Testing the terrestrial δ13C Cretaceous–Paleogene (K–Pg) chemostratigraphic marker

Autor:	David E. Fastovsky, Andrew J. Schauer, Anne I. Veeger, Rachel Grandpre, Kyle Samek, Peter D. Ward
Rok vydání:	2013
Předmět:	geography Extinction geography.geographical_feature_category δ13C Paleontology Context (language use) Oceanography Cretaceous Butte Chemostratigraphy Stratigraphic section Paleogene Ecology Evolution Behavior and Systematics Geology Earth-Surface Processes
Zdroj:	Palaeogeography, Palaeoclimatology, Palaeoecology. :67-75
ISSN:	0031-0182
DOI:	10.1016/j.palaeo.2013.04.015
Popis:	Multiple > 1‰ δ13C isotopic excursions measured across the Cretaceous–Paleogene (K–Pg) boundary in an iridium-bearing stratigraphic section from Mud Buttes, North Dakota, USA, fail to demonstrate an unambiguous chemostratigraphic signal for the extinction. Results of two-sample Kolmogorov–Smirnov tests using δ13C records for the Mud Buttes section as well as five other published K–Pg sections from Montana, North Dakota, Wyoming, and Canada – all of which report a − 1.0‰ to − 2.8‰ chemostratigraphic marker at or just above the extinction – demonstrate that it may not be possible to distinguish a statistically meaningful isotopic shift to lower δ13C values at the boundary in the context of background variations. Carbon isotopes as terrestrial chemostratigraphic markers of the K–Pg extinction boundary are thus of limited utility.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::c4321b8090e59b57c061a4c11fd6a369 https://doi.org/10.1016/j.palaeo.2013.04.015 Zobrazit plný text záznamu Full Text from ScienceDirect