crotalocephalus gibbus trilobite fossil close up in a bedrock base

age aged ammonite ammonites ancient animal antique archeology artifact background bed bedrock berber biology cliff close closeup creature cretaceous crotalocephalus cut devonian dig epoch era evolution excavated fossil fossilized fossils geological geology gibbus giganteus history jurrasic macro man marine mineral minicryphaeus mollusk moroccan morrocan morroco morrocon natural nature ocean old organism paleontology period petrified prehistoric prehistory prep rock sea seashell sepia shell shop site snail spiral stone stones store surface swirl texture triassic trilobite