DEPOSITIONAL ENVIRONMENT OF THE "OLD RED" SEDIMENTS IN THE BRNO AREA (SOUTH-EASTERN PART OF THE RHENOHERCYNIAN ZONE, BOHEMIAN MASSIF)
Abstract: Lower Devonian monomict-quartzose coarse-grained clastics near Brno (on the Cerveny kopec Hill) are interpreted as the deposits of an alluvial fan built up mainly by catastrophic sheetfloods. The main sources were probably granites and gneisses, other components were derived from rhyolites, older siliciclastic sediments and low-grade metamorphic rocks. Abundant presence of muscovite reflects some role of an exotic source area. Rapid uplift, erosion dominated by mechanical weathering and multiple redeposition are supposed within the drainage basin. The flat alluvial fan was only slightly reworked and eroded during subsequent non-catastrophic overland flows (secondary processes). A relatively mature stage of the evolution of the alluvial fan and drainage basin was accepted. A continental extensional basin represents the most probably depositional setting of the studied deposits.
UPPER DEVONIAN–LOWER CARBONIFEROUS FORAMINIFERAL PALEOBIOGEOGRAPHY AND PERIGONDWANA TERRANES AT THE BALTICA-GONDWANA INTERFACE
Abstract: A new paleobiogeographic subdivision of the Perigondwana terranes is based on the study of Upper Devonian and Lower Carboniferous calcareous foraminifers. The Brunovistulian, Moesian and Zonguldak terranes in Central and SE Europe and Asia Minor (the Brunovistulian group of terranes) show close paleobiogeographic relationships to the East European foraminiferal association. Consequently, they are regarded as a part of the Fennosarmatian Province which represented a centre for the diversification for most groups of Upper Devonian and Lower Carboniferous calcareous foraminifers. A lower degree of similarity with the East European Platform can be distinguished in the East Avalonian foraminiferal fauna while that of the Armorican group of terranes displays distinct differences constituting the separate Armorican Province. The results obtained support the idea that the Brunovistulian group of terranes formed the southern margin of Laurussia which was colliding with the Armorican group of terranes during the Variscan orogeny. In this respect, Brunovistulian group of terranes held a geotectonic position similar to that of East Avalonia even though the accretionary history of the terranes was different.
JURASSIC SEDIMENTS AND MICROFOSSILS OF THE ANDRYCHOW KLIPPES (OUTER WESTERN CARPATHIANS)
Abstract: Shallow-water carbonate Jurassic sediments of the Andrychów Klippes (Inwald, Panska Góra, Targanice and Roczyny klippes) differ in origin and environment of deposition from the surrounding flysch complexes. In Jurassic paleogeography they represented a marginal part of the European Plate (Golonka et al. 2000), the morphology of which was characterized by the presence of elevated blocks, separated by basins. During Alpine north-directed movements, several blocks were detached from the continent and incorporated into flysch sediments, mainly in the front of the Silesian Nappe. Oxfordian cherty limestones of Andrychów Klippes show significant similarities to coeval sediments deposited on Eurasia’s southern margin. The Tithonian shallow-water limestones with abundant nerineacean-diceratid-coral fauna, numerous algae (dasycladales, codiaceans, solenoporeaceans), foraminifers (lituolids, miliolids, involutinids) and calcareous dinocysts show similarities to the Stramberk limestones, and remnants of carbonate sediments of the European Plate which occur as blocks and exotics in flysch deposits of the Outer Carpathians.
NON-MARINE LOWER CRETACEOUS ALGAE AND CYANOBACTERIA FROM THE CZORSZTYN UNIT, WESTERN CARPATHIANS
Abstract: Rare non-marine, Lower Cretaceous algae belonging to genera Broutinella Freytet, Plaziatella Freytet, Toutinella Freytet, Koeniguerella Freytet and Wallnerella Freytet were described. New taxa are introduced: Toutinella lednicae n.sp., T. freyteti n.sp., Wallnerella reticulata n.sp., Koeniguerella cretacea n.sp., and Dubrovnikiella slovakiensis n.sp.
A HEAVY MINERAL ASSOCIATION AND ITS PALEOGEOGRAPHICAL IMPLICATIONS IN THE EOCENE BRKINI FLYSCH BASIN (SLOVENIA)
Abstract: The heavy mineral assemblages of the Brkini Flysch Basin (Western Slovenia) have been studied in some detail, and new minerals, hitherto not mentioned in the literature have been found. Among these, Cr-spinels, ilmenites and one orthopyroxene were recognized. All of them were chemically characterized. Chemical analyses on garnets have been carried out in order to discriminate between different end-members and they turned out to be similar to those found in both the Julian (Slovenian) and Istrian basins located to the NW and SE of Brkini, respectively. The chemistry of Cr-spinels suggests that both peridotitic (type-II and minor type-I peridotites Cr-spinels) and volcanic spinels are present. This fact suggests that the Outer Dinarides of former Yugoslavia, where type-I peridotites are present, began to be eroded by Middle Eocene. Moreover, similarities between the minerals of Brkini and those of the Julian and Istrian basins show that supplies from both the NW and the SE areas are present.
BURDIGALIAN–LANGHIAN (MIOCENE) OSTRACOD BIOSTRATIGRAPHY AND CHRONO-STRATIGRAPHY OF THE KASABA BASIN (KAS/ANTALYA), SW TURKEY
Abstract: In this investigation, 205 samples were collected from five measured stratigraphic sections in the Kasaba Basin (Kas/Antalya, SW Turkey) and 16 genera and 33 species of ostracodes were identified. Three different biozones have been recognized on the basis of the stratigraphic and geographic distribution of ostracod fauna in the measured sections which are, from bottom to top, as follows: 1. Early-Middle Burdigalian age, Cytherella triestina Zone, 2. Late Burdigalian-Early Langhian age, Aurila soummamensis-Krithe papillosa Zone, 3. Langhian age, Cytherella vulgata-Xestoleberis reymenti Zone. These zones have been correlated with the well known and widespread Neomonoceratina helvetica and Aurila soummamensis Zones of other Turkish and Mediterranean Basins. The chronostratigraphic Burdigalian-Langhian correlation of the sequence has been established mainly by Ostracoda assemblages. The results are integrated with the other faunal and floral occurrences observed during the investigation, which include planktonic and benthonic foraminifers, nannoplankton, Bivalvia, Gastropoda and corals. Thus, the Burdigalian (early, middle, late) and Langhian stage boundary has been biostratigraphically identified.