T179 Impact Cratering: From Fire to Ice—Cratering across the Solar System (Posters)

Monday, 23 October 2017
9:00 AM - 6:30 PM
Halls 4EF

MULTI-PROXY CRETACEOUS-PALEOGENE BOUNDARY EVENT STRATIGRAPHY: THE GUBBIO AND OTHER UMBRIA-MARCHE BASIN SECTIONS

Paper number: T179-9
Program: Technical Sessions
Time: 9:00 AM – 6:30 PM

Authors

Abstract

The classical sections of Gubbio are well-known from a variety of studies, especially from the pioneering work done in the fields of biostratigraphy, magnetostratigraphy and the Cretaceous-Paleogene boundary (K-Pg B). This study aims to investigate the event stratigraphy related to the K-Pg B transition in the pelagic carbonate sections of the Umbria-Marche basin, including the Gubbio sections. The selected stratigraphical interval contains various events such as the second and third Deccan volcanic phase, the K-Pg B impact, the post mass extinction recovery and the beginning of the occurrence of the Paleogene hyperthermals.

Existing high-resolution (cm-scale) proxy series (magnetic susceptibility, calcium carbonate content, bulk carbonate δ18O and δ13C) for the Gubbio sections of the Bottaccione Gorge and the Contessa Highway were complemented with elemental data acquired by portable X-ray fluorescence (XRF), 87Sr/86Sr and 187Os/188Os isotope ratio’s. In addition, analogue sections in the Umbria-Marche Basin were selected (mainly “the Morello section”) to carry out parallel proxy measurements in order to compare the reproducibility of proxy series inside the basin itself.

Geological Society of America Abstracts with Programs. Vol. 49, No. 6

doi: 10.1130/abs/2017AM-302965

© Copyright 2017 The Geological Society of America (GSA), all rights reserved. Permission is hereby granted to the author(s) of this abstract to reproduce and distribute it freely, for noncommercial purposes. Permission is hereby granted to any individual scientist to download a single copy of this electronic file and reproduce up to 20 paper copies for noncommercial purposes advancing science and education, including classroom use, providing all reproductions include the complete content shown here, including the author information. All other forms of reproduction and/or transmittal are prohibited without written permission from GSA Copyright Permissions.