Species: Olenellus gilberti
Age: Lower Cambrian
Formation: Pioche Shale
Locality: Lincoln County, Nevada
This an incredible example of the classic American trilobite species Olenellus gilberti. The trilobite is stained orange by iron oxide inclusions and is sitting against a pink matrix covered with branching, tree-like dendrite crystals. The trilobite measures 6.4 cm long including telson and 4.2 cm wide across the genals. The matrix measures 19 x 13 cm (7.5 x 5 inches).