| Fall River Sandstone | |
|---|---|
| Stratigraphic range: Cretaceous | |
| Type | Formation |
| Location | |
| Region | Nebraska |
| Country | United States |
The Fall River Sandstone is a geologic formation in Nebraska, United States. It preserves fossils dating back to the Cretaceous period.
Protosphargis is an extinct genus of sea turtle from the Upper Cretaceous of Italy. It was first named by Capellini in 1884.
The Potomac Group is a geologic group in Delaware, Maryland, New Jersey, and Virginia. It preserves fossils dating back to the Cretaceous period. An indeterminate tyrannosauroid and Priconodon crassus, a nodosaurid, are known from indeterminate sediments belonging to the Potomac Group. The Potomac Group was initially believed to have been Late Jurassic in age by Othniel Charles Marsh but later studies, such as Clark (1897), have found that the Potomac Group is in fact Early-Late Cretaceous (Aptian-Turonian) in age.
The Tuscaloosa Formation is a geologic formation in Alabama. It preserves fossils dating back to the Cretaceous period.
The Navarro Group is a geologic group in Arkansas, Texas and Coahuila, Mexico. It preserves fossils dating back to the Cretaceous period.
The Taylor Group is a geologic group in Arkansas. It preserves fossils dating back to the Cretaceous period.
The Coleraine Formation is a geologic formation in Minnesota. It preserves fossils dating back to the Cretaceous period.
The Montana Group is a geologic group in South Dakota. It preserves fossils dating back to the Cretaceous period.
The Huntsman Shale is a geologic formation in Nebraska. It preserves fossils dating back to the Cretaceous period.
The Del Rio Formation is a geologic formation in Texas. It preserves fossils dating back to the Cretaceous period.
The Atco Formation is a geologic formation in Texas. It preserves fossils dating back to the Cretaceous period.
The Walnut Formation is a geologic formation in Texas. It preserves fossils dating back to the Cretaceous period.
The Grayson Formation is a geologic formation in Texas. It preserves fossils dating back to the Cretaceous period.
The Kemp Clay is a geologic formation in Texas. It preserves fossils dating back to the Cretaceous period.
The Edwards Group is a geologic group in Texas. It preserves fossils dating back to the Cretaceous period.
The Washita Group is a geologic group in Texas. It preserves fossils dating back to the Cretaceous period.
The Shell Creek Shale is a geologic formation in Montana. It preserves fossils dating back to the Cretaceous period.
The Aspen Shale is a geologic formation in Wyoming, United States. It preserves fossils dating back to the Cretaceous period.
The Rock Springs Formation is a geologic formation in Wyoming. It preserves fossils dating back to the Cretaceous period.
The Sage Junction Formation is a geologic formation in Idaho. It preserves fossils dating back to the Cretaceous period.
The Durlston Formation is a geologic formation in England. Particularly in the Isle of Purbeck. It preserves fossils dating back to the Berriasian stage of the Lower Cretaceous.
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