USA Graphite Inc fka USGT

[DITRstocks]

As seen in this and adjacent quadrangles, the thrust-repeated sequence folds around the Lamoille Canyon fold nappe, resulting in a layering of alternating Prospect Mountain Quartzite and the marble of Verdi Peak. The thrust surface lacks recognizable cataclastic rocks or outcrop-scale discordance, a lack that can be attributed to post-thrusting metamorphism and deformation. Wedgelike slivers of interfingered metaquartzite and marble are mapped northwest and southwest of Thomas Canyon Campground (as well as elsewhere outside the quadrangle), and are interpreted as structural horses bound by splays of the thrust. When restored to prefolding position the shapes of these mapped slivers suggest an originally westward thrust imbrication, indicative of westward-directed thrusting (Howard and others, 1979). The thrusting may relate to west-verging folds and thrusts of Jurassic or Early Cretaceous age 50 km to the west in the Piñon Range area that were described by Ketner and Smith (1974) and Smith and Ketner (1977).

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