On the stratigraphy and lithology of the flysch zone in the surroundings of the Hagenbach-Valley (Northern Vienna Woods, Austria)

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 I £ T £ G f i 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

FR IEDR ICH B R I X *

ON THE STRATIGRAPHY AND LITHOLOGY OF THE FLYSCH ZONE IN THE SURROUNDINGS OF THE HAGENBACH-VALLEY (NORTHERN VIENNA WOODS,

AUSTRIA)

(2 Figs.)

Über die Stratigraphie und Lithologie der Flyschzone in der Umgebung des Hagenbachtales (nördlicher Wienerwald,

Österreich)

(2 Ü9.)

A b s t r a c t : This study on the stratigraphy and lith o lo g y o f the f ly s c h se d ­ im e n ts of the H agen bach area is s u p p le m e n tin g the p a le o n to lo g ica l pa pers in this

v o lu m e by W. G r ü n and H. S t r a d n e r . T h e topographical and tectonical chapters are fo llo w e d by the detailed descriptions of those outcrops w h ic h are treated in th e p aleon to lo g ical papers. T h e m a p p in g by 'the author resulted in the e sta b lish m e n t of a sy ste m of tectonic slices in the northern m ost tectonic unit of the n o r th -a lp in e fly s c h zone („G reifensteiner S c h u p p e n z o n e ”). T h e n or th e rn m ost lo w e s t slice show s a Stratigraphie profile ranging from the L o w e r C retaceous W o lf- pa ssin g Beds to the Upper G r e ife n stein Beds (upper part of the L o w e r Eocene).

A lo w er and an upper c o m p le x can be distin g u ish ed w it h in the G re ife n s te in Beds.

B e t w e e n t h e s e c o m p le x e s a m in o r tectonic p h a s e can be a ssum ed.

The se d im e n to lo g ic a l stu d y of the h e a v y m in era l contents proved furtherm ore, t h a t a structural Stratigraphie hiatus lies b e t w e e n the W o lfp a ssin g Beds and the Wörde,rn Beds. W ithin th e A ltle n g b a c h B eds a gradual change of the h e a v y m in eral a sso ciatio n s can be observed. T h e L o w e r G r e ife n stein B eds are c o n fo rm a b ly o v e r - l y in g the A ltle n g b a c h Beds and s h o w sim ilar h e a v y m in e r a l associations. T h e U p p er G re ife n stein Beds ly in g in structural d iscord an ce over th em indicate a n e w c y c le of sedim entation. D e te rm in a tio n s of the carbonate conten ts s u p p le m e n t th e data o f the lithology. In Upper Cretaceous and L o w e r P a le o g en e s e d im e n ts fly s c h fa c ie s is p red om in a tin g, as can be proved by cases of graded bedding and co n v o lu te bedding.

T h e relation o f quartz arenites to clays and c la y e y m arls in the a v e r a g e is 4 : 1 (Upper Cretaceous to L o w e r Eocene) in the H agen bach Area.

1. INTRO DU CTIO N

A team of Austrian geologists and paleontologists has been studying the flysch zone near Vienna during the last years. We w elcom e the occasion of the centenary o f J. G r z y b o w s k i’s birthday to contribute the preliminary results of our work. The area of the H agenbach-Valley

* Address: Ing. Friedrich B r i x, ÖMV AG, Otto W agnerpl. 5, A 1090, W ien.

Ö sterreich .

— 4 5 6 —

near St. Andrä in the northern part of the Vienna Woods w as chosen by the authors dividing their topics as follows: F. B r i x, L ithology and Stratigraphy; W. G r ü n , M icrofauna (p. 305) and H. S t r a d n e r, Nannoflora (p. 403). The enclosed maps inform on the topography and geology of the area and are also intended to b e used w ith the papers by W. G r ü n and H. S t r a d n e r .

W ith the paleontological and stratigraphical research on this area already in progress, corresponding lithological studies of this part of the flysch zone are still in an initial phase. Thus it is possible to contribute a short survey only. A ll three papers have the character of prelim inary

notes and research work is being continued.

G e n e ra liz e d G eolo gical Map ot th e S u rro u n d in g s c f Vien na

0 10 20 30 (0 50 k n

1 i____ i____ ■ ■ ■

Fig. 1

Thanks are due to the General Direction of the österreichische M i­

neralölverwaltung AG for permission granted to publish scientific results by F. B r i x and partly by H. S t r a d n e r , w hich were carried out as

GEOLOGICAL MAP OF THE HAGENBACH - A R E A (VIENNA WOODS) by F B r i x 19 6 9

U6 B _G^U_R^P_E^P_IF^ER_{ENSTEIN BEDS} ^{EXPOSURE B}_U^O_N^U_C^N_E^D_R^A_T^R_AIN^{Y OF BEDS}

DIPPING 80°

OVERTHRUST LINE

AX383 S^ALE^TA^IT - LE^{UDE A}VE^BL^{OVE ADRIA}

BOUNDARY OF BEDS CERTAIN

ROADS

200 __I I

400 600m _ J ___ I___ I

— 4,5(7 —

part of the com pany’s exploration projects. The evaluation of the seism ic shotpoints and the results obtained by the „Laboratory for exploration and production of the OMV A G ” deserve special acknowledgm ent. Also m any thanks to Dr. I. M a u r e r for heavy mineral analyses as w ell as to Dr. K. T u r n o v s k y for m icropaleontological analyses, to Dr. H. H a w 1 e for chem ical and. other laboratory tests, and to Dr. H. S t r a d n e r , Geological Survey of Austria, for his assistance

in translating the text into English.

