Marble Mountain Fossil Bed contains one of the classic Cambrian trilobite fossil sites within the Western United States. The Marble Mountain Fossil Beds lie in a beautiful shale formation that is 60-feet thick and over 550 million years old. Trilobites were small marine crustaceans that resemble modern-day horseshoe crabs. Trilobite refers to the three long spinal sections of the skeleton. Trilobites are extinct arthropods that disappeared approximately 250 million years ago. You may collect a reasonable number of invertebrate fossils and rocks for personal use without a permit and free of charge of BLM lands. Personal collections cannot be sold or bartered for personal gain, and commercial collecting is not allowed without a permit. Only hand tools may be used; explosives and power equipment are not allowed. Collecting may not be allowed in special management areas, such as wilderness and national historic sites or on mining claims.

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