1. list three locations in the u. s. where you might find trilobite fossils.

Trilobites are arthropods fossils,known to people throughout history. They are very diverse Class of animal (total 10 classes of trilobites), but they all have the same basic design: three lobes: a left pleural lobe, a middle axial lobe, and a right pleural lobe. In U.S you might find trilobite fossils in the following locations:
1. Oklahoma 
2. Utah
3. New York

They went to leyden, holland