2. T O P O G R A P H IC A L C H A R A C TE R ISTIC S OF THE A R E A

The Hagenbach-Gorge and its surroundings Lie appr. 16 to 17 km to the NW of the City of Vienna. The Hagenbach (a sm all creek) is flowing through this gorge from SSW to NNE. In its upper course near the village of Unterkirchbach, the v a lley is wide and flat as are many of the valleys in the flysch area of the Vienna Woods. West of the village of Hinters- dorf the valley changes into a gorge extending to the northern margin of the flysch zone near St .Andra. This gorge is appr. 2.500 m eters in length. The difference in level from the gorge floor to the old landscape on either side of the gorge ranges from 70 to 100 meters.

The altitude above sea-level at the southern entrance of the gorge is appr. 290 meters, at its exit in the north near St. Andra appr. 190 meters.

The conditions of the geological outcrops w ithin the gorge are excellent compared to other parts of flysch zone. The structure of the northernmost tectonic unit of the Northalpine flysch zone is exposed in this gorge to such an extent that essential feature's of geology and tectonics are revealed.

3. H IS T O R IC A L REVIEW

A short survey of the more important papers published since 1898 is to supplem ent the bibliography given at the end of this paper. C. M.

P a u l (1898) has considered the entire area as of Paleocene age. He assumed how ever the existence of Upper Cretaceous beds in the envi­

ronment of St. Andra.

R. J a e g e r (1914) established a sound basis for the stratigraphy of the Northalpine flysch zone after collecting a large number of fossils.

Near St. Andra, for exam ple, he discovered Aptychi, which proved Lower Cretaceous age for the W olfpassing Beds. At the northern exit of the Hagenbach-Gorge R. J a e g e r proved Upper Cretaceous by finding Orbitoides. He also was the first to discover wrench faults near Konig- stetten and St. Andra at the northern margin of the flysch zone.

K. F r i e d 1 (1921) published a map in the scale of 1 : 75.000 covering also the Hagenbach area. He distinguished betw een „Neocomian flysch ”,

„Orbitoidenkreide” of Upper Cretaceous age, and „G reifensteiner Sand- stein ” of Eocene age. Later papers by the same author (1922 a, b, 1931) are dealing w ith tectonical problems m ainly.

G. G o t z i n g e r has been studying the Vienna Woods since about 1920. Larger com prehensive papers were published by him (the first together w ith H. B e c k e r ) in 1932, in 1945 ( G o t z i n g e r , 1945 a, b) and 1951. The „Geological Map of the Surroundings of V ienna”, in which the eastern part of the Vienna Woods is included, was published in 1952, the explanations to that map in 1954. G. G o t z i n g e r tried a detailed zonation by making use of new ly collected fossils and by m eans of

— 4,5-8 —

lithological comparisons. Further progress was achieved b y the intro­

duction of heavy mineral analyses by G. W o l e t z (1950, 1963) and by H. W i e s e n e d e r (1952). R. N o t h supplied valuable m icropaleonto- logical data. G. G o t z i n g e r introduced the term ,,Altlengbacher Schichten” (Altlengbach Beds, Upper Senonian) and also applied it for certain parts of the Hagenbach area. The lim its of the G reifenstein Sandstones thus w ere more restricted. 1949 F. B r i x has begun to study the Flysch zone near Vienna. The northern part betw een Riederberg and Danube River was mapped by him for the OMV AG (internal report- 1956 by F. B r i x and R. M i 11 e s). During these investigations the discordant bedding of the Lower Eocene over the Cretaceous beds was discovered. M icropaleontological analyses (K. T u r n o v s k y ) , heavy mineral analyses (I. M a u r e r ) and carbonate analyses (H. H a w 1 e) were worked out to supplem ent the results of the field work. A compi­

lation of the results gained in the northern part of the flysch zone is given in the paper by F. B r i x and K. G o t z i n g e r (1964).

Since 1954 A. P a p p has studied Orbitoides from Alpine localities.

In 1956 he published on the Orbitoides of the Upper Cretaceous flysch of the Vienna Woods. Several species of Orbitoides were described from the Hagenbach — Gorge and from St. Andra, som e of them were new for the science. A series of strata of Upper Campanian age (Hagenbach- -Gorge) could be distinguished from a series of strata of M aestrichtian age (St. Andra).

The Nummu lites of the Greifenstein Sandstone at the outer margin of the flysch zone were described by A. P a p p (1962) and were classified as Lower Eocene (Cuisian) species.

Since 1960 H. S t r a d n e r and F. B r i x began to check nannofossils from the flysch of the Vienna Woods for their stratigraphic significance.

Soon more than 50% of the samples taken from marl exposures could be evaluated (F. B r i x , 1961; H. S t r a d n e r , 1961; H. S t r a d n e r &

A. P a p p , 1961). For numerous exposures new age determ inations could be given by the nannofossil method. Tectonical problems are treated in a paper by S. P r e y , 1965. He attem pts to connect the tectonic units of the W estern Carpathians w ith those of the Eastern Alps. The G reifenstein Sandstones, as they are occurring in the Hagenbach — Gorge are corre­

lated with the Ciężkowice Sandstones of the Silesian nappe. A survey of his view s on the stratigraphy of the flysch zone of the Vienna Woods is offered in S. P r e y , 1968. He uses the follow ing units of strata:

Greifenstein Sandstone (Lower to Middle Eocene), Altlengbach Beds (Maestrichtian — Paleocene), Gault — flysch and Neocomian — flysch.

