Unknown
PANGAEA
In:
Supplement to: Ravizza, Gregory E; Peucker-Ehrenbrink, Bernhard (2003): Chemostratigraphic Evidence of Deccan Volcanism from the Marine Osmium Isotope Record. Science, 302(5629), 1392-1395, https://doi.org/10.1126/science.1089209
Publication Date:
2024-07-02
Description:
Continental flood basalt (CFB) volcanism is hypothesized to have played a causative role in global climate change and mass extinctions. Uncertainties associated with radiometric dating preclude a clear chronological assessment of the environmental consequences of CFB volcanism. Our results document a 25% decline in the marine 187Os/188Os record that predates the Cretaceous-Tertiary boundary (KTB) and coincides with late Maastrichtian warming. We argue that this decline provides a chemostratigraphic marker of Deccan volcanism and thus constitutes compelling evidence that the main environmental consequence of Deccan volcanism was a transient global warming event of 3° to 5°C that is fully resolved from the KTB mass extinction.
Keywords:
25-245; 74-525A; 86-577_Site; AGE; COMPCORE; Composite Core; Deep Sea Drilling Project; Depth, relative; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Event label; Glomar Challenger; Indian Ocean//BASIN; Leg25; Leg74; Leg86; Negative-thermal ionization mass spectrometry (N-TIMS); North Pacific; Osmium; Osmium-187/Osmium-188, error; Osmium-187/Osmium-188 ratio; Sample code/label; South Atlantic/CREST
Type:
Dataset
Format:
text/tab-separated-values, 109 data points
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