ROGGENDORF-1 BOREHOLE, A KEY-SECTION FOR LOWER BADENIAN TRANSGRESSIONS AND THE STRATIGRAPHIC POSITION OF THE GRUND FORMATION (MOLASSE BASIN, LOWER AUSTRIA)
Published: Apr 2004
Pages: 165 - 178
Authors: STJEPAN CORIC, FRED ROGL
Abstract: Borehole Roggendorf-1 was drilled in the Alpine-Carpathian Foredeep (Molasse Basin) north of the Danube (Lower Austria). Biostratigraphic results and the lithological column revealed until now unrecorded Early Badenian (Middle Miocene) cycles. Calcareous nannoplankton was studied from the upper 800 m of a Neogene sequence and foraminifers were examined from the upper 410 m. The upper 2 m to 255 m fine clastic sediments of the Grund Formation (Lower Badenian, nannoplankton Zone NN5, planktonic foraminiferal Zone Mt6) show a deepening upward, with a maximum depth corresponding to outer shelf. Paleoecological evaluations demonstrate a distinct warming of the surface water. Down-hole, a clastic sequence follows starting with a gravel bed (347–360 m), and ending with a conglomerate bed on top (255–270 m). The latter is probably the transgressive base of the Grund Formation. The boundary of nannoplankton Zones NN 4–NN5 lies within this earlier Badenian cycle, which was deposited on the inner shelf, below 50 m. Limestone and sandstone pebbles originate from the Calcareous Alps and Flysch Unit. The underlying cycle of calcareous silty shales, sands and thin gravel layers belongs to the Laa Formation (Karpatian, nannoplankton Zone NN4; 360–612 m). Deposition occurred, partly under dysoxic bottom conditions on the outer shelf to upper bathyal. Surface waters were distinctly cooler than in the Grund Formation due to strong upwelling with nutrient enrichment. The Karpatian is underlain without a distinct unconformity by the Upper Ottnangian brackish Rzehakia (”Oncophora”) Beds, fine sands and shales, which are barren of fossils (612–678 m). The lower part of the investigated section belongs to the Ottnangian ” Robulus Schlier”. Nannoplankton determinations show that this still belongs to nannoplankton Zone NN4. Nannoplankton Zone NN3/4 is recorded on the basis of the occurrence of Sphenolithus belemnos only in the lowermost samples (790–800 m).
Keywords: Miocene, Alpine-Carpathian Foredeep, Grund Formation, Laa Formation, paleoecology, biostratigraphy, microfossils
Download PDF document
Volume 55 no. 2 / April 2004
REINHARD ROETZEL, PETER PERVESLER
STORM-INDUCED EVENT DEPOSITS IN THE TYPE AREA OF THE GRUND FORMATION (MIDDLE MIOCENE, LOWER BADENIAN) IN THE MOLASSE ZONE OF LOWER AUSTRIA
PETER PERVESLER, ALFRED UCHMAN
ICHNOFOSSILS FROM THE TYPE AREA OF THE GRUND FORMATION (MIOCENE, LOWER BADENIAN) IN NORTHERN LOWER AUSTRIA (MOLASSE BASIN)
PETER PERVESLER, MARTIN ZUSCHIN
A LUCINOID BIVALVE TRACE FOSSIL SARONICHNUS ABELI IGEN. ET ISP. NOV. FROM THE MIOCENE MOLASSE DEPOSITS OF LOWER AUSTRIA, AND ITS ENVIRONMENTAL SIGNIFICANCE
MARTIN ZUSCHIN, MATHIAS HARZHAUSER, OLEG MANDIC
TAPHONOMY AND PALEOECOLOGY OF THE LOWER BADENIAN (MIDDLE MIOCENE) MOLLUSCAN ASSEMBLAGES AT GRUND (LOWER AUSTRIA)
OLEG MANDIC
PECTINID BIVALVES FROM THE GRUND FORMATION (LOWER BADENIAN, MIDDLE MIOCENE, ALPINE-CARPATHIAN FOREDEEP) — TAXONOMIC REVISION AND STRATIGRAPHIC SIGNIFICANCE
STJEPAN CORIC, LILIAN SVABENICKA
CALCAREOUS NANNOFOSSIL BIOSTRATIGRAPHY OF THE GRUND FORMATION (MOLASSE ZONE, LOWER AUSTRIA)
SILVIA SPEZZAFERRI
FORAMINIFERAL PALEOECOLOGY AND BIOSTRATIGRAPHY OF THE GRUND FORMATION (MOLASSE BASIN, LOWER AUSTRIA)
STJEPAN CORIC, FRED ROGL
ROGGENDORF-1 BOREHOLE, A KEY-SECTION FOR LOWER BADENIAN TRANSGRESSIONS AND THE STRATIGRAPHIC POSITION OF THE GRUND FORMATION (MOLASSE BASIN, LOWER AUSTRIA)
IRENE ZORN
OSTRACODA FROM THE LOWER BADENIAN (MIDDLE MIOCENE) GRUND FORMATION (MOLASSE BASIN, LOWER AUSTRIA)
GUDRUN DAXNER-HOCK, PETRA M. MIKLAS-TEMPFER, URSULA B. GOHLICH, KATI HUTTUNEN, EMESE KAZAR, DORIS NAGEL, GERTRUD E. ROESSNER, ORTWIN SCHULTZ, REINHARD ZIEGLER
MARINE AND TERRESTRIAL VERTEBRATES FROM THE MIDDLE MIOCENE OF GRUND (LOWER AUSTRIA)
ROBERT SCHOLGER, KARL STINGL
NEW PALEOMAGNETIC RESULTS FROM THE MIDDLE MIOCENE (KARPATIAN AND BADENIAN) IN NORTHERN AUSTRIA
STJEPAN CORIC, MATHIAS HARZHAUSER, JOHANN HOHENEGGER, OLEG MANDIC, PETER PERVESLER, REINHARD ROETZEL, FRED ROGL, ROBERT SCHOLGER, SILVIA SPEZZAFERRI, KARL STINGL, LILIAN SVABENICKA, IRENE ZORN, MARTIN ZUSCHIN
STRATIGRAPHY AND CORRELATION OF THE GRUND FORMATION IN THE MOLASSE BASIN, NORTHEASTERN AUSTRIA (MIDDLE MIOCENE, LOWER BADENIAN)