4. TECTONIC P O SIT IO N

As mentioned before the Hagenbach — Gorge is situated in the northernmost tectonic unit of the Northalpine flysch zone. This unit was called „Greifensteiner Decke” (G reifenstein nappe) by K. F r i e d 1 (1921), „G reifensteiner Teildecke” (G reifenstein partial nappe) by G.

G o t z i n g e r (1945 a) and „Greifensteiner Schuppenzone” (Greifenstein zone of tectonic slices) by F. B r i x in F. B r i x & K . G o t z i n g e r (1964). As became evident in the Mauerbach la deepw ell (OMV AG) the flysch zone was thrust over the m olasse zone over a distance of at least 4 kilom eters, probably even 10 to 15 kilometers, the overthrust plane being com paratively flat (F. B r i x , 1966).

— 459* —

The Hagenbach — Gorge is crossed by a wrench fault (fig. 1 and 2).

This wrench fault is only of sm all dim ensions and extends from St. Andra in SSE direction. A parallel wrench fault is found in the w est of the W olfpassinger Berg. The eastern flanks of these faults have been moved in NNW direction. This type of faulting is to be observed frequently near the northern margin of the Alpine flysch zone (K. F r i e d 1, ‘1922 b).

The Greifenstein zone o f tectonic slices is represented by two slices in Table 1 HEAVY MINERAL ASSOCIATIONS IN SANDSTONES

Exposure

no. Beds

zir­

con

%

ruti­

le

tour­

mali­

ne

steu- roli-

te

gar­

net

other heavy minerals a) LOWEfi TECTONIC

SLICE

662/1 Wolfpassing B. 73 18 6 3

662/2 Wolfpassing B. 43 39 4 14

29/2 WBrdern B. 16 18 1 64 1 (monazite)

670/1 Wördem B. 1 1 10 87 1 (chlorite)

670/2 WtJrdem B. 4 7 1 87 1 (titanite)j

2054/1 o Wördem B. 5 6 2 3 83 1 (apatite)

2054/2 u Wördem B. 5 5 1 4 85

114/4 Altlengbach B. 20 2 2 75 1 (chlorite)

406/2 o Altlengbacb B. 46 23 10 4 17

406/3 u Altlengbach B. 57 17 17 8 1 (anatase)

27/2 Lower Greifenstein B. 47 23 27 3 (monazite) 405/2 o Lower Greifenstein B. 41 26 5 27 1 (anatase) 405/1 u Lower Greifenstein B. 67 24 3 5 1 (apatite)

402/4 Lower Greifenstein B. 44 8 9 39

402/3 Lower Greifenstein B. 45 12 5 1 37

112/10 Upper Greifenstein B. 70 7 18 4 1 (spinel) 400/1 o Upper Greifenstein 3. 68 15 8 9

400/2 u Upper Greifenstein B. 58 32 4 5 1 (spinel) 399/2 o Upper Greifenstein B. 61 23 12 2 1 (spinel)

1 (brookite) 399/3 u Upper Greifenstein B. 68 11 17 4

2060/1 u Upper Greifenstein B. 89 9 1 1 b) UPPER TECTONIC

SLICE

1996/1 Altlengbach B. 21 7 6 1 64 1 (monazite)

2 00 7 /1 Altlengbach B. 28 6 4 1 60 1 (epidote)

Percentage of non - opacous heavy minerals; o - overlying part of the layer; u - underlying part of the layer; B. - Beds

— 46 Q

the Hagenbach area. The northern, low er slice consists of beds of Lower Cretaceous, Senonian and Paleogene age. This is the slice in which the Hagenbach — Gorge is situated. The southern, upper slice has its northern margin near Hintersdorf and consists of Upper Senonian and Paleogene.

Other dislodged slices are to be found further to the south, beyond the area dealt w ith in this paper.

The dip of the strata of the lower slice is flattening near the contact w ith the upper slice, the dip being norm ally SE to SSE. At one location NW of Unterkirchbach there is even a steep dip to NW due to the pressure exerted by the overthrusting upper slice on the capping beds of the low er slice (exposure no. 2019, fig. 2). G enerally it can be said, that the sliding planes o f the flysch slices are flat.

It deserves special emphasis, that the Lower Cretaceous beds of the low er slice differ from the overlying younger beds by being more intricately folded and by showing only few characteristics of the typical flysch facies.

5. S T R A T IG R A P H Y A N D L IT H O L O G Y

a) G e n e r a l R e m a r k s

The follow ing chapter brings lithological descriptions of characteristic strata of the low er slice. Points from which fossils were collected, are listed. The position of exposures and the dipping of the beds is given in the geologic map (fig. 2). Only points, where fossils w ere found, are listed from the upper slice, which resem bles the lower slice regarding its lithology.

