Stratigraphic evidence for the Ross orogeny in the Ellsworth Mountains, West Antarctica: implication for the evolution of the paleo-Pacific margin of Gondwana

P. M. Goldstrand, P. G. Fitzgerald, T. F. Redfield, E. Stump, C. Hobbs

Research output: Contribution to journalArticle

22 Scopus citations

Abstract

Early Paleozoic crustal deformation has been recognized along the paleo-Pacific margin of Gondwana, including southern Africa and the Transantarctic Mountains of East Antarctica. Previously, no stratigraphic evidence for the Ross orogeny had been recognized within the Ellsworth Mountains of West Antarctica, believed to have been contiguous with the Transantarctic Mountains prior to the Mesozoic breakup of Gondwana. A disconformity between Middle to Upper Cambrian Heritage Group and Upper Cambrian to Devonian Crashsite Group strata indicates that the Ross orogeny did affect the Ellsworth Mountains, providing additional evidence that these rocks were once part of East Antarctica. Elsewhere in the Ellsworth Mountains, the disconformity is expressed by an abrupt change from shallow carbonate-platform deposits to siliciclastic shelf deposits. -from Authors

Original languageEnglish (US)
Pages (from-to)427-430
Number of pages4
JournalGeology
Volume22
Issue number5
DOIs
StatePublished - Jan 1 1994
Externally publishedYes

ASJC Scopus subject areas

  • Geology

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