An Introduction to Causes and Consequences of Cretaceous Sea-Level Changes (IGCP 609)

Autor(en)

Michael Wagreich, Benjamin Sames, Malcolm Hart, Ismail Ömer Yilmaz

Abstrakt

The International Geoscience Programme Project IGCP 609 addressed correlation, causes and consequences of short-term sea-level fluctuations during the Cretaceous. Processes causing several ka to several Ma (third-to fourth-order) sea-level oscillations during the Cretaceous are so far poorly understood. IGCP 609 proved the existence of sea-level cycles during potential ice sheet-free greenhouse to hothouse climate phases. These sea-level fluctuations were most probably controlled by aquifer-eustasy that is altering land-water storage owing to groundwater aquifer charge and discharge. The project investigated Cretaceous sea-level cycles in detail in order to differentiate and quantify both short-and long-term records based on orbital cyclicity. High-resolution sea-level records were correlated to the geological timescale resulting in a hierarchy of sea-level cycles in the longer Milankovitch band, especially in the 100 ka, 405 ka, 1.2 Ma and 2.4 Ma range. The relation of sea-level highs and lows to palaeoclimate events, palaeoenvironments and biota was also investigated using multiproxy studies. For a hothouse Earth such as the mid-Cretaceous, humid–arid climate cycles controlling groundwater-related sea-level change were evidenced by stable isotope data, correlation to continental lake-level records and humid–arid weathering cycles.

Organisation(en)

Institut für Geologie

Externe Organisation(en)

Plymouth University , Middle East Technical University, Ankara Üniversitesi

Journal

Geological Society Special Publications

Band

498

Seiten

1-8

Anzahl der Seiten

8

DOI

https://doi.org/10.1144/SP498-2019-156

Publikationsdatum

2020

Peer-reviewed

Ja

ÖFOS 2012

105204 Klimatologie, 105121 Sedimentologie, 105123 Stratigraphie, 105306 Ozeanographie

Schlagwörter

ASJC Scopus Sachgebiete

Water Science and Technology, Ocean Engineering, Geology

Sustainable Development Goals

SDG 13 – Maßnahmen zum Klimaschutz

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/a917a8b1-89e6-4c8f-a005-d87ec5e44a42