40Ar/39Ar constraints on chronology of Augusta Fault Zone movement and late Alleghanian extension, southern Appalachian Piedmont, South Carolina and Georgia

H. D. Maher, R. D. Dallmeyer, D. T. Secor, P. E. Sacks

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

Geologic relations and the 40Ar/39Ar cooling ages suggest that the Augusta fault juxtaposed Augusta terrane rocks from upper crustal levels against Savannah River terrane rocks from lower crustal levels at and after about 274 Ma. Late Alleghanian extension along the Augusta fault zone is consistent with gravitational collapse of an orogenic topographic front which developed during crustal shortening in early stages of the Alleghanian orogeny. The role of Alleghanian extension in the Piedmont tectonothermal history could be significant. -from Authors

Original languageEnglish (US)
Pages (from-to)428-448
Number of pages21
JournalAmerican Journal of Science
Volume294
Issue number4
DOIs
StatePublished - Jan 1 1994

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Alleghanian
piedmont
chronology
fault zone
terrane
Alleghanian orogeny
crustal shortening
rock
cooling
history
river

ASJC Scopus subject areas

  • Earth and Planetary Sciences(all)

Cite this

40Ar/39Ar constraints on chronology of Augusta Fault Zone movement and late Alleghanian extension, southern Appalachian Piedmont, South Carolina and Georgia. / Maher, H. D.; Dallmeyer, R. D.; Secor, D. T.; Sacks, P. E.

In: American Journal of Science, Vol. 294, No. 4, 01.01.1994, p. 428-448.

Research output: Contribution to journalArticle

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