Where is the Niobrara formation?
The type locality for the Niobrara Chalk is the Niobrara River in Knox County in northeastern Nebraska. The formation gives its name to the Niobrara cycle of the Western Inerio Seaway….Niobrara Formation.
| Niobrara Formation Stratigraphic range: Coniacian–Campanian PreꞒ Ꞓ O S D C P T J K Pg N | |
|---|---|
| Named for | Niobrara River, Knox Co., Nebraska |
How did the Niobrara Formation form?
The chalk formed from the accumulation of coccoliths from microorganisms living in what was once the Western Interior Seaway, an inland sea that divided the continent of North America during much of the Cretaceous. It underlies much of the Great Plains of the US and Canada.
How was the Denver basin formed?
The basin started forming as early as 300 million years ago, during the Colorado orogeny that created the Ancestral Rockies. The basin later became filled with sediment eroded from the Rockies. The Front Range peaks rise approximately 22,000 ft (6600 m) from the floor of the basin under Denver.
Where is the DJ Basin located?
Colorado
Background Information about the Niobrara-DJ Basin. The Niobrara-DJ Basin is a crude oil and liquids rich gas play that is located in Northeast Colorado and Southeast Wyoming. The Niobrara is located in several areas of the Rocky Mountains, including the Powder River in Wyoming and in parts of Northwest Colorado.
What does Dakota sandstone look like?
Over the range of the usage of the Dakota name, the unit is primarily known for its massive beds of sandstone, which commonly shows shades of red, but also gray, yellow, or white.
When was the Pierre Shale unit deposited?
70-80 million years ago
The Pierre Shale is the youngest Cretaceous unit in the state of Nebraska. It was deposited during the Campanian and Maastrichtian (~70-80 million years ago).
What oil basin is in Colorado?
Denver Basin
Colorado’s main oil- and natural gas-producing regions are the Denver Basin in northeastern Colorado and the Piceance Basin in western Colorado. The San Juan Basin that stretches across the Colorado-New Mexico border was once a major natural gas-producing area, but output from that area has declined in recent years.
Is there oil wells in Colorado?
Drilling has been an important part of the state’s economy ever since; as of 2019, Colorado ranked in the sixth and seventh in the nation for oil and natural gas production, respectively. There are about 7,400 public-land wells capable of producing oil or gas in Colorado, according to the Bureau of Land Management.
What does the word Niobrara mean?
(ˌnaiəˈbrɛərə) noun. a river flowing E from E Wyoming through Nebraska to the Missouri.
What is the Niobrara River?
Niobrara River, river rising near Lusk, in Niobrara county, eastern Wyoming, U.S., and flowing east across the High Plains, the northern edge of the Sand Hills, and the eastern plains of Nebraska to join the Missouri River near the village of Niobrara, Neb., at the South Dakota state line.
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