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RMG, Fall 2007, 42.2

In this issue:

  • A tribute to W.A. “Bill” Cobban
  • Redescription of the Late Cretaceous (late Santonian) ammonite Desmoscaphites bassleri Reeside, 1927, from the Western Interior of North America
  • Regional disconformities in Turonian and Coniacian (Upper Cretaceous) strata in Colorado, Wyoming, and adjoining states—biochronological evidence
  • Synonymy of the ammonite genus Ponteixites Warren with Rhaeboceras Meek
  • Geochemistry of the Bonito Lake stock, Lincoln County, New Mexico: Petrogenesis and hydrothermal alteration
  • New 40Ar/39Ar age determinations and paleomagnetic results bearing on the tectonic and magmatic history of the northern Madison Range and Madison Valley region, southwestern Montana, U.S.A.