AGE OF THE GUATEMALA BRECCIAS AROUND THE CRETACEOUS-TERTIARY BOUNDARY- RELATIONSHIPS WITH THE ASTEROID IMPACT ON THE YUCATAN

Authors
FOURCADE E ROCCHIA R GARDIN S BELLIER JP DEBRABANT P MASURE E ROBIN E POP WT
Citation
E. Fourcade et al., AGE OF THE GUATEMALA BRECCIAS AROUND THE CRETACEOUS-TERTIARY BOUNDARY- RELATIONSHIPS WITH THE ASTEROID IMPACT ON THE YUCATAN, Comptes rendus de l'Academie des sciences. Serie 2. Sciences de la terre et des planetes, 327(1), 1998, pp. 47-53
Citations number
25
Categorie Soggetti
Geosciences, Interdisciplinary
Journal title
Comptes rendus de l'Academie des sciences. Serie 2. Sciences de la terre et des planetes → ACNP
ISSN journal
12518050
Volume
327
Issue
1
Year of publication
1998
Pages
47 - 53
Database
ISI
SICI code
1251-8050(1998)327:1<47:AOTGBA>2.0.ZU;2-P
Abstract
The upper part of the near K/T boundary limestone breccia deposits whi ch crop out in Guatemala near 16 degrees N contains impact remains: al tered glass spherules (tektites) and elevated concentrations of iridiu m. This suggests that these deposits could result from the impact of t he K/T boundary asteroid on the Yucatan. However, their matrix contain s foraminifers of the Eugubina Zone and calcareous nannofossils of the CP1a Zone, an association characterizing Early (but not the earliest) Danian. This unusual assemblage of K/T and Danian components suggests that the upper part of the breccia was reworked several thousands of years after the K/T event. ((C) Academie des sciences / Elsevier, Pari s.)