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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 Patapsco Formation is a geologic formation of varigated clays, sandy clays, and sand in Virginia, the District of Columbia, Maryland, Delaware, Pennsylvania, and in the subsurface of New Jersey. [1] [2] It preserves fossils such as plants and molluscs dating back to the Cretaceous period. [1]
Lafayette Township is a township located in the Skylands Region of Sussex County, in the U.S. state of New Jersey.As of the 2020 United States census, the township's population was 2,358, [8] a decrease of 180 (−7.1%) from the 2010 census count of 2,538, [17] [18] which in turn reflected an increase of 238 (+10.3%) from the 2,300 counted in the 2000 census. [19]
The name was coined by T.A Conrad, 1839 in the New York State Geological Survey Annual Report. Named for the Helderberg Escarpment or Helderberg Mountains. [1] The upper portion of the Helderberg, or the Kalkberg Formation is host to the Bald Hill ash bed, dated to 417.6 million years ago. [2] The Helderberg is composed chiefly of limestone and ...
The geology of Virginia began to form at least 1.8 billion years ago. The oldest rocks in the state were metamorphosed during the Grenville orogeny , a mountain-building event beginning 1.2 billion years ago in the Proterozoic , which obscured older rocks.
Thecachampsa crocodile coprolite from Aquia Formation, King George County, Virginia) The Aquia Formation is a geologic sandstone formation that extends from the upper Chesapeake Bay to the James River near Hopewell, Virginia. [1] It consists of clayey, silty, very shelly, glauconitic sand. [1]
The Atlantic Seaboard Fall Line, or Fall Zone, is a 900-mile (1,400 km) escarpment where the Piedmont and Atlantic coastal plain meet in the eastern United States. [2] Much of the Atlantic Seaboard fall line passes through areas where no evidence of faulting is present.
Physiographic Provinces of New Jersey. New Jersey is a very geologically and geographically diverse region in the United States' Middle Atlantic region, offering variety from the Appalachian Mountains and the Highlands in the state's northwest, to the Atlantic Coastal Plain region that encompasses both the Pine Barrens and the Jersey Shore.