Studia Geologica Polonica  vol. 115 (Abstracts)

Jurassic (Upper Bajocian-lowest Oxfordian) ammonitico rosso facies in the Pieniny Klippen Belt, Carpathians, Poland: its fauna, age, microfacies and sedimentary environment

Andrzej WIERZBOWSKI*, Magdalena JAWORSKA* & Michał KROBICKI**

Abstract
The studied sections of the lower part of the Czorsztyn Limestone Fm. in the Czorsztyn Succession (Obłazowa Klippe, Czorsztyn Castle Klippe, and Krupianka Creek), and of the Niedzica Limestone Fm. in the Niedzica Succession (Niedzica-Podmajerz Klippe, Czajakowa Skała) in central and eastern parts of the Pieniny Klippen Belt in Poland have yielded ammonite faunas of Late Bajocian to Late Callovian/Early Oxfordian age. The cessation of the crinoid limestones deposition, and the onset of sedimentation of the ammonitico rosso-type limestones took place already in the Garantiana Chron, as proved by ammonite findings in the Niedzica Succession. The oldest recognised ammonitico rosso-type limestones in the Czorsztyn Succession correspond to late Parkinsoni Chron of the latest Bajocian. The dominance of thin-shelled pelecypods of the genus Bositra is typical of the ammonitico rosso-type deposits of late Middle Jurassic age in the study area. Two microfacies are distinguished here: the filament microfacies sensu stricto, and the filament-juvenile gastropod microfacies. The youngest deposits studied of the ammonitico rosso-type, of latest Callovian and/or Early Oxfordian ages, are developed either as the Globuligerina (“Protoglobigerina”) microfacies (in the Czorsztyn Succession, and some sections of the Niedzica Succession), or as the radiolarian microfacies (in the Niedzica Sucession). Two turnovers in sedimentation which occurred from the Late Bajocian to latest Callovian/ Early Oxfordian include: (1) a passage from the crinoid limestones to the ammonitico rosso-type limestones related to the Meso-Cimmerian faulting and subsiding of the Czorsztyn Ridge during Late Bajocian, (2) a passage from the deposits of the ammonitico rosso-type rich in filaments to those containing abundant planktonic organisms of the Globuligerina microfacies, and of the radiolarian microfacies. The latter, possibly induced by the tectonic factors, resulted mostly from a marked change in oceanic circulation in the northern part of the Tethys, at the turn of the Callovian and Oxfordian. In the paleontological part of the paper, the most important ammonite and brachiopod species, mostly of Late Bajocian and Bathonian ages, are described and illustrated.

Studia Geologica Polonica, 115: 75-90.

L. Horwitz’s collection of Cretaceous marine fossils (mainly bivalves and belemnites) from the Pieniny Klippen Belt, Carpathians

Krzysztof BIRKENMAJER* & Bronisława KOKOSZYŃSKA

Abstract
The paper presents a list of Cretaceous fossils, mainly bivalves and belemnites, from the Polish and Slovak parts of the Pieniny Klippen Belt, Carpathians. The fossils were collected and determined by Dr L. Horwitz in the years 1924-1939, and revised by Prof. B. Kokoszyńska in 1957. The list of fossils is supplemented with comments by K. Birkenmajer on geographical location and geological position of the specimens, using modern lithostratigraphic standards of the Pieniny Klippen Belt.

Studia Geologica Polonica, 115: 91-115.

Cretaceous Radiolaria from the Pieniny Succession, Pieniny Klippen Belt, Polish Carpathians

Marta BĄK

Abstract
This paper summarises investigations on radiolarian faunas from the Cretaceous deposits of the Pieniny Succession, Pieniny Klippen Belt, Polish Carpathians. Twenty one species of Radiolaria from the Upper Albian through the Coniacian deposits have been determined. The species determined belong to the orders Nassellaria (13 species) and Spumellaria (8 species). The assemblage analysed is dominated by spherical cryptothoracic and cryptocephalic Nassellaria, such as Holocryptocanium barbui Dumitrică, Hemicryptocapsa tuberosa Dumitrică, H. polyhedra Dumitrică, H. prepolyhedra Dumitrică, and Squinabollum fossile (Squinabol). This assemblage represents three radiolarian biozones: the Holocryptocanium barbui, the Hemicryptocapsa prepolyhedra and the Hemicryptocapsa polyhedra zones.

