Late Maastrichtian age of spherule deposits in northeastern Mexico: implication for Chicxulub scenario
Détails
ID Serval
serval:BIB_244B47BDE01F
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
Late Maastrichtian age of spherule deposits in northeastern Mexico: implication for Chicxulub scenario
Périodique
Canadian Journal of Earth Sciences
ISSN-L
0008-4077
Statut éditorial
Publié
Date de publication
2001
Peer-reviewed
Oui
Volume
38
Pages
229-238
Langue
anglais
Résumé
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.
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.
Création de la notice
28/09/2012 11:02
Dernière modification de la notice
20/08/2019 14:02
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