| Here is a nice Trilobite from the middle Cambrian Spence Shale from Idaho. It become hard to obtain fossils that come from Idaho at all. | |||
Location: | Spence Gulch, near Liberty, Idaho USA | ||
| Size trilobite: | about 13 mm long | ||
| Age: | Middle Cambrian, Spence Shale., Langston Fm. (about. 518 Mill. y.o.) | ||