Five days were spent geological mapping and sampling at Horseshoe Mountain. The strata cropping out are the Feather Conglomerate (Late Permian - early Triassic) and the Lashly Formation (Mid-Late Triassic). Reconnaissance and a small amount of sampling of the Lashly Formation at Shapeless Mountain was also conducted. Detailed petrological studies were made of the sandstone samples to determine mineralogical changes that may occur throughout this Triassic sequence. The relationship between sandstone texture and sedimentary structures was also studied.