ABSTRACT The Rocky Mountain Fold and Thrust Belt west of Calgary, Alberta, has a long history of surface geologic mapping and hydrocarbon exploration. Many of these data are in the public domain. As a consequence of this excellent data set, the stratigraphy, sedimentology, and structural geology are very well understood. Major stratigraphic boundaries or facies transitions within Paleozoic units control structural detachment levels, the mechanical behavior of these lithotectonic units, and the structural styles observed. Fault terminations such as lateral ramps and relay zones often occur within depositional fairways comprised of less competent strata. The major facies transition near Field, British Columbia, and the resulting contrast in structural styles between the Eastern Main Ranges and Western Main Ranges will be observed. Two dip transects across the belt will document the foreland progression of major thrust faults or fault systems, and attempt to tie the age of these faults to the timing of terrane accretion and deformation events observed to the west within the southern Canadian Cordillera.

Abstract This wide-ranging discussion of Precambrian rocks includes contributions from a diverse array of authors actively engaged in investigations of various aspects of U.S. Precambrian geology. Summary discussions by the editors of the five major chapters place these contributions in a logical regional framework. A concluding chapter explores Archean crustal processes from the point of view of lunar and planetary analogies, discusses the significance of Sm crustal provinces, and provides an overview of the development of the southern parts of Laurentia. Accompanying plates include a newly compiled map of the Precambrian rocks of the conterminous U.S., maps showing relationships of the Precambrian geology to magnetic anomalies and to isostatic residual gravity, and a new correlation chart for U.S. Precambrian rocks.

Abstract DNAG Transect H-1. Part of GSA’s DNAG Continent-Ocean Transect Series, this transect contains all or most of the following: free-air gravity and magnetic anomaly profiles, heat flow measurements, geologic cross section with no vertical exaggeration, multi-channel seismic reflection profiles, tectonic kindred cross section with vertical exaggeration, geologic map, stratigraphic diagram, and an index map. All transects are on a scale of 1:500,000.