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GEOREF RECORD

Recent distribution, origin, and coiling ratio changes in Globorotalia pachyderma (Ehrenberg)

D. G. Jenkins
Recent distribution, origin, and coiling ratio changes in Globorotalia pachyderma (Ehrenberg)
Micropaleontology (1967) 13 (2): 195-203

Abstract

Globorotalia pachyderma (Ehrenberg) is sinistrally coiled in polar and subpolar seas and dextrally coiled towards lower latitudes. In the New Zealand upper Cenozoic, G. pachyderma possibly evolved from Globorotalia continuosa Blow, and there are ten alternating sinistral and dextral populations of G. pachyderma which have been interpreted as indicative of alternating cold and warmer marine conditions. Comparison is made with upper Cenozoic G. pachyderma coiling ratios of New Zealand, Italy and California.


ISSN: 0026-2803
Coden: MCPLAI
Serial Title: Micropaleontology
Serial Volume: 13
Serial Issue: 2
Title: Recent distribution, origin, and coiling ratio changes in Globorotalia pachyderma (Ehrenberg)
Author(s): Jenkins, D. G.
Pages: 195-203
Published: 1967
Text Language: English
Publisher: American Museum of Natural History, New York, NY, United States
Accession Number: 1967-009444
Categories: Stratigraphy
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. (incl. sketch map)
N32°30'00" - N42°00'00", W124°30'00" - W114°15'00"
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from Bibliography and Index of Geology Exclusive of North America, Geological Society of America, Boulder, CO, United States
Update Code: 1967
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