Late Maastrichtian age of spherule deposits in northeastern Mexico: implication for Chicxulub scenario

TitleLate Maastrichtian age of spherule deposits in northeastern Mexico: implication for Chicxulub scenario
Publication TypeJournal Article
Year of Publication2001
AuthorsStinnesbeck, W, Schulte, P, Lindenmaier, F, Adatte, T, Affolter, M, Schilli, L, Keller, G, üben, D, Berner, Z, Kramar, U, Burns, SJ, ópez-Oliva, JG
JournalCanadian Journal of Earth Sciences
Volume38
Issue2
Pagination229 - 238
Date PublishedJan-02-2001
ISSN0008-4077
Abstract

In the La Sierrita area of Nuevo Leon, Mexico, three spherule layers are present and separated from the overlying siliciclastic deposits by up to 6 m of pelagic marls. The marls are of latest Maastrichtian age (Plummerita hantkeninoides (CF1) Zone, Micula prinsii Zone) and deposited under normal pelagic conditions with no significant evidence of reworking or slumping. Original deposition of the spherule layers occurred during the last 300 ka of the Maastrichtian and well prior to the Cretaceous–Tertiary (K–T) boundary event. Thus, if the spherules in northeastern Mexico provide critical evidence of an impact at Chicxulub, this impact predates the K–T boundary.  PDF

URLhttp://www.nrcresearchpress.com/doi/abs/10.1139/e00-061
DOI10.1139/e00-061
Short TitleCan. J. Earth Sci.