Fossil & Bone ID Guide
From Precambrian stromatolites to Cenozoic megafauna. Identify 795+ specimens with era classification, regional collecting data, and field identification tips built for real outings.
795 specimens cataloged across every geological era
All Specimens
Iowa Trilobite
arthropod
Trilobite is a realistic Iowa fossil profile built around segmented marine arthropod preserved in shale or limestone from ancient inland seas. In this state, success usually comes from learning Silurian and Devonian limestones, shale cuts, and glacial gravels, then timing runoff, reservoir drawdown, surf cuts, or road work that exposes fresh fossil-bearing rock instead of hunting blindly.
Illinois Trilobite
arthropod
Trilobite is a realistic Illinois fossil profile built around segmented marine arthropod preserved in shale or limestone from ancient inland seas. In this state, success usually comes from learning Silurian and Devonian limestones, shale cuts, and glacial gravels, then timing runoff, reservoir drawdown, surf cuts, or road work that exposes fresh fossil-bearing rock instead of hunting blindly.
Indiana Trilobite
arthropod
Trilobite is a realistic Indiana fossil profile built around segmented marine arthropod preserved in shale or limestone from ancient inland seas. In this state, success usually comes from learning Silurian and Devonian limestones, shale cuts, and glacial gravels, then timing runoff, reservoir drawdown, surf cuts, or road work that exposes fresh fossil-bearing rock instead of hunting blindly.
Ohio Trilobite
arthropod
Trilobite is a realistic Ohio fossil profile built around segmented marine arthropod preserved in shale or limestone from ancient inland seas. In this state, success usually comes from learning Silurian and Devonian limestones, shale cuts, and glacial gravels, then timing runoff, reservoir drawdown, surf cuts, or road work that exposes fresh fossil-bearing rock instead of hunting blindly.
Ohio Trilobite
arthropod
Trilobite is a realistic Ohio fossil profile built around segmented marine arthropod preserved in shale or limestone from ancient inland seas. In this state, success usually comes from learning Devonian shales, Mississippian limestones, and glacial gravels, then timing runoff, reservoir drawdown, surf cuts, or road work that exposes fresh fossil-bearing rock instead of hunting blindly.
Pennsylvania Trilobite
arthropod
Trilobite is a realistic Pennsylvania fossil profile built around segmented marine arthropod preserved in shale or limestone from ancient inland seas. In this state, success usually comes from learning Devonian shales, Mississippian limestones, and glacial gravels, then timing runoff, reservoir drawdown, surf cuts, or road work that exposes fresh fossil-bearing rock instead of hunting blindly.
West Virginia Trilobite
arthropod
Trilobite is a realistic West Virginia fossil profile built around segmented marine arthropod preserved in shale or limestone from ancient inland seas. In this state, success usually comes from learning Devonian shales, Mississippian limestones, and glacial gravels, then timing runoff, reservoir drawdown, surf cuts, or road work that exposes fresh fossil-bearing rock instead of hunting blindly.
Kentucky Trilobite
arthropod
Trilobite is a realistic Kentucky fossil profile built around segmented marine arthropod preserved in shale or limestone from ancient inland seas. In this state, success usually comes from learning Devonian shales, Mississippian limestones, and glacial gravels, then timing runoff, reservoir drawdown, surf cuts, or road work that exposes fresh fossil-bearing rock instead of hunting blindly.
Indiana Trilobite
arthropod
Trilobite is a realistic Indiana fossil profile built around segmented marine arthropod preserved in shale or limestone from ancient inland seas. In this state, success usually comes from learning Devonian shales, Mississippian limestones, and glacial gravels, then timing runoff, reservoir drawdown, surf cuts, or road work that exposes fresh fossil-bearing rock instead of hunting blindly.
New York Trilobite
arthropod
Trilobite is a realistic New York fossil profile built around segmented marine arthropod preserved in shale or limestone from ancient inland seas. In this state, success usually comes from learning Devonian shales, glacial gravels, and coastal shell beds, then timing runoff, reservoir drawdown, surf cuts, or road work that exposes fresh fossil-bearing rock instead of hunting blindly.
