Rocky Mountain Geology cover volume 42, number 2

Fall 2007

A tribute to W.A. “Bill” Cobban 
Neil H. Landman; Neal L. Larson

Redescription of the Late Cretaceous (late Santonian) ammonite Desmoscaphites bassleri Reeside, 1927, from the Western Interior of North America 
Neil H. Landman; William A. Cobban

Regional disconformities in Turonian and Coniacian (Upper Cretaceous) strata in Colorado, Wyoming, and adjoining states—biochronological evidence 
E. Allen Merewether; William A. Cobban; John D. Obradovich

Synonymy of the ammonite genus Ponteixites Warren with Rhaeboceras Meek 
James W. Grier; Joyce C. Grier; Neal L. Larson; Jack G. Petersen

Geochemistry of the Bonito Lake stock, Lincoln County, New Mexico : Petrogenesis and hydrothermal alteration 
James Constantopoulos

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. 
Karl S. Kellogg; Stephen S. Harlan

Price
$15.00