| Here is a trilobite cluster from the Lower Cambrian of California with the species Olenellus clarki. The largest Olenellus clarki on this piece measures about 22 mm. | |||
Location: | Nopah Range, Inyo County, California, USA | ||
| Size Matrix: | about 98 x 44 mm | ||
| Age: | Lower Cambrian, Pyramid Shale, Carrara Formation(about. 520 Ma) | ||