Keywords: fossils yellowstone national park yellowstonenationalpark brachiopods text YELL-92017 and YELL-92024 (pictured here): Both the inarticulate (YELL-92017) and articulate brachiopods (YELL-92024) existed about 520 million years ago. The inarticulate was collected from the Park Shale, while the articulate brachiopod was collected on Mount Holmes from the Middle Cambrian Pilgrim Limestone within Yellowstone National Park. Collecting any natural resources, including rocks and fossils, is illegal in Yellowstone. Photo by Megan Norr; 2016; Catalog #20788d; Original #YELL_92024 YELL-92017 and YELL-92024 (pictured here): Both the inarticulate (YELL-92017) and articulate brachiopods (YELL-92024) existed about 520 million years ago. The inarticulate was collected from the Park Shale, while the articulate brachiopod was collected on Mount Holmes from the Middle Cambrian Pilgrim Limestone within Yellowstone National Park. Collecting any natural resources, including rocks and fossils, is illegal in Yellowstone. Photo by Megan Norr; 2016; Catalog #20788d; Original #YELL_92024 |