Pennsylvania Trilobite
arthropod
Trilobite is a realistic Pennsylvania fossil profile built around segmented marine arthropod preserved in shale or limestone from ancient inland seas. In this state, success usually comes from learning Devonian shales, glacial gravels, and coastal shell beds, then timing runoff, reservoir drawdown, surf cuts, or road work that exposes fresh fossil-bearing rock instead of hunting blindly.
New Jersey Trilobite
arthropod
Trilobite is a realistic New Jersey fossil profile built around segmented marine arthropod preserved in shale or limestone from ancient inland seas. In this state, success usually comes from learning Devonian shales, glacial gravels, and coastal shell beds, then timing runoff, reservoir drawdown, surf cuts, or road work that exposes fresh fossil-bearing rock instead of hunting blindly.
West Virginia Trilobite
arthropod
Trilobite is a realistic West Virginia fossil profile built around segmented marine arthropod preserved in shale or limestone from ancient inland seas. In this state, success usually comes from learning roadcuts through limestone and shale, coal spoils, and stream gravels, then timing runoff, reservoir drawdown, surf cuts, or road work that exposes fresh fossil-bearing rock instead of hunting blindly.
Virginia Trilobite
arthropod
Trilobite is a realistic Virginia fossil profile built around segmented marine arthropod preserved in shale or limestone from ancient inland seas. In this state, success usually comes from learning roadcuts through limestone and shale, coal spoils, and stream gravels, then timing runoff, reservoir drawdown, surf cuts, or road work that exposes fresh fossil-bearing rock instead of hunting blindly.
North Carolina Trilobite
arthropod
Trilobite is a realistic North Carolina fossil profile built around segmented marine arthropod preserved in shale or limestone from ancient inland seas. In this state, success usually comes from learning roadcuts through limestone and shale, coal spoils, and stream gravels, then timing runoff, reservoir drawdown, surf cuts, or road work that exposes fresh fossil-bearing rock instead of hunting blindly.
Tennessee Trilobite
arthropod
Trilobite is a realistic Tennessee fossil profile built around segmented marine arthropod preserved in shale or limestone from ancient inland seas. In this state, success usually comes from learning roadcuts through limestone and shale, coal spoils, and stream gravels, then timing runoff, reservoir drawdown, surf cuts, or road work that exposes fresh fossil-bearing rock instead of hunting blindly.
Kentucky Trilobite
arthropod
Trilobite is a realistic Kentucky fossil profile built around segmented marine arthropod preserved in shale or limestone from ancient inland seas. In this state, success usually comes from learning roadcuts through limestone and shale, coal spoils, and stream gravels, then timing runoff, reservoir drawdown, surf cuts, or road work that exposes fresh fossil-bearing rock instead of hunting blindly.
Arkansas Trilobite
arthropod
Trilobite is a realistic Arkansas fossil profile built around segmented marine arthropod preserved in shale or limestone from ancient inland seas. In this state, success usually comes from learning Mississippian limestones, chert gravels, and shale roadcuts, then timing runoff, reservoir drawdown, surf cuts, or road work that exposes fresh fossil-bearing rock instead of hunting blindly.
Missouri Trilobite
arthropod
Trilobite is a realistic Missouri fossil profile built around segmented marine arthropod preserved in shale or limestone from ancient inland seas. In this state, success usually comes from learning Mississippian limestones, chert gravels, and shale roadcuts, then timing runoff, reservoir drawdown, surf cuts, or road work that exposes fresh fossil-bearing rock instead of hunting blindly.
Oklahoma Trilobite
arthropod
Trilobite is a realistic Oklahoma fossil profile built around segmented marine arthropod preserved in shale or limestone from ancient inland seas. In this state, success usually comes from learning Mississippian limestones, chert gravels, and shale roadcuts, then timing runoff, reservoir drawdown, surf cuts, or road work that exposes fresh fossil-bearing rock instead of hunting blindly.
