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K-T boundary extinction; geologically instantaneous or gradual event? Evidence from deep-sea benthic foraminifera

Rodolfo Coccioni and Simone Galeotti
K-T boundary extinction; geologically instantaneous or gradual event? Evidence from deep-sea benthic foraminifera
Geology (Boulder) (September 1994) 22 (9): 779-782

Abstract

A stepped pattern of benthic foraminiferal decimation, survival, and recovery identified across the Cretaceous-Tertiary (K-T) boundary at Caravaca (southeast Spain) suggests that an exceptionally large influx of nutrients reached the sea floor suddenly, at the time of the K-T extinction event. Rapid reestablishment of pre-K-T boundary environmental conditions followed. Our data demonstrate a close coupling between the collapse of the ecologic system in the upper water column at Caravaca and a correspondent decimation of bottom dwellers on the sea floor. The dramatic environmental collapse of deep-water benthic foraminiferal communities at the end of the Cretaceous at Caravaca suggests that the K-T boundary event was geologically instantaneous and catastrophic.


ISSN: 0091-7613
EISSN: 1943-2682
Coden: GLGYBA
Serial Title: Geology (Boulder)
Serial Volume: 22
Serial Issue: 9
Title: K-T boundary extinction; geologically instantaneous or gradual event? Evidence from deep-sea benthic foraminifera
Affiliation: Universita di Urbino, Istituto di Geologia, Urbino, Italy
Pages: 779-782
Published: 199409
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
References: 29
Accession Number: 1994-047797
Categories: Stratigraphy
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: charts
N38°04'35" - N38°04'35", W01°52'40" - W01°52'40"
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute.
Update Code: 199422
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