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Fossils like this illustrate how vegetation recovered and diversified after Earth’s greatest extinction events
Notable for its duckbill and a prominent cranial crest
Fossil Lake once covered nearly 930 square miles
alligators (2 species)
They were the first known creatures to develop a hard exoskeleton
4.4" Polished Slab Petoskey Stone Hexagonaria Coral Fossil Devonian Age Michigan Deinotherium Fossils like this illustrate howLocation: Michigan, United States Weight: 3. 8 Ounces Dimensions: 4. 4 Inches Long, 3. 8 Inches Wide, 0. 2 Inches Thick The item pictured is the one you will receive. Devonian Age, 350 million years old Petoskey Stones are unique rocks that also serve as fossils, specifically of the rugose coral Hexagonaria percarinata. Typically pebble shaped, these stones are found primarily in the northwestern and northeastern regions of Michigans Lower Peninsula.