Studia Geologica Polonica, 115: 117-130.

Stages of structural evolution of the Niedzica Castle tectonic window, Pieniny Klippen Belt, Carpathians, Poland

Krzysztof BIRKENMAJER

Abstract
Four stages of structural evolution of the Niedzica Castle tectonic window (Pieniny Klippen Belt, West Carpathians, Poland) are distinguished. The first two stages include: (1) the late-Subhercynian (Campanian) nappe folding; and (2) the Laramian (Early Paleocene) refolding of the nappes and their sedimentary cover (Maastrichtian Jarmuta Fm.). The next two stages include: (3) piling up of older structures (1, 2) during the compressive/transpressive Savian phase (Early Miocene); (4) fragmentation of older structures (1-3) by a strike-slip fault system of Late Miocene (Sarmatian) age.

Studia Geologica Polonica, 115: 131-138.

Correlation of the Subtatric tectonic units south of Zakopane (Polish Tatra Mts)

Maria BAC-MOSZASZWILI & Jerzy LEFELD

Abstract
Tectonic units of the lower Subtatric nappe were correlated between the western and eastern parts of the Tatra Mts. It was found that the Mała Świnica unit does not continue toward the east beyond the western slopes of the Dolina Białego valley. North of the Krokiew tectonic scale, there is another unit called the Jastrzębia Turnia scale which, most probably, is a western continuation of the Jastrzębia Turnia-Palenica partial nappe. Fragments of the Middle and Upper Triassic and Lower Liassic rocks, exposed in tectonically reversed position under the Krokiew scale and the Mała Świnica unit, are classified to the Bielske Tatry partial nappe on the basis of identity of their lithostratigraphic sequences and facies development of the Fatra Formation. The so called “Czerwona Przełęcz syncline” thus loses its tectonic meaning: it should be eliminated from the tectonic nomenclature of the Subtatric zone.

Studia Geologica Polonica, 115: 139-166.

Tectonics of the Subtatric Units, Eastern Tatra Mts

Jerzy LEFELD

Abstract
Three partial nappes occur within the Subtatric zone in the eastern part of the Tatra Mts. These are (from base to top or from south to north respectively): (1) the lower Subtatric partial nappe sensu stricto corresponding to the Suchy Wierch unit of the Zakopane Subtatric area, (2) the Bielskie Tatry partial nappe (= the Hawrań digitation of Sokołowski, 1950) and (3) the Jastrzębia Turnia-Palenica partial nappe (= the Bujaczy digitation of Andrusov, 1936). Their lithostratigraphic completeness and tectonic character differ depending on their situation on transversal elevations and/or depressions, respectively. At the Hawrań-Jagnięcy elevation only the Bielskie Tatry nappe is more or less completely preserved. It is thrust onto the tectonically reduced Middle Triassic of the lower Subtatric nappe. The Bielskie Tatry nappe is superposed by the Jastrzębia Turnia-Palenica nappe which contains the Middle-Upper Triassic members and the Fatra Formation. Farther west, in the Szeroka Jaworzyńska depression (in the Jaworzyna subtatric area), the lower Subtatric nappe is represented by two tectonic scales, namely the Holica-Zadnia Kopa and the Czerwona Skałka ones. Both units show but a part of the Middle Triassic carbonate sequence, and a complete Jurassic and Lower Cretaceous sequence (the latter is reduced at its top). These lower Subtatric scales are overlaid by the Tatry Bielskie nappe and this, in turn, by the Jastrzębia Turnia-Palenica partial nappe. On the Koszysta transversal elevation, still farther west, the lower Subtatric nappe is reduced to a few very small scales. It is overlaid there by a tectonically overturned Kopy Sołtysie unit, a part of the Bielskie Tatry nappe. The Kopy Sołtysie unit is tectonically covered by the Triassic carbonates of the Jastrzębia Turnia-Palenica partial nappe along the line: Gęsia Szyja - Filipczański Wierch. A continuation of the lower Subtatric nappe eastward, up to the Jaworowa Valley, is documented. The Triassic formations cropping out at Filipczański Wierch, Gęsia Szyja, Łysa Skałka, and Wierch Skałki are included to the Jastrzębia Turnia-Palenica partial nappe. Tectonic affiliation of several small tectonic scales of the Križna nappe (sensu lato) in the Gęsia Szyja-Kopy Sołtysie area remains an open question.