The Marshalltown Formation is a Mesozoic geologic formation. Dinosaur remains diagnostic to the genus level are among the fossils that have been recovered from the formation.
The Golconda Formation is a geologic formation in Kentucky. It preserves fossils dating back to the Carboniferous period. In Indiana, the Golconda, it is called the Golconda Limestone and is part of the Stephensport Group.
The Big Clifty Formation is a geologic formation in Indiana. It preserves fossils dating back to the Carboniferous period.
The Peedee Formation is a geologic formation in North and South Carolina. A marine deposit, named for exposures along the Great Peedee River, it preserves invertebrate and vertebrate fossils dating to the Late Cretaceous (Maastrichtian).
The Cuba Formation is a geologic formation in New York (state) and Pennsylvania. It preserves fossils dating back to the Famennian age.
The Rancocas Group is a geologic group in New Jersey. It preserves fossils dating back to the latest Cretaceous and the Paleogene period, meaning that it spans the Cretaceous-Paleogene boundary. It contains the Hornerstown Formation and the Vincentown Formation, with some treatments also including the Manasquan Formation within it.
The Tallahatta Formation is a geologic formation found on the surface in Alabama, Florida, Georgia, and Mississippi. It is also located in the subsurface of Kentucky. The Tallahatta formation is part of the Claiborne Group and contains four members: the Basic City Shale in Mississippi, the Holy Springs Sand Member in Mississippi, the Meridian Sand Member in Alabama and Mississippi, and the Neshoba Sand Member in Mississippi. It preserves fossils dating back to the Paleogene period, specifically the Eocene.
The Prairie Bluff Chalk is a geologic formation in Alabama and Mississippi. It preserves fossils dating back to the Cretaceous period.
The Franconia Formation is a geologic formation in the upper mid-western United States, with outcroppings found in Illinois, Indiana, Iowa, Michigan, Minnesota, Missouri, Ohio, and Wisconsin. It preserves fossils dating back to the Cambrian period. It was named the Franconia Formation due to the first published documentation of exposures in vicinity of Franconia, Minnesota in the 1897 Ph.D. dissertation by Charles P. Berkley at the University of Minnesota titled Geology of the St. Croix Dalles. The Franconian stratigraphic stage was named after this formation.
The Appanoose Formation is a geologic formation in Missouri. It preserves fossils dating back to the Carboniferous period.
The Morrow Formation is a geologic formation from the Pennsylvanian geological age that is found in locations ranging from Southeast New Mexico and West Texas to locations in Oklahoma, Southwestern Kansas, and Arkansas. It preserves fossils dating back to the Carboniferous period.
The Strawn Formation is a geologic formation in Texas and New Mexico. According to Cummins (1891), the formation was named from the town of Strawn in Palo Pinto County, Texas. It preserves fossils dating back to the Carboniferous period.
The Escondido Formation is a geologic formation in Texas and Coahuila, Mexico. It preserves fossils dating back to the Late Cretaceous period.
The Newcastle Sandstone is a geologic formation in Wyoming, United States. It preserves fossils dating back to the Late Cretaceous period.
The Gallup Sandstone is a geologic formation in the Gallup-Zuni basin of New Mexico. It preserves fossils dating back to the late Cretaceous period.
The Lehman Formation is a geologic formation in Utah. It preserves fossils dating back to the Ordovician period.
The Watahomigi Formation is a geologic formation in the Grand Canyon region of Arizona. It preserves fossils dating back to the Carboniferous period.
The Astoria Formation is a geologic formation in Washington state & Oregon. It preserves fossils dating back to the early to middle Miocene.
The Branch Canyon Formation is a geologic formation in California. It preserves fossils dating back to the Neogene period.
The Santa Susana Formation is a Paleogene period geologic formation in the Simi Hills and western Santa Susana Mountains of southern California.
New Jersey, 
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Delaware, 
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