Crust and upper mantle study of McMurdo sound ( Antarctica).

L. D. McGinnis, D. D. Wilson, W. J. Burdelik, Timothy H Larson

Research output: Contribution to journalArticle

Abstract

Crustal thickness is the fundamental distinguishing characteristic between East and West Antarctica. Its nature and variation is discussed. It is assumed that the change in crustal thickness occurred during the Ross Orogeny, one of a series of Early Palaeozoic orogenic epochs that created the boundary between East and West Antarctica. The orogenies were episodes of collision between two plates 20-25 km thick, comparable to crustal thicknesses associated with present, passive continental margins. Complex modification of West Antarctica and the belt of convergence has continued since the Early Palaeozoic orogenies; however, the integrity of the presently remaining core of East Antarctica has not been seriously compromised since cratonisation. -from Authors

Original languageEnglish (US)
Pages (from-to)204-208
Number of pages5
JournalUnknown Journal
StatePublished - Jan 1 1983
Externally publishedYes

ASJC Scopus subject areas

  • Environmental Science(all)
  • Earth and Planetary Sciences(all)

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