą ż k i e w i c z M . (1 9 6 7 ), S t r a t i g r a p h y o f t h e M a g u r a S e r ie s a r o u n d B a b ia G ó r a . B i u l . I n s t . G e o l . , 2 1 1 , ,p p . 2 9 3 — 324.

B l a i c h e r J . (19 5 8 ), M i k r o f a u n a s e r i i m a g u r s k i e j o k o l i c G r j ' b o w a . T h e m i c r o ­ f a u n a o f t h e M a g u r a s e r ie s o f t h e G r y b ó w r e g i o n ( M i d d l e C a r p a t h i a n s ) . K w a r t . g e o l . 2, n r 2, p p . 385— 3S9.

B l a i c h e r J . (19 6 2 ), M i k r o f a u n i s t y c z n e s t r e f y k o r e l a c y j n e w p ó ł n o c n o - w s c h o d n i e j c z ę ś c i p ła s z c z o w i n y m a g u r s k i e j . K w a r t , g e o l . , n r 4, p p . 7 9 9 — 800.

B l a i c h e r J . (1 9 6 3 ), Z o n e s m i c r o f a u n i s t i q u e s d e c o r r e l a t i o n d a n s l a n a p p e d c c h a r r ia g e d e M a g u r a e n P o lo g n e . R ś s . c o m m . A s s o c . G e o l . K a r p a t o - B a l k a n i q u c V I - ё т е C o n g r e s , p p . 32— 34, V a r s o v i e — C r a c o v ie .

B l a i c h e r J. , S i k o r a W . (1 9 6 3 ), P r ó b a k o r e l a c j i w i e k o w e j w a r s t w m a g u r s k i c h w e w s c h o d n i e j c z ę ś c i p ł a s z c z o w i n y m a g u r s k i e j z u t w o r a m i g r u p y z e w n ę t r z n e j . A n a t t e m p t to c o r r e la t e t h e M a g u r a B e d s i n ith e e a s t e r n p a r t o f t h e M a g u r a N a p p e w i t h s e d im e n t s o f t h e E x t e r n a l g r o u p . K w a r t , g e o l . , 7, n r 4, p p . 6 2 0 — 628 W a r s z a w a .

B o l l i H . (1 9 5 7 ), P l a n c t o n i c F o r a m i n i f e r a f r o m t h e E o c e n e N a v e t a n d S a n F e r n a n d o f o r m a t i o n s o f T r y n i d a d . B . W . I . S t u d ie s i n F o r a m i n i f e r a . U n i t . S t a t . N a t . M u s . B u l l . 215 W a s h i n g t o n , p . 155— 172.

— 2Ш, —

В о l l i H ., L o e b l i c h A . R. , T a p p a n H . (1 9 5 7 ), P la n c t o n i c f o r a m i n i f e r a l f a m i ­ lie s H a n t k e n i n i d a e , O r b u l i n i d a e , G l o b o r o t a l i i d a e a n d G l o b o t r u n c a n id a e . S t u d ie s i n F o r a m i n i f e r a . U n i t . S t a t . N a t . M u s . B u l l . 215, p p . 3— 50.

B r a t u E . (1 9 6 7 ), D i s t r i b u t i o n d e s F o r a m i n i f e r e s p l a n c t o n iq u e s d a n s le f l y s c h i n t e r n e Р а 1 ё о с ё п е - Ё о с ё п е ä l a c o u r b u r e d e s C a r p a t e s O r ie n t a le s . R a p . S t r . A s s o c . G e o l , C a r p . - B a l k . V I I I l m e C o n g r . B e lg r a d e , p p . 3 6 7 — 373.

B r ö n n i m a n n P. , C u r r y D. , P o m e r o l C h ., S z ö t s E . (1 9 3 3 ), C o n t r i b u t i o n ä l a c o n n a is s a n c e d e s F o r a m i n i f e r e s p l a n c t o n iq u e s d e 1’Ё э с ё п е , I n c l u a n t le P a le o c e n e , d u B a s s in a n g l o - f r a n c o - b e l g e . C o ll o q u e s u r Р Ё о с ё п е P a r i s m a i 1968, M e m . B . R . G . M . n o 5'8, p . 101— 108.

C i t a M . B. , P r e m o l i - S i l v a I . , T o u m a r k i n e M. , B o l l i H. , L u t e r b a - c h e r H . P. , M o l h e r H . P. , S c h a u b H . (1S 63), L e P a le o c e n e e t 1’Ё о с ё п е d e P a d e r n o d ’ A d d a ( I t a l i e s e p t e n t r i o n a le ) . C o llo q u e s u r 1’Ё о с ё п е F a r i s m a i 1968.

M e m . B . R . G . M . n o 58, p . 6 1 1 — €37.

E a m e s F. E. , B a n n e r E. Т. , B l o w W . H. , C l a r k e J . W . (1S 62), F u n d a m e n t a l s o f M i d - t e r t i a r y s t r a t i g r a f i c a l c o r r e l a t i o n . C a m b r i d g e U n i v . P r e s s , p p . 163.