Minnesota Trilobite
arthropod
Trilobite is a realistic Minnesota fossil profile built around segmented marine arthropod preserved in shale or limestone from ancient inland seas. In this state, success usually comes from learning glacial till, Devonian limestones, and Lake Superior gravels, then timing runoff, reservoir drawdown, surf cuts, or road work that exposes fresh fossil-bearing rock instead of hunting blindly.
Wisconsin Trilobite
arthropod
Trilobite is a realistic Wisconsin fossil profile built around segmented marine arthropod preserved in shale or limestone from ancient inland seas. In this state, success usually comes from learning glacial till, Devonian limestones, and Lake Superior gravels, then timing runoff, reservoir drawdown, surf cuts, or road work that exposes fresh fossil-bearing rock instead of hunting blindly.
Michigan Trilobite
arthropod
Trilobite is a realistic Michigan fossil profile built around segmented marine arthropod preserved in shale or limestone from ancient inland seas. In this state, success usually comes from learning glacial till, Devonian limestones, and Lake Superior gravels, then timing runoff, reservoir drawdown, surf cuts, or road work that exposes fresh fossil-bearing rock instead of hunting blindly.
Iowa Isotelus Trilobite
arthropod
Isotelus Trilobite is a realistic Iowa fossil profile built around large trilobite often found as enrolled sections in limestone and weathered talus. In this state, success usually comes from learning Silurian and Devonian limestones, shale cuts, and glacial gravels, then timing runoff, reservoir drawdown, surf cuts, or road work that exposes fresh fossil-bearing rock instead of hunting blindly.
Illinois Isotelus Trilobite
arthropod
Isotelus Trilobite is a realistic Illinois fossil profile built around large trilobite often found as enrolled sections in limestone and weathered talus. In this state, success usually comes from learning Silurian and Devonian limestones, shale cuts, and glacial gravels, then timing runoff, reservoir drawdown, surf cuts, or road work that exposes fresh fossil-bearing rock instead of hunting blindly.
Indiana Isotelus Trilobite
arthropod
Isotelus Trilobite is a realistic Indiana fossil profile built around large trilobite often found as enrolled sections in limestone and weathered talus. In this state, success usually comes from learning Silurian and Devonian limestones, shale cuts, and glacial gravels, then timing runoff, reservoir drawdown, surf cuts, or road work that exposes fresh fossil-bearing rock instead of hunting blindly.
Ohio Isotelus Trilobite
arthropod
Isotelus Trilobite is a realistic Ohio fossil profile built around large trilobite often found as enrolled sections in limestone and weathered talus. In this state, success usually comes from learning Silurian and Devonian limestones, shale cuts, and glacial gravels, then timing runoff, reservoir drawdown, surf cuts, or road work that exposes fresh fossil-bearing rock instead of hunting blindly.
Minnesota Isotelus Trilobite
arthropod
Isotelus Trilobite is a realistic Minnesota fossil profile built around large trilobite often found as enrolled sections in limestone and weathered talus. In this state, success usually comes from learning glacial till, Devonian limestones, and Lake Superior gravels, then timing runoff, reservoir drawdown, surf cuts, or road work that exposes fresh fossil-bearing rock instead of hunting blindly.
Wisconsin Isotelus Trilobite
arthropod
Isotelus Trilobite is a realistic Wisconsin fossil profile built around large trilobite often found as enrolled sections in limestone and weathered talus. In this state, success usually comes from learning glacial till, Devonian limestones, and Lake Superior gravels, then timing runoff, reservoir drawdown, surf cuts, or road work that exposes fresh fossil-bearing rock instead of hunting blindly.
Michigan Isotelus Trilobite
arthropod
Isotelus Trilobite is a realistic Michigan fossil profile built around large trilobite often found as enrolled sections in limestone and weathered talus. In this state, success usually comes from learning glacial till, Devonian limestones, and Lake Superior gravels, then timing runoff, reservoir drawdown, surf cuts, or road work that exposes fresh fossil-bearing rock instead of hunting blindly.
