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DEPOSITIONAL ENVIRONMENT OF THE "OLD RED" SEDIMENTS IN THE BRNO AREA (SOUTH-EASTERN PART OF THE RHENOHERCYNIAN ZONE, BOHEMIAN MASSIF)

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• Volume 52 No.4 / August 2001

Published: Aug 2001

Pages: 195 - 203

Authors: SLAVOMIR NEHYBA, JAROMIR LEICHMANN, JIRI KALVODA

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.

Keywords: Early Paleozoic, monomict-quartzose clastics, conglomerates, sheetfloods

Volume 52 no. 4 / August 2001

• SLAVOMIR NEHYBA, JAROMIR LEICHMANN, JIRI KALVODA

  DEPOSITIONAL ENVIRONMENT OF THE "OLD RED" SEDIMENTS IN THE BRNO AREA (SOUTH-EASTERN PART OF THE RHENOHERCYNIAN ZONE, BOHEMIAN MASSIF)

• JIRI KALVODA

  UPPER DEVONIAN–LOWER CARBONIFEROUS FORAMINIFERAL PALEOBIOGEOGRAPHY AND PERIGONDWANA TERRANES AT THE BALTICA-GONDWANA INTERFACE

• BARBARA OLSZEWSKA, JOZEF WIECZOREK

  JURASSIC SEDIMENTS AND MICROFOSSILS OF THE ANDRYCHOW KLIPPES (OUTER WESTERN CARPATHIANS)

• OVIDIU DRAGASTAN, MILAN MISIK

  NON-MARINE LOWER CRETACEOUS ALGAE AND CYANOBACTERIA FROM THE CZORSZTYN UNIT, WESTERN CARPATHIANS

• DAVIDE LENAZ, ANTONIO ALBERTI, GIORGIO TUNIS, FRANCESCO PRINCIVALLE

  A HEAVY MINERAL ASSOCIATION AND ITS PALEOGEOGRAPHICAL IMPLICATIONS IN THE EOCENE BRKINI FLYSCH BASIN (SLOVENIA)

• CEMAL TUNOGLU, CUNEYT BILEN

  BURDIGALIAN–LANGHIAN (MIOCENE) OSTRACOD BIOSTRATIGRAPHY AND CHRONO-STRATIGRAPHY OF THE KASABA BASIN (KAS/ANTALYA), SW TURKEY