Contractional nature of Devonian-Mississippian Antler tectonism along the North American continental margin

M. T. Smith, W. R. Dickinson, G. E. Gehrels

Research output: Contribution to journalArticle

38 Scopus citations

Abstract

Regional tectonic analysis suggests that the entire Cordilleran continental margin, from Nevada to the Yukon, underwent contractional orogeny involving emplacement of deep basinal, submarine-fan, and mafic volcanic strata over authochthonous continental margin strata during Late Devonian to Mississippian time (Antler orogeny). Displaced parautochthonous strata are present from Nevada to east-central British Columbia, and perhaps within the Yukon-Tanana terrane of Yukon and eastern Alaska. Manifestations of the orogenic event in the northern Cordillera are preserved primarily by normal faults and related coarse clastic strata of the Selwyn basin. These features formed due to flexural extension during foreland deformation, rather than mid-Paleozoic rifting or transtension. -Authors

Original languageEnglish (US)
Pages (from-to)21-24
Number of pages4
JournalGeology
Volume21
Issue number1
DOIs
StatePublished - Jan 1 1993
Externally publishedYes

ASJC Scopus subject areas

  • Geology

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