Ohio Isotelus Trilobite
arthropod
Isotelus Trilobite is a realistic Ohio fossil profile built around large trilobite often found as enrolled sections in limestone and weathered talus. In this state, success usually comes from learning Devonian shales, Mississippian limestones, and glacial gravels, then timing runoff, reservoir drawdown, surf cuts, or road work that exposes fresh fossil-bearing rock instead of hunting blindly.
Pennsylvania Isotelus Trilobite
arthropod
Isotelus Trilobite is a realistic Pennsylvania fossil profile built around large trilobite often found as enrolled sections in limestone and weathered talus. In this state, success usually comes from learning Devonian shales, Mississippian limestones, and glacial gravels, then timing runoff, reservoir drawdown, surf cuts, or road work that exposes fresh fossil-bearing rock instead of hunting blindly.
West Virginia Isotelus Trilobite
arthropod
Isotelus Trilobite is a realistic West Virginia fossil profile built around large trilobite often found as enrolled sections in limestone and weathered talus. In this state, success usually comes from learning Devonian shales, Mississippian limestones, and glacial gravels, then timing runoff, reservoir drawdown, surf cuts, or road work that exposes fresh fossil-bearing rock instead of hunting blindly.
Kentucky Isotelus Trilobite
arthropod
Isotelus Trilobite is a realistic Kentucky fossil profile built around large trilobite often found as enrolled sections in limestone and weathered talus. In this state, success usually comes from learning Devonian shales, Mississippian limestones, and glacial gravels, then timing runoff, reservoir drawdown, surf cuts, or road work that exposes fresh fossil-bearing rock instead of hunting blindly.
Indiana Isotelus Trilobite
arthropod
Isotelus Trilobite is a realistic Indiana fossil profile built around large trilobite often found as enrolled sections in limestone and weathered talus. In this state, success usually comes from learning Devonian shales, Mississippian limestones, and glacial gravels, then timing runoff, reservoir drawdown, surf cuts, or road work that exposes fresh fossil-bearing rock instead of hunting blindly.
Colorado Elrathia Trilobite
arthropod
Elrathia Trilobite is a realistic Colorado fossil profile built around small shale trilobite famous from thin laminated western exposures. In this state, success usually comes from learning Morrison outcrops, Green River beds, and uplifted marine limestones, then timing runoff, reservoir drawdown, surf cuts, or road work that exposes fresh fossil-bearing rock instead of hunting blindly.
Utah Elrathia Trilobite
arthropod
Elrathia Trilobite is a realistic Utah fossil profile built around small shale trilobite famous from thin laminated western exposures. In this state, success usually comes from learning Morrison outcrops, Green River beds, and uplifted marine limestones, then timing runoff, reservoir drawdown, surf cuts, or road work that exposes fresh fossil-bearing rock instead of hunting blindly.
Arizona Elrathia Trilobite
arthropod
Elrathia Trilobite is a realistic Arizona fossil profile built around small shale trilobite famous from thin laminated western exposures. In this state, success usually comes from learning badlands mudstones, petrified wood flats, and playa margins, then timing runoff, reservoir drawdown, surf cuts, or road work that exposes fresh fossil-bearing rock instead of hunting blindly.
Nevada Elrathia Trilobite
arthropod
Elrathia Trilobite is a realistic Nevada fossil profile built around small shale trilobite famous from thin laminated western exposures. In this state, success usually comes from learning badlands mudstones, petrified wood flats, and playa margins, then timing runoff, reservoir drawdown, surf cuts, or road work that exposes fresh fossil-bearing rock instead of hunting blindly.
Utah Elrathia Trilobite
arthropod
Elrathia Trilobite is a realistic Utah fossil profile built around small shale trilobite famous from thin laminated western exposures. In this state, success usually comes from learning badlands mudstones, petrified wood flats, and playa margins, then timing runoff, reservoir drawdown, surf cuts, or road work that exposes fresh fossil-bearing rock instead of hunting blindly.
