Contents
STABLE ISOTOPE EVIDENCE FOR METER-SCALE SEA LEVEL CHANGES IN LOWER CRETACEOUS INNER PLATFORM AND PELAGIC CARBONATE SUCCESSIONS OF TURKEY
Published: Feb 2004
Pages: 19 - 36
Authors: ISMAIL OMER YILMAZ, TORSTEN VENNEMANN, DEMIR ALTINER, MUHARREM SATIR
Abstract: In this study, stable C and O isotope compositions of bulk rock samples from Barremian-Aptian platform carbonates of the Taurides, the Pontides, and of their pelagic counterparts of the Sakarya continent in Turkey were measured for the first time. Platform carbonates and pelagic successions including a prominent black shale interval are composed of distinct sedimentary cycles in the form of meter-scale shallowing- upward sequences and limestone-marl/shale couplets, respectively. The biostratigraphy and the δ13C values allow this black shale interval to be correlated with the "Selli level". Variations in lithofacies and δ13C and δ18O values with the magnitudes of about 2 ‰ within the cycles indicate high frequency fluctuations in sea level, probably in response to alternate periods of cooling and warming occurring on Milankovitch-cycle scales even during the greenhouse-type Cretaceous. A good overall correlation between sedimentary cyclicity and variations in δ18O values suggests preservation of the primary isotopic signal.
Keywords: Barremian, Aptian, Taurides, Pontides, Sakarya, stable isotopes, cyclicity
Download PDF documentVolume 55 no. 1 / February 2004
DAMIR BUCKOVIC, BLANKA CVETKO TESOVIC, IVAN GUSIC
LATE JURASSIC PALEOENVIRONMENTAL EVOLUTION OF THE WESTERN DINARIDES (CROATIA)ISMAIL OMER YILMAZ, TORSTEN VENNEMANN, DEMIR ALTINER, MUHARREM SATIR
STABLE ISOTOPE EVIDENCE FOR METER-SCALE SEA LEVEL CHANGES IN LOWER CRETACEOUS INNER PLATFORM AND PELAGIC CARBONATE SUCCESSIONS OF TURKEYRICHARD STORC
THE OPHIUROID AMPHIURA? PLANA IN NEARSHORE SETTINGS OF THE BOHEMIAN CRETACEOUS BASIN (CZECH REPUBLIC)KALMAN BENEDEK, ZOLTAN PECSKAY, CSABA SZABO, JOZSEF JOSVAI, TIBOR NEMETH
PALEOGENE IGNEOUS ROCKS IN THE ZALA BASIN (WESTERN HUNGARY): LINK TO THE PALEOGENE MAGMATIC ACTIVITY ALONG THE PERIADRIATIC LINEAMENTFRANCESCO GUERRERA, MICHELE MATTIOLI, FRANCISCO SERRANO, MARIO TRAMONTANA, GIULIANA RAFFAELLI
STRATIGRAPHY OF THE MIOCENE SYN-RIFT VOLCANO-SEDIMENTARY SUCCESSION IN A SECTOR OF THE CENTRAL-SOUTHERN SARDINIA TROUGH ( ITALY)ROSALINA STANCHEVA, DOBRINA TEMNISKOVA
PALEOECOLOGY OF HOLOCENE DIATOMS FROM SPHAGNUM PEAT BOGS IN THE CENTRAL SREDNA GORA MOUNTAINS (BULGARIA)JOZEF CHOWANIEC
HYDROGEOLOGICAL PROPERTIES OF THE PODHALE FLYSCH (CENTRAL WESTERN CARPATHIANS, POLAND) IN THE LIGHT OF STUDIES ON WATER STORAGE CAPACITY