Laramide thrust-generated alluvial-fan sedimentation, Sphinx Conglomerate, southwestern Montana

Research output: Contribution to journalArticle

54 Scopus citations

Abstract

The Sphinx consists of more than 1000 m (3300 ft) of synorogenic boulder and cobble conglomerate derived from a Late Cretaceous Laramide uplift that was located in the area presently occupied by the Madison River valley. Deposition of the upper Sphinx was probably controlled by source lithology, as the influx of very coarse, resistant clasts from middle and lower Paleozoic carbonates overwhelmed the fan system's ability to organize its load of sediment by normal fan processes. -from Authors

Original languageEnglish (US)
Pages (from-to)135-155
Number of pages21
JournalAmerican Association of Petroleum Geologists Bulletin
Volume71
Issue number2
StatePublished - Jan 1 1987
Externally publishedYes

ASJC Scopus subject areas

  • Fuel Technology
  • Energy Engineering and Power Technology
  • Geology
  • Geochemistry and Petrology
  • Earth and Planetary Sciences (miscellaneous)

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