Vol. 13 No. 3 (1973)
Articles

THE CANADIAN CORDILLERA

Roger. A. Stacey
Department of Energy, Mines and Resources, Ottawa, Canada.

Published 1973-07-01

How to Cite

Stacey, R. A. (1973). THE CANADIAN CORDILLERA. Geofísica Internacional, 13(3), 243-266. https://doi.org/10.22201/igeof.00167169p.1973.13.3.957

Abstract

The physiographic and geologic subdivisions of the Canadian Cordillera are reviewed and the present boundaries between the American, Paciï¬c and Juan de Fuca plates are deï¬ned. A preliminary interpretation of the geological history of the Cordillera since the Proterozoic is presented in terms of plate theory. The results of aeromagnetic, magnetic variation, gravity and heat flow measurements, refraction seismic experiments and seismology studies over the Cordilleran region and the adjacent Paciï¬c Ocean are reviewed and an attempt is made torelate these data to the tectonic history of the Cordillera. Areas of special interest are the present day boundaries between the American, Paciï¬c and Juan de Fuca plates and the recent history of the triple junction between these plates northwest of Vancouver Island. Within the Cordillera interest is focused on the recognition of older plate boundaries and the study of the physical characteristics of the crust and upper mantle.