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Antarctic Peninsular cryosphere; early Oligocene (c. 30 Ma) initiation and a revised glacial chronology

R. V. Dingle and M. Lavelle
Antarctic Peninsular cryosphere; early Oligocene (c. 30 Ma) initiation and a revised glacial chronology
Journal of the Geological Society of London (May 1998) 155, Part 3: 433-437

Abstract

Strontium isotope stratigraphy provides a chronology for Cenozoic cryogenic strata in the northern Antarctic Peninsula and allows an assessment of diachronism in onset of glacial conditions between East and West Antarctica. The earliest observed event on the Antarctic Peninsula was late Early Oligocene (29.8 + or - .6 Ma) (at least c. 4 Ma later than in East Antarctica), with a second in the early Early Miocene (22.6 + or - .4 Ma). Both glacials and intervening interglacial were continent-wide phenomena. Two late Neogene glaciations are distinguished: early Late Miocene (9.9 + or - .97Ma) (Hobbs Glacier/Jones Mountains) and latest Miocene (Alexander Island). A further late Neogene glacial deposit (Weddell Formation) can be constrained only as <c. 10 Ma.


ISSN: 0016-7649
EISSN: 2041-479X
Coden: JGSLAS
Serial Title: Journal of the Geological Society of London
Serial Volume: 155, Part 3
Title: Antarctic Peninsular cryosphere; early Oligocene (c. 30 Ma) initiation and a revised glacial chronology
Affiliation: British Antarctic Survey, Cambridge, United Kingdom
Pages: 433-437
Published: 199805
Text Language: English
Publisher: Geological Society of London, London, United Kingdom
References: 31
Accession Number: 1998-038402
Categories: StratigraphyIsotope geochemistry
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 2 tables
S77°00'00" - S63°00'00", W77°30'00" - W56°30'00"
Secondary Affiliation: University of Cambridge, GBR, United Kingdom
Country of Publication: United Kingdom
Secondary Affiliation: GeoRef, Copyright 2018, American Geosciences Institute.
Update Code: 199815
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