The heavy m ineral contents are shown in table 1, the carbonate analyses in table 2. As the geologic age is not so w ell established for some strata involved, the follow ing collective terms are applied:

W olfpassing Beds: Neocom ian + Gaultian

Wordern Beds: Santonian to Lower Campanian

A ltlengbach Beds: Upper Campanian to Lower Paleocene

Lower G reifenstein Beds: Upper Paleocene to low er part of Lower Eocene

Upper Greifenstein Beds: Upper part of Lower Eocene.

The reasons for distinguishing two com plexes of different age within the Greifenstein Beds are the following: In the Hagenbach — Gorge as w ell as in the area of G reifenstein and Hoflein (two villages appr. 5— 6 km ENE of the Hagenbach — Gorge) a sequence of thick bedded and m assive G reifenstein Sandstones, partly w ith graded bedding, w ithout nannofossils, but w ith Nummu lites and other foram inifera of Lower Cuisian age ( = Lower G reifenstein Beds) is being overlain by thin bedded sandstones w ith m any intercalations o f clayey marls or marly shales, the upper part of the G reifenstein Beds. In these upper Beds, especially in the marls, nannofossils are rather frequent and so are arenaceous fora­

minifera ( = Upper Greifenstein Beds).

Typical for the Lower Greifenstein Beds w ith only rare thin layers of clay are the exposures no. 401— 405 in the Hagenbach — Gorge (fig. 2), the big quarry betw een G reifenstein and Hoflein, that is the socalled

„Hollitzer — Steinbruch”, type locality, and the rocks exposed beneath the m ediaeval castle of Greifenstein.

Typical for the Upper G reifenstein beds are the exposures no. 112, 400, 2057, 399, 2058, 2059 and 2060 in the Hagenbach — V alley (fig. 2)

— 461' —

and the quarries in the area w ith in a distance of appr. 1 km ESE from the village of Hoflein. The beds betw een the exposures no. 400 and 2060 in the Hagenbach — V alley are proposed as type locality.

Another important argument for distinguishing the Lower from the Upper Greifenstein Beds is given by the tectonical discordance which

i'able 2 AVEKüGii CAKBONATi, CONTi^TS in '/I (LOwLR SLICE)

Expo­

s ur e

r,n. Beds sam­

p l e s

ave rage c a rb . c o n t s .

o f sand­

s t o n e s

p l e tsam­

a ve rag e c a rb . c o n t s . c l a y sof marlsand

t o t a l numb er

o f samples

ave ra g e p e r c e n t a ­ ge of al l samples

662 Wolfpassing B. 2 4 , 0 2 1 0 , 7

2 0 2 Y.'olfpassing B. 1 4 3 , C 1 2 3 , 5

2025 V.olfpass ing 3.

Wolfjjassing B.

1 0

7 1 6 , 2

■29 Wördern B. 2 6 , 2 1 0

2 0 5 4 Wttrdern B.

Wördern B.

2 21 ,1

5 9 ,1

1 1 4 A l t l e ng b ac h B. 3 ^{2 4 , 6} 2 1 0 , 5

405 A l t l e n g b a c h B. 2 ^{1 2 , 8} 1 0

27 '

A l t l e n g b a c h B.

A l t l e n g b a c h B.

1 1 9 , 7

9 1 3 , 5

27 Lower G r e i f e n s t e i n B. 1 0 405 Lewer G r e i f e n s t e i n B. 2 3 , 6 4 0 2 Lower G r e i f e n s t e i n

Lower G r e i f e n s t e i n B.

B.

2 0 , 1 2 0

7 0 , 9

1 1 2 Upper G r e i f e n s t e i n B. 3 0 1 2 5 , 8

4 0 0 Upper G r e i f e n s t e i n B. 2 9 . 2 2 1 , 5

599 Upper G r e i f e n s t e i n B. 2 2 4 , 5 2 1 0 , 4 111 Upper G r e i f e n s t e i n B. 1 5 , 9

2060 Upper G r e i f e n s t e i n B. 2 3 3 , 6 2 6 , 8

Upper G r e i f e n s t e i n B. 17 1 3, 1

B. - Beds

separates these two com plexes. In the Hagenbach — V alley the Lower G reifenstein Beds of the low er slice are dipping 60— 65°, w hereas the Upper G reifenstein Beds show a dip of 20— 55° on ly (fig. 2).

In the upper slice the Upper Cretaceous A ltlengbach Beds are also overlain by Lower G reifenstein Beds (exposure no. 1987). The Upper G reifenstein Beds are lying discordantly above the low er part of the A ltlengbach Beds in the area E o f Hintersdorf (exposure no. 1981). Here Lower G reifenstein Beds are absent. Thus a weak tectonic phase can be assured during the Lower Eocene (between Lower and Upper Cuisian) for the flysch strata of the Vienna Woods.

— 462 —

In the Hagenbach area hitherto no beds of Cenomanian to Coniacian age have been discovered. This hiatus leads to the conclusion that the W olfpassing Beds and the Wördern Beds are not a continuous sequence.

In the Mauerbach la w ell (ÖMV AG) the entire flysch — nappe was penetrated to a depth of 2.364 meters. Neither in cores nor in cuttings any paleontological indications of the low er part of the Upper Cretaceous age were found.

