The problem of landscape evolution across the Cretaceous/Paleogene boundary revisited at Madrid East, southeastern Colorado, U.S.A

Faulting at the well-known Madrid East K/Pg boundary locality in the Raton Basin of southeastern Colorado, U.S.A., recently has been interpreted to be the result of remote triggering by the Chicxulub impact in the Yucátan Peninsula, Mexico. However, a similar fault at the neighboring, correlative Ma...

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Bibliographic Details
Published in:Cretaceous research 2024-01, Vol.153, p.105705, Article 105705
Main Author: Berry, Keith
Format: Article
Language:English
Subjects:
Asteroid impact
Chicxulub
Crevasse splay
K/Pg boundary
Seismicity
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Summary:Faulting at the well-known Madrid East K/Pg boundary locality in the Raton Basin of southeastern Colorado, U.S.A., recently has been interpreted to be the result of remote triggering by the Chicxulub impact in the Yucátan Peninsula, Mexico. However, a similar fault at the neighboring, correlative Madrid West locality recently has been attributed to overloading by a rapidly or catastrophically deposited crevasse splay in a sedimentological study. Therefore, this investigation seeks to provide additional insight on this problem. By focusing primarily on the timing of faulting and deposition of the crevasse splay at Madrid East and neighboring localities, this study presents evidence that faulting at Madrid East and neighboring localities post-dated the K/Pg boundary. •Madrid East and Madrid West contain similar faults.•Chicxulub-related seismicity or overloading by a crevasse splay have been proposed.•Faulting post-dates the K/Pg boundary.•Compelling evidence for a seismite at the K/Pg boundary is lacking.
ISSN:0195-6671
1095-998X
DOI:10.1016/j.cretres.2023.105705