SUMMARY
The paper presents the results of studies on the microfaWla from core material of ,the Miocene drilled in the RozwadOw, Mielec and Sandomierz areas. The sWdies also comprised the microfauna present in clays intercalating chemical Miocene deposits penetrated by Jamnica 0-15, Jamnica L-21, Opalona G6ra L-12, stalowa Wola S-15 and Stu-dzieniec D-16 drllllngs. The oldest deposits of that region, previously assigned to IOadnica Beds (Mio-cene M,), are characterized by the microfauna of the brackish type and with the predominance of
the species Ammonia beccarii. They are represented
by dark 'non-calcareOUB clays with pyrite. The younger deposits ipclude: Lithothamnium
limesto-nes and marls and Nullipara sandstones and
silts-tones characterized by numerous 'foraminifers of the genera AmphiBtegina, Elphidi'um and Cibicidoilks.
The microfauna is here marlted,ly scarcer than in
typical zone with OrbuUna suturalis, distinguished
in LO'lVer Badenian Baran6w sandstones and marls. The upper part of the Badenian .is represented by slltstone marly and sandy clayey deposits with glau-conite and rich foraminifer assemblage including guide species pvi,gerina costai. The Badeniafl strata
oocumln!, above the Chemical deposits in this area are assigned
to
the NeobuZimtna longa and Hanza-waia crassiseptata zones. The zones comprise a se-ries of alterna.ting marly clays and blocky ~ls. The Sarmatian is primarily represented by the deposits of siltstone-mady facies and it may be divided in-to the Anomalinoide8 dividen8, Cycloforina karreri ovata, Varidentella sarmatica and Elphi-diuffl hauerinum zones. '!'he most interesting results
of the present study ,include the finds of the micro-fauna with Ammonia beccari analogoWl to that
Im()WIIl from KlOOnica Beds (Miocene Ma> in the basal parts of the borehole sections and of the assemblages of innumerous foraminifers in the clays Interca:tatig chemical Miocene deposits. Up to the' present the clay intercalations were considered to
be faunisticallly barren except for fish remainS. Lower and Upper ,Badenian and Sarmatian fora-minUer zones distinguished here a.ppear
to
be com-parable with contemporaneous zones distinguishedIn the areas of the U.S.S.R. ' and Czechoslovakia.
PB310ME
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