The ratio of sandstones (mostly quartz arenites) to clay, clayey marls and marls is rather variable in the different groups of beds. The W olf- passing Beds show a ratio of appr. il : 2, the Wördern Beds a ratio of appr. 6 : 1 , the Altlengbach Beds a ratio of appr. 3 : 1 , the Lower Greifen­

stein Beds of appr. 6 : 1 , and the Upper Greifenstein Beds of appr. 1 : 1 . In the average the flysch rocks of Upper Cretaceous to Lower Eocene age show a sandstone to clay and marl ratio of about 4 : 1 . This fact explains w hy in poorly exposed areas of the northern flysch zone of the Vienna Woods layers of marls or clays suited for paleontological in vesti­

gations are only rarely found.

Those samples of m arls and clays w hich are cited in the papers by H. S t r a d n e r (1969) and by W. G r ü n (1969) were taken from expo­

sures w hich in position and station number correspond to those mentioned in the present paper.

b) L o w e r s l i c e o f t h e G r e i f e n s t e i n Z o n e o f T e c t o n i c S l i c e s

W o l f p a s s i n g B e d s :

E x p o s u r e no. 662: s a n d s t o n e s , light brow nish-grey to ligWt blueish-grey, fine-grained; s a n d s t o n e s , yellow ish-brow n, fine- to medium-grained, marly, friable (defile, sunken road).

F o s s i l s : Ap ty ch u s pusillus P e t . , Aptychus cf. seranonis C q d . Aptychus cf. undatocostatus P e t . , a fish — tooth ((R. J a e g e r , 1914), Coccolithus barnesae B l a c k & B a r n e s , Parhabdolithus embergeri ( N o e l ) (H. S t r a d n e r , internal report).

E x p o s u r e no. 202: c a l c a r e n i t e s , blueish-grey to reddish- -grey, fine-grained, m any veins of calcites, partly transitions to lim e­

stones; m a r l y s c h i s t s , grey to dark grey, thin bedded (abandoned quarry).

F o s s i l s : The same as no. 662, besides Lenticulina sp., Quinquelo- culina sp., Textularia sp., Virgulina sp., Ammodiscus sp. (K. T u r n o v - s k y in F. B r i x and R. M i l l e s 1956).

E x p o s u r e no. 2024: s a n d s t o n e s , light greyish-yellow , fine- to medium-grained; c a l c a r e n i t e s , grey and light brown, fine- -grained, hard (floor o f a path).

E x p o s u r e no. 2025: s a n d s t o n e s , greyish-blue to greyish- -brown, a little m arly, fine-grained; s a n d s t o n e s , blackish-grey, hard, splintery, fine-grained; c a l c a r e n i t e s to l i m e s t o n e s , light-grey, partly w ith dark grey, chest nodules, hard, compact, many thin veins of calcites; s h a l e s , black, thin bedded (floor of a path).

W ö r d e r n B e d s :

E x p o s u r e no. 29: Alternation of s a n d s t o n e s , grey, m edium - -grained, micaceous, friable; s a n d s t o n e s , greyish-brow n, very coarse-grained, friable; m a r l y s h a l e s , dark grey, arenaceous, bitu­

minous (scarp near the road).

F o s s i l s : Bathysiphon sp. (K. T u r n o v s k y in F. B r i x and R. M i 11 e s, il956).

— 4 6 3 —

E x p o s u r e no. 670: s a n d s t o n e s , grey, coarse-grained, hard;

s a n d s t o n e s , light brown, medium-grained, friable (scarp near the road).

F o s s i l s : Orbitoides sp. (R. J a e g e r , 1914); Orbitoides sp., Pecten sp. (G. G ö t z i n g e r , 1951); Orbitella apiculata S c h l u m b . (A. L i e- b u s, 1938); Dendrophrya robusta G r z y b., Trochamminoides sp. (R.

N o t h in G. G ö t z i n g e r , 1954).

E x p o s u r e no. 671: rocks like in no. 670 (scarp near the creek bed).

F o s s i l s : Orbitoides sp. (R. J a e g e r , 1914).

E x p o s u r e no. 2054: s a n d s t o n e s , light grey, m edium - to coarse-grained, very friable, thick bedded (scarp near the road).

E x p o s u r e no. 30: s a n d s t o n e s , brown, very coarse-grained, friable, with thin lenses of grey marls (in the creek bed).

A l t l e n g b a c h B e d s :

E x p o s u r e no. 114: alternation of: c a l c a r e o u s s a n d s t o n e s , blueish-grey to grey, fine- to medium-grained, micaceous, sm all pieces of lignites, veins of calcites; s a n d s t o n e s , grey, coarse-grained, friable; s a n d s t o n e s , blueish-grey, coarse-grained, hard, veins of calcites; c a l c a r e o u s s a n d s t o n e s , grey to dark brownish-grey, fin e- to medium-grained, much mica and fossils plants on the bedding planes, veins o f calcites; m a r l s , greyish-brown, arenaceous; s h a l e s , grey, thin bedded; m a r l s to m a r l y s h a l e s , grey, foliated (scarp above the path).

F o s s i l s : Ammodiscus incertus (d’Or'b.), Trochammina sp., Bathy- siphon sp. (K. T u r n o v s k y i n F. B r i x and R. M i 11 e s, 1956). Micu- la staurophora (G a r d.) (F. B r i x , 1961); Arkhangelskiella cymbiform is V e k s h. (H. S t r a d n e r , internal report), W. G r ü n 1969 (in this volum e).

