Fault dating in the Canadian Rocky Mountains: Evidence for late Cretaceous and early Eocene orogenic pulses: REPLY: REPLY

Fault dating in the Canadian Rocky Mountains: Evidence for late Cretaceous and early Eocene orogenic pulses

Fault rocks from the classic Rocky Mountain foreland fold-and-thrust belt in southwestern Canada were dated by Ar analysis of clay grain-size fractions. Using X-ray diffraction quantification of the detrital and authigenic component of each fraction, these determinations give ages for individual faults in the area (illite age analysis). The resulting ages cluster around 72 and 52 Ma (here calle...

The Authors’ Reply

The Authors’ Reply

Elevated weathering rates in the Rocky Mountains during the Early Eocene Climatic Optimum

M. ELLIOT SMITH1*, ALAN R. CARROLL1 AND ERICH R. MUELLER2 Department of Geology and Geophysics, University of Wisconsin-Madison, 1215 W Dayton St., Madison WI 53706, USA Department of Geography, University of Colorado, Boulder, Colorado 80309, USA *Current address: Department of Geology, Sonoma State University, 1801 E Cotati Ave, Rohnert Park, California 94928, USA †e-mail: michael.smith@sonom...

The Authors’ Reply