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In 1991 and 1992 the U.S. Geological Survey along with others including the Iowa Geological Survey conducted detailed research in part to test the possible connection of the Manson impact structure with the Cretaceous–Paleogene extinction event. The 40 Ar / 39
U.S. Geological Survey aerial resistivity map of the Decorah, Iowa area, showing the Decorah crater.. A much older meteorite strike created the Decorah crater during the Middle Ordovician Period, 470 million years ago.
Also, a variety of useful command-line utilities is provided for translating LAS files from one version of the LAS format to another, inspecting header information, and translating LAS data to and from text. Initial development of libLAS software was supported by the Iowa Geological Survey of the Iowa DNR for use in its statewide lidar project.
Aquifer mapping: The Iowa Geological Survey will receive $250,000 to map and assess the conditions of the state's underground aquifers, including measuring the volume of groundwater available in ...
The Lithograph City Formation is a geologic formation in Iowa, part of the Cedar Valley Group. It preserves fossils dating back to the Devonian period. The formation is composed of dolomite and limestone, with many fossils and vugs in the lower part, while the upper part contains few fossils. [1] [2]
A well-defined band of pahas runs between Mount Vernon and Martelle, Iowa and is crossed by Iowa Highway 1. Most are in Benton, Linn, Johnson and Jones counties. [citation needed] Casey's Paha State Preserve in Hickory Hills County Park, Tama County, Iowa preserves the southeast end of a 2-mile (3.2 km) long paha. [12]
U.S. Geological Survey Geographic Names Information System: Des Moines River The Des Moines River ( / d ə ˈ m ɔɪ n / ⓘ ) