These Fossils are from the Bullhead City, AZ area. I collected them around my mom's house up Silver Creek RD. You can find hundreds of them on the surface, look for a orange ish colored rock. Whats cool about these Fossils is there can be hundreds of little Sea creatures, "Crinoid/Blastoids" and other neat things in a single rock. I took some to a collage to find out a little more and he said at one time that area was covered in water and said the fossils were about 350 million years old. Any way enjoy the photos.