Miocene-Pliocene-Pleistocene glacial history of Arena Valley, Quartermain Mountains, Antarctica

D. R. Marchant, G. H. Denton, C. C. Swisher

Research output: Contribution to journalArticle

93 Scopus citations

Abstract

An 40Ar/39Ar chronology of in-situ to near in-situ volcanic ashfall deposits indicates that the surficial stratigraphy of Arena Valley extends back at least to middle-Miocene time. Wet-based glacial ice occupied part of Arena Valley more than 11.3 Ma ago. Thick, northeast-flowing ice subsequently engulfed Arena Valley, again more than 11.3 Ma ago. Only minor glacier expansion occurred during Pliocene and Pleistocene time. The preservation of Miocene- and Pliocene-age ashes on steep valley slopes indicates that the major bedrock landforms of Arena Valley are relict and that little slope evolution/colluviation has occurred during the last 11.3 Ma. -from Authors

Original languageEnglish (US)
Pages (from-to)269-302
Number of pages34
JournalGeografiska Annaler, Series A
Volume75 A
Issue number4
DOIs
StatePublished - 1993

All Science Journal Classification (ASJC) codes

  • Geography, Planning and Development
  • Geology

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