E x p o s u r e no. 1034: s a n d s t o n e s , grey, coarse-grained, friable, partly conglomeratic; s a n d s t o n e s , greenish-grey, medium-grained, very friable; c l a y e y m a r l s , dark grey, soft (creek bed).

F o s s i l s : Orbitoides media ( P a p p), Orbitoides media megalofor- mis (P a p p & K ü p p e r ) , Orbitoides jaegeri (P a p p & K ü p p e r ) , Lepidorbitoides bisambergensis ( J a e g e r ) (A. P a p p, 1956, W. G r ü n 1969).

E x p o s u r e no. 406: alternation of: s a n d s t o n e s , light brown, medium-grained; m a r l s , grey, partly violet-brow n (scarp near the path).

F o s s i l s : W. G r ü n 1969.

E x p o s u r e no. 1980: seism ic shotpoint ÖMV AG 102/2,0: s a n d ­ s t o n e s , light grey, medium-grained, veins of calcites; c l a y e y m a r l s and s h a l e s , dark grey to grey, hard.

F o s s i l s : Arkhangelskiella cymbiformis V e k s h . , Micula stauro­

phora (G a rd.), Cylindralithus sp., Zygodiscus spiralis (Br. & M.), Cocco- lithus gallicus (S t r a d.), Deflandrius intercisus ( D e f 1.) (H. S t r a d n e r , internal report); Rhabdammina sp. (K. T u r n o v s k y , internal report);

E x p o s u r e no. 27 (basal part): c a l c a r e o u s s a n d s t o n e s , blueish-grey to grey, fine-grained to m edium -grained, hard; m a r l s : light grey to dark grey (abandoned quarry).

L o w e r G r e i f e n s t e i n B e d s :

E x p o s u r e no. 405: s a n d s t o n e s , brown to light brown, m e- dium -grained to coarse-grained, thick bedded; layers of m a r l s are rare (scarp near the path).

— 464 —

E x p o s u r e no. 404: s a n d s t o n e s , brown to light brown, m e­

dium - to coarse-grained, very friable, thick bedded (to 4 meters); layers of m a r l s rare (scarp near the path).

E x p o s u r e no. 402: s a n d s t o n e s , brown to brow nish-grey, m edium-grained, hard; m a r l s , greyish-green, soft, thin bedded (high

bank of the creek).

F o s s i l s : Psammosiphonella cylindrica ( G l a e s s n e r ) , Ps amm o- siphonella rzehaki ( A n d r e a e ) , Glomospira sp., ? Dendrophrya sp., Reophax sp., ? Psammosphaera sp. (K. T u r n o v s k y , internal report).

E x p o s u r e no. 401: s a n d s t o n e s , greyish-brow n, coarse-grain­

ed, friable, m ostly thick bedded (bank of the creek).

F o s s i l s : W. G r ü n 1969.

U p p e r G r e i f e n s t e i n B e d s :

E x p o s u r e no. 112: s a n d s t o n e s , brown to yellow ish-brow n, coarse-grained, hard; s a n d s t o n e s , light grey to light brown, m edium - -grained, hard, carbonate-m atrix, micaceous; m a r l s , grey to brow nish- -grey (scarp near the path, slide slope).

F o s s i l s : Cibicides cf. cushmani N u t t . , Globigerina sp., Asteri- gerina sp., Nodosaria sp., rests of Ostracodae (K. T u r n o v s k y in F.

B r i x, 1961); Discoaster lodoensis Br. & R., D. barbadiensis Br. & R., D. mirus D e f 1., D. binodusus Ma r t . , D. kuepperi (S t r a d.), Cocco- lithus pelagicus (W a l l . ) S c h., C. grandis B. & R., C. eopelagicus Br. &

R., M arthast erites tribrachiatus (Br. & R.) D e f 1. (F. B r i x , 1961; H.

S t r a d n e r , 1961).

E x p o s u r e no. 400: s a n d s t o n e s , greyishnbrown to grey, m e­

dium -grained to coarse-grained, hard, micaceous, thick bedded; m a r l s , grey, thin bedded (bank of the creek).

F o s s i l s : H. S t r a d n e r , 1969; W. G r ü n , 1969; Rheophax splen­

didus G r z y b . ; Psammosiphonella cylindrica (Gl.), Dendrophrya sp., Haplophragmoides sp. (K. T u r n o v s k y , internal report).

E x p o s u r e no. 2057: rocks like no. 400; bank of the creek.

F o s s i l s : W. G r ü n 1969 (in this volume).

E x p o s u r e no. 399: s a n d s t o n e s , brown, m edium -grained, friable; m a r l s , grey, partly shaly, thin bedded (bank of the creek).

F o s s i l s : H. S t r a d n e r 1969.

E x p o s u r e no. 2059: s a n d s t o n e s , brownish-grey, medium- -grained, soft; m a r l s , grey, partly thick bedded (bank of the creek).

F o s s i l s : H. S t r a d n e r 1969.

E x p o s u r e no. 2060: alternation of: s a n d s t o n e s , grey, m e­

dium-grained, micaceous, on the low er bedding plane trails of Palaeo- bullia sp.; c l a y e y m a r l s , dark grey, thin bedded (bank of the creek).

F o s s i l s : H. S t r a d n e r , 1969; W. G r ü n , 1969.

c) U p p e r S l i c e o f t h e G r e i f e n s t e i n Z o n e o f S l i c e s . In this chapter only those exposures are listed where new fossil- findings could be made.