E l l i s В ., M e s s i n a A . (1 9 4 0 — 1968), C a t a lo g u e o f F o r a m i n i f e r a . S p e c . Р и Ы . A m e r . M u s . N a t . H i s t . N e w Y o r k .

G e r o c h S t., J e d n o r o w s k a A. , K s i ą ż k i e w i c z M . , L i s z k o w a J . (1 9 6 7 ), S t r a t i g r a p h y B a s e d u p o n M i c r o f a u n a i n t h e W e s t e r n P o li s h C a r p a t h i a n s , B i u l . I n s t . G e o l . 211, p p . 185— 282.

G o h r b a n d t K . (1 9 6 3 ), Z u r G l i e d e r u n g d e s P a lä o g e n i m H e l v e t i c u m n ö r d l i c h S a lz b u r g n a c h p l a n k t o n i s c h e n F o r a m i n i f e r e n . M i t t . G e o l . G e s . W i e n . B a n d 56, H e f t 1, p p . 1— 177.

H a n z l i k o v ä E . (19 6 5 ), S t r a t i g r a p h i e d e r K r e i d e u n d d e s P a lä o g e n s d e r F l y s c h - z o n e d e r W e s t k a r p a t e n . G e o l . S h o r n . S l o v . A k a d . W i e d . X V I 1, B r a t i s l a v a , p . 33— 64.

H i l l e b r a n d t V . A . (1 9 6 2 ), D a s P a le o z ä n u n d s e in e F o r a m i n i f e r e n f a u n a i n В э - c k e n v o n R e ic h e n h a l l u n d S a lz b u r g . B e y r . A k a d . W i s s . M a t h . - N a t u r w . K l a s . A b h . N e u e F o lg e , H e f t 108., p . 180.

J e d n o r o w s k a A . (1 9 6 6 ), Z e s p o ły m a ł y c h c t w o r n i c w w a r s t w a c h j e d n o s t k i m a g u r s k i e j r e j o n u B a b i e j G ó r y i i c h z n a c z e n ie s t r a t y g r a f i c z n e . I . G . P r z c w . X X X I X Z j a z d u P T G B a b i a G ó r a , p . 71— 90.

J e d n o r o w s k a A . (19'63), Z e s p o ły o t w o r n i c o w e w z e w n ę t r z n y c h s t r e f a c h j e d ­ n o s t k i m a g u r s k i e j K a r p a t i i c h z n a c z e n ie s t r a t y g r a f i c z n e . P r . g e o l . P A N , n r 53, p p . 1C 6.

J e d n o r o w s k a A. , W ę c ł a w i k S t. (1 9 6 5 ), A c c u m u l a t i o n d e G l o b o r o t a l i e s e t d e G l c b i g e r in e s d a n s le s c o u c h e s d e 1’Ё о с ё п е d e l a n a p p e d e M a g u r a d e la r e g io n R o p k i - H s ń c z o w a (B a s . B e s k id e ) . B i u l . A c a d . P o l . S c . S e r . sc. g e o l g ć o g r . 12, n o 1, p . 59 — 65.

K a p t a r e n k o - C h e r n o u s o v a O . K . — К а п т а р е и к O' - Ч е р н о у с о - в а О . К . (1 9 6 0 ), З о 'н а л н а я с т р а т и г р а ф и я п а л е о г е н о в ы х о т л о ж е н и й У к р а и н ы п з ' о с н о в е р а з в и т и я ф о р а м и н и ф е р в. к н . П а л е о г е н о в ы е о т л о ж е н и я га га е в р о - п е й с к о й ч а с т и С С С Р . Т р у д ы В Н И Г Р И , Н о в а я с е р и я В и п . 7 6 , с. 126— 134.

K o z i k о w s k i H . (1 9 5 6 ), Z a r y s g e o lo g ii o k o l i c R a b k i. C n t h e g e o lo g y o f t h e R a b k a r e g i o n . A c t a g e o l . p o l . 6, p . 382— 402. W a r s z a w a .

K o z i k o w s k i H . (e n p r e s s e ) — F a c j a l n e i s t r u k t u r a l n e s t r e f y p ł a s z c z o w i n y m a ­ g u r s k i e j w P o ls c e i ic h z w ią z e k z b i t u m i c z n o ś c ią r e g i o n u .

K r a s h e n i n n i k o v W . A . — К р а ш е н и н н и к о в В . A . (1 9 6 4 ), З н а ч е н и е ф о - р а м и н и ф е р о т к р ы т ы х т р о п и ч е с к и х б а с с е й н о в д а т с к о с о и п а л е о г е н о в о г о в р е ­ м е н и д л я р а з р а б о т к и м е ж д у н а р о д н о й с т р а т и г р а ф и ч е с к о й ш к о л ы . В о п р о с ы м и к р с 'л а л е о н т с л о г и и . И з д - в о А Н С С С Р , В ы п . 8, с . 190— 213.

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