| Note the individual standing along the lower slopes, at roughly lower center left of photograph. He is standing on the ammonoid (Triassic ceratites types) -ammonite-bearing upper Triassic section of the upper Triassic-lower Jurassic Gabbs Formation in Ammonite Canyon, Nevada--rocks dated at around 205 to 202 million years old (late Norian Stage through early Rhaetian Stage geologic age). Dirt road at right passes through massive brownish terrestrial conglomerates and fanglomerates of the late lower Jurassic Dunlap Formation, Toarcian Stage age, approximately 180 million years old. |