Altlengbach Beds:

E x p o s u r e no. 2063: W. G r ü n 1969; bank of the creek.

E x p o s u r e no. 2001: W. G r ü n 1969; bank of the creek.

E x p o s u r e no. 110: W. G r ü n 1969; bank of the creek.

E x p o s u r e no. 1982: seism ic shotpoint, ÖMV AG 108/26,5. Rhab- dammina abyssorum M. S a r s, Trochamminoides sp., Dendrophrya sp.

— '4681 -

(K. T u r n o v s k y , internal report). Coccolithus barnesae B l a c k , M i­

cula staurophora ( G a r d.) (H. S t r a d n e r , internal report).

E x p o s u r e no. 1984: seism ic shotpoint, ÖMV AG 108/30,5. Dendro- ph ry a sp., Trochamminoides folium (G r z y b.). (K. T u r n o v s k y , inter­

nal report). Coccolithus bam es ae B l a c k , Micula staurophora ( G a r d.), Eiffellithus turriseiffeli (D e f 1.); (H. S t r a d n e r , internal report).

E x p o s u r e no. 1985: seism ic shotpoint, ÖMV AG, 108/34,5, Ark ha n­

gelskiella cymbiformis V e k s h. (H. S t r a d n e r , internal report).

E x p o s u r e no. 11986: seism ic shotpoint, ÖMV AG 108/36,0. Cocco­

lithus bam es ae B l a c k , Micula staurophora ( G a r d.); (H. S t r a d n e r , internal report).

E x p o s u r e no. '1988: seism ic shotpoint, ÖMV AG 107/8,0. A rk h an ­ gelskiella cymbiformis V e k s h . , Micula staurophora (G a r d .); (H.

S t r a d n e r , internal report).

Lower G reifenstein Beds

E x p o s u r e no. '1987: seism ic shotpoint Ö M V AG 108/42,0. Tro­

chamminoides folium ( G r z y b . ) , Placentammina grandis ( G r z y b . ) ; (K. T u r n o v s k y , internal report). Thoracosphaera deflandrei KPT., Coccolithus helis S t r a d, C. consuetus B r. & S u 11., C. crassus B r.

& S u 11. (H. S t r a d n e r , internal report).

Upper G reifenstein Beds

E x p o s u r e no. 1981: seism ic shotpoint, Ö M V AG 108/24,5. Disco- aster lodoensis B r. & R., D. barbadiensis T a n S i n H o k . (H. S t r a d ­ n e r , internal report),

d) L i t h o l o g y H e a v y m i n e r a l s :

Among the sam ples of sandstones from the Hagenbach area, which w ere checked for their heavy mineral contents, tw enty-three w ere found to contain more than 100 grains each. The results of these analyses are show n in table 1. In the low er tectonic slice four different groups of h eavy m ineral associations could be observed.

The W olfpassing Beds show a zircon-rutile maximum w ith little garnet present (first group). In the Wördern Beds as w ell as in the basal part of the Altlengbach Beds a m axim um of garnet w ith rutile is found

(second gröup).

The upper part of the A ltlengbach Beds and the Lower G reifenstein Beds have zircon more frequent than garnet and rutile, w hich are also numerous (third group).

The Upper G reifenstein Beds have a zircon-rutile-tourm aline m axi­

mum, w ith garnet being rare (fourth group).

It appears, that these four groups are connected w ith separate cycles of sedim entation. A distinct hiatus is to be seen betw een the W olfpassing and the Wördern Beds. During this stratigraphical break three tectonical phases must have occurred: the Austrian, the Pregosauian and the Sub- hercynian phase.

The Wördern Beds and the Lower A ltlengbach Beds form the next cycle. A fter these the Laramian phase appears to have followed, because in the Upper A ltlengbach Beds (Lower Paleocene) another heavy mineral association exists. As can be seen in exposures and outcrops at certain parts of the Hagenbach-Gorge, the Upper Altlengbach Beds and Lower G reifenstein Beds show gradual transition. Therefore these two com plex-

30 R o c z n i k G e o l o g i c z n y t o m X X X I X

— 466 -

es are to be considered as a new sedim entation cycle. A fter a weak tectonic phase, the last cycle follow s w ith the sedim entation of the Upper

G reifenstein Beds.

C a r b o n a t e C o n t e n t s :

The results of carbonate contents, analyses of 28 sandstones and 17 clay and clayey marl samples, are shown in table 2. A ll these samples w ere taken from exposures in the lower tectonic slice. The sandstones of the Lower G reifenstein Beds are rather poor in carbonate matrix or carbonate components. This is also the case in other areas of the flysch zone which are stratigraphically corresponding. The sandstones of the Upper Greifenstein Beds how ever often are cem ented w ith a carbonate

matrix.

The sandstones of th e Wordern Beds are also poor in carbonate ma­

trix. This is the reason w hy they are w eathering easily and therefore occasionaly they are m istaken for weathered G reifenstein Sandstones.

T a b l e 3 Expo­

sure no.

Beds

tecto­

nic slice

Expo­

sure no.

Beds

i tecto-j

nie J slice I 27

29 30 110 111 112 115 114 202 399 400 401 402

overl.: Lower Greifenstein B.

underl.:

Altlengbech B.

WHrdern B.

