Abstract

The Bonanza King Dolomite (Middle and Late Cambrian), Lead Gulch Formation (Late Cambrian), and Tamarack Canyon Dolomite (Late Cambrian) are exposed in the Front Ridge area on the west side of the Inyo Mountains east of Lone Pine, California, and represent the southwestern most occurrences of miogeosynclinal rocks of Late Cambrian age in North America. The Bonanza King Dolomite forms the core of an elongate north-northwest-trending anticline that is the southernmost extension of a regionally significant fold in the northern Inyo Mountains. This anticlinal block is in place relative to the allochthonous northern Inyo and northern Panamint Mountains and provides evidence for a possible eastern limit for the root zone from which rocks of Late Cambrian age originated, which are included in allochthonous masses east of the Front Ridge area.

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