At Florissant Fossil Beds we can find the remains of a butterfly that fluttered around the shores of ancient lake Florissant nearly 35 million years ago. The ash that covered the butterfly was so fine in texture, almost like talcum powder, that incredible details were preserved. Can you see the spots on the wings? The insect fossils found at Florissant are among the most detailed and abundant insect fossils in the world.