WHrdern B.

Altlengbach B.

Upper Greifenstein Upper Greifenstein Lower Greifenstein Altlengbach B.

Wolfpassing B.

Upper Greifenstein Upper Greifenstein Lower Greifenstein Lower Greifenstein

B.

B.

B.

B.

B.

B.

B.

1 1 1 1 u 1 1 1 1 1 1 1 1 1

1980 1981 1982 1984 1985 1986 1987 1988 1994 1996 2001 2007 2019

Altlengbach В.

Upper Greifenstein B.

Altlengbach ß.

Altlengbach B.

Altlengbach B.

Altlengbach B.

Lower Greifenstein B.

Altlengbach B.

Altlengbach B, Altlengbach B.

Altlengbach B.

Altlengbach B.

overl.:

Altlengbach B.

und erl.: Upper Greifenstein B,

1 ! u u u u u u u u u 1 u u u

403 Lower Greifenstein B. 1 2024 Wolfpassing B. 1 404 Lower Greifenstein B. 1 2025 Wolfpassing B.

405 Lower Greifenstein B. 1 2054 Würdern B.

406 Altlengbach B. 1 2057 Upper Greifenstein B. 1 1 i 662 Wolfpassing B. 1 2058 Upper Greifenstein B. 1 1 670 ’.Vördern B. 1 2059 Upper Greifenstein B.

671 Vv’ördern B. 1 2060 Upper Greifenstein

a.

1034 Altlengbach B. 1 2C55 Altlengbach B. u !

B. - Beds; overl. - overlying; underl. - underlying;

1 - lower; u - upper

— 467 -

The exposures m entioned in the text of this paper are in numerical sequence to facilitate finding them in the geological map (fig. 2). The names of the Bed and the tectonic slices from which sam ples w ere taken are listed (Table 3).

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— 468 -

L i e b u s A. (1938), O rbitella a piculata im W ien er w a ld fly sc h . Ver h. Geol. B u n d e s ­ a m t . , Nr 6, S. 143, W ien.

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P r e y S. (1965), V e r g leic h e n d e B e tr a ch tu n g en über W e stk a r p a te n und O stalpen im A n sc h lu s s an E x k u r sio n e n in die W estkarpaten. Ver h. Geol. Bu nd esa ns t. , H e ft 1/2, Wien.

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ZUSAMMENFASSUNG

Diese Arbeit über die Stratigraphie und Lithologie der Flyschsedi- m ente des Hagenbachgebietes ist die Ergänzung zu den paläontologischen Arbeiten von W. G r ü n - u n d H. S t r a d n e r , die im gleichen Band abgedruckt sind.

Die topographischen und tektonischen Kapitel werden von einer de­

taillierten Beschreibung jener A ufschlüsse gefolgt, die in den genannten paläontologischen Arbeiten behandelt werden. Frühere, aus der Literatur bekannte Fossilfunde, wurden bei der Aufschlußbeschreibung mit ange­

führt. Die Kartierungsarbeiten des Autors ergaben einen Schuppenbau in dieser nördlichsten tektonischen Einheit der nordalpinen Flyschzone („Greifensteiner Schuppenzone”). Die nördlichste und tiefste Schuppe zeigt ein stratigraphisches Profil, das von den unterkretazischen W olf- passinger Schichten, zu den Wörderner Schichten (Santon bis Campan),

— 4 6 9 —

den Altlengbacher Schichten (oberes Campan bis unteres Paleozän), den U nteren G reifensteiner Schichten (oberes Paleozän bis unteres U nter­

eozän) und den Oberen Greifensteiner Schichten (oberes Untereozän) reicht. Wie erwähnt, kann in den G reifensteiner Schichten ein unterer und oberer Kom plex voneinander getrennt werden. Zwischen diesen bei­

den Kom plexen wird eine schwache tektonische Phase angenommen.

An w eiteren Ergebnissen sind die Angaben über die Schw erm ineral­

führung zu nennen, die zeigten, daß sich die strukturelle und stratigra­

phische Schichtlücke zwischen den W olfpassinger Schichten mit einem Zirkonmaximum und den Wörderner Schichten m it einem Granatm axi­

mum m anifestiert. Innerhalb der Altlengbacher Schichten vollzieht sich ein langsam er Übergang in der Schwerm ineralassoziation von einem Granatmaxim um zu einem Zirkonmaximum mit noch starkem Granat­

anteil. Die Unteren G reifensteiner Schichten überlagern die A ltleng­

bacher Schichten konkordant und zeigen auch eine ähnliche Schw er­

m ineralvergesellschaftung.

Nach einer tektonischen Diskordanz folgen die Oberen Greifensteiner Schichten, die einen neuen Sedim entationszyklus darstellen und ein Zirkon-Rutil-Turm alin-M axim um haben (mit sehr w enig Granat). Die lithologischen Daten werden durch Angaben der Karbonatgehalte ergänzt.

Die oberkretazischen und paläogenen G esteine zeigen, daß in diesem Zeitraum die Flyschfazies vorherrschte, was z.B. durch das A uftreten von „graded bedding” und „convolute bedding” dem onstriert wird. Das Verhältnis zwischen dem A uftreten von Quarzareniten zu Tonen und Tonm ergeln beträgt im Hagenbachgebiet im Durchschnitt 4 :1 (Ober­

kreide — Untereozän).