Recognition of a likely two phased extinction at the K-Pg boundary in Antarctica.

ABSTRACT: The southernmost Cretaceous - Paleogene (K-Pg) outcrop exposure is the well-studied exposure on Seymour Island, Antarctica. Deposition across the K-Pg boundary there is uninterrupted, and as a consequence the ammonite fossil record is commonly used to test statistical methods of evaluating mass extinctions to account for the incompleteness of the fossil record. Numerous detailed fossil data sets from Seymour Island, comprised dominantly of mollusks, have been published over the last 30 years, but in most cases have not received statistical treatment. Here a previously published statistical technique is modified, automated, and applied to all published macrofossil data sets available from Seymour Island. All data sets reveal likely evidence of two separate multi-species extinctions, one syn

SUBMITTER: Tobin TS 

PROVIDER: S-EPMC5701184 | biostudies-literature | 2017 Nov

REPOSITORIES: biostudies-literature