15Fossil sites
Rust Formation
Rust Formation in the United States: 15 fossil sites. Typical age: 471–458 million years (Ordovician).
15Fossil sites
43Finds
471–458 million yearsTypical age
OrdovicianMain period
Where its fossils were found
Ordovician
By geological period
Ordovician15
What was found
Trilobites · 43Ceraurus, Isotelus, Meadowtownella, Flexicalymene (Flexicalymene), Calyptaulax, Achatella, Hypodicranotus, Diacanthaspis, Sphaerocoryphe, Thaleops, Amphilichas, Bumastoides
Towns with the most fossil sites nearby
Other formations of the same period
Ordovician
Kindblade Formation 262Kope Formation 254Lexington Limestone 228Antelope Valley Formation 223Waynesville Formation 214Martinsburg Formation 180Garden City Formation 117Fairview Formation 117Whitewater Formation 108Kangaroo Creek Formation 108Fillmore Limestone 104McMillan Formation 101Valcour Formation 97Crown Point Formation 95Liberty Formation 88Welling Formation 77Day Point Formation 76Denley Limestone 65Ninemile Formation 63Clays Ferry 63Phi Kappa Formation 59Sunset Formation 59Bromide Formation 58Edinburg Formation 56