How deep is the Niobrara Formation?

between 6,000 and 10,000 feet deep
The Niobrara occupies a zone between 6,000 and 10,000 feet deep, and the aim is to collect data from 153,000 points to map that strata. All that will be used by Geokinetics, and its partner Geophysical Pursuit, to create a 3-D seismic map for their clients.

How is Niobrara Chalk formed?

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.

Where is the Niobrara Formation?

The Niobrara Formation, commonly referred to as the Niobrara Shale, but also known as the Niobrara Chalk, was deposited in the Western Interior Seaway in the middle of North America during late Cretaceous Age.

What type of rock makes up the Niobrara Formation?

The Niobrara Formation is a fine-grained marine rock deposited in the Western Interior Seaway during the Late Cretaceous. It is composed of fossil-rich interlayered shale, marls, and chalks.

How old is the Pierre Shale?

Pierre Shale, division of Upper Cretaceous rocks in the United States (the Cretaceous Period lasted from about 146 million to 65.5 million years ago). Named for exposures studied near old Fort Pierre, S.D., the Pierre Shale occurs in South Dakota, Montana, Colorado, Minnesota, New Mexico, Wyoming, and Nebraska.

How old is the Niobrara River?

It was formed in a marine environment 70-76 million years ago.

Is chalk a rock or mineral?

sedimentary rock
Chalk is an extremely soft sedimentary rock that forms under the sea due to the gradual accumulation of plates of calcite (a mineral form of calcium carbonate) and very small amounts of clay and silt.

Where are chalk rocks found?

Such deposits occur in western Europe south of Sweden and in England, notably in the chalk cliffs of Dover along the English Channel. Other extensive deposits occur in the United States from South Dakota south to Texas and eastward to Alabama.

Where is the Niobrara oil field?

Northeast Colorado
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 is the rock that makes up the Dakota Formation?

Cheyenne Sandstone
The Dakota aquifer is composed of the Cheyenne Sandstone, and the Dakota and Kiowa Formations, and is overlain by the Graneros Shale (Table 1). The Cheyenne Sandstone consists predominantly of cross-bedded, fine to medium sandstone with lenses of shale and conglomerate.

What type of rock is Pierre Shale?

The Pierre Shale is of marine origin and was deposited in the Western Interior Seaway….Pierre Shale.

How thick is the Pierre Shale?

The thickness of the Pierre Shale ranges from 5,200 feet in the Kassler quadrangle to more than 8,000 feet northeast of Boqlder. This northward increase in thickness coincides with a northward increase in sandiness.