Potomac Group | |
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Stratigraphic range: Cretaceous, | |
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Type | Group |
Sub-units | Patuxent Formation, Arundel Formation, Patapsco Formation, Raritan Formation, Potomac Formation (?) |
Underlies | Raritan Formation, Magothy Formation |
Overlies | Boonton Formation |
Location | |
Region | ![]() ![]() ![]() ![]() |
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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. [1] The Potomac Group was initially believed to have been Late Jurassic in age by Othniel Charles Marsh [2] but later studies, such as Clark (1897), have found that the Potomac Group is in fact Early- Late Cretaceous ( Aptian- Turonian) in age. [3]
Potomac Group | |
---|---|
Stratigraphic range: Cretaceous, | |
![]() | |
Type | Group |
Sub-units | Patuxent Formation, Arundel Formation, Patapsco Formation, Raritan Formation, Potomac Formation (?) |
Underlies | Raritan Formation, Magothy Formation |
Overlies | Boonton Formation |
Location | |
Region | ![]() ![]() ![]() ![]() |
Country | ![]() |
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. [1] The Potomac Group was initially believed to have been Late Jurassic in age by Othniel Charles Marsh [2] but later studies, such as Clark (1897), have found that the Potomac Group is in fact Early- Late Cretaceous ( Aptian- Turonian) in age. [3]