New Mexico Elrathia Trilobite
arthropod
Elrathia Trilobite is a realistic New Mexico fossil profile built around small shale trilobite famous from thin laminated western exposures. In this state, success usually comes from learning badlands mudstones, petrified wood flats, and playa margins, then timing runoff, reservoir drawdown, surf cuts, or road work that exposes fresh fossil-bearing rock instead of hunting blindly.
Montana Elrathia Trilobite
arthropod
Elrathia Trilobite is a realistic Montana fossil profile built around small shale trilobite famous from thin laminated western exposures. In this state, success usually comes from learning dinosaur-bearing mudstones, glacial gravels, and marine shales, then timing runoff, reservoir drawdown, surf cuts, or road work that exposes fresh fossil-bearing rock instead of hunting blindly.
Idaho Elrathia Trilobite
arthropod
Elrathia Trilobite is a realistic Idaho fossil profile built around small shale trilobite famous from thin laminated western exposures. In this state, success usually comes from learning dinosaur-bearing mudstones, glacial gravels, and marine shales, then timing runoff, reservoir drawdown, surf cuts, or road work that exposes fresh fossil-bearing rock instead of hunting blindly.
Wyoming Elrathia Trilobite
arthropod
Elrathia Trilobite is a realistic Wyoming fossil profile built around small shale trilobite famous from thin laminated western exposures. In this state, success usually comes from learning dinosaur-bearing mudstones, glacial gravels, and marine shales, then timing runoff, reservoir drawdown, surf cuts, or road work that exposes fresh fossil-bearing rock instead of hunting blindly.
North Dakota Ammonite
cephalopod
Ammonite is a realistic North Dakota fossil profile built around coiled marine shell with complex sutures from warm Cretaceous seas. In this state, success usually comes from learning chalk beds, badlands mudstones, and river gravels, then timing runoff, reservoir drawdown, surf cuts, or road work that exposes fresh fossil-bearing rock instead of hunting blindly.
South Dakota Ammonite
cephalopod
Ammonite is a realistic South Dakota fossil profile built around coiled marine shell with complex sutures from warm Cretaceous seas. In this state, success usually comes from learning chalk beds, badlands mudstones, and river gravels, then timing runoff, reservoir drawdown, surf cuts, or road work that exposes fresh fossil-bearing rock instead of hunting blindly.
Nebraska Ammonite
cephalopod
Ammonite is a realistic Nebraska fossil profile built around coiled marine shell with complex sutures from warm Cretaceous seas. In this state, success usually comes from learning chalk beds, badlands mudstones, and river gravels, then timing runoff, reservoir drawdown, surf cuts, or road work that exposes fresh fossil-bearing rock instead of hunting blindly.
Kansas Ammonite
cephalopod
Ammonite is a realistic Kansas fossil profile built around coiled marine shell with complex sutures from warm Cretaceous seas. In this state, success usually comes from learning chalk beds, badlands mudstones, and river gravels, then timing runoff, reservoir drawdown, surf cuts, or road work that exposes fresh fossil-bearing rock instead of hunting blindly.
Oklahoma Ammonite
cephalopod
Ammonite is a realistic Oklahoma fossil profile built around coiled marine shell with complex sutures from warm Cretaceous seas. In this state, success usually comes from learning chalk beds, badlands mudstones, and river gravels, then timing runoff, reservoir drawdown, surf cuts, or road work that exposes fresh fossil-bearing rock instead of hunting blindly.
Montana Ammonite
cephalopod
Ammonite is a realistic Montana fossil profile built around coiled marine shell with complex sutures from warm Cretaceous seas. In this state, success usually comes from learning dinosaur-bearing mudstones, glacial gravels, and marine shales, then timing runoff, reservoir drawdown, surf cuts, or road work that exposes fresh fossil-bearing rock instead of hunting blindly.
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