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The Fox Hills Formation is a Cretaceous geologic formation in the northwestern Great Plains of North America. It is present from Alberta on the north to Colorado in the south. Fossil remains of dinosaurs , including tyrannosaurs , as well as large marine reptiles, such as mosasaurs , have been recovered from the formation.
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North Dakota is underlain by Precambrian crystalline basement rock, although these rocks are less well understood than in neighboring states. In the Proterozoic, a mountain range known as the Western Dakota Mobile Belt formed between two billion and 1.8 billion years ago in connection with the Trans-Hudson orogeny, stretching north into Manitoba and Saskatchewan before eroding almost entirely ...
The formation stretches over portions of Montana, North Dakota, South Dakota, and Wyoming. In Montana, the Hell Creek Formation overlies the Fox Hills Formation. Dinosaurs and pterosaurs of Hell Creek Formation. In 1966, the Hell Creek Fossil Area was designated as a National Natural Landmark by the National Park Service. [5]
County FIPS code [2] County seat [3] Est. [3] Etymology [4] Population [5] Area [3] [5] Map Adams County: 001: Hettinger: 1885: John Quincy Adams (1848-1919), a railroad agent and cousin of the former president who was instrumental in having the Chicago, Milwaukee and St. Paul Railway built through North Dakota
Pages in category "Cretaceous geology of North Dakota" The following 8 pages are in this category, out of 8 total. ... Fox Hills Formation; H. Hell Creek Formation; N.
Acipenser † Adocus Restorative model of the Late Cretaceous mammal Alphadon † Alphadon † Alphadon marshi † Altacreodus † Altacreodus magnus † Amersinia † Amersinia FU082 – informal † Amersinia FU82 – informal † Amesoneuron † Amesoneuron FU037 – informal † Amesoneuron FU37 – informal † Ampelopsis † Ampelopsis acerifolia † Anomia † Anomia gryphorhyncha ...
Unnamed county road across Cedar Creek, approximately 6 miles north and 11 miles east of Haynes 46°03′02″N 102°13′37″W / 46.050556°N 102.226944°W / 46.050556; -102.226944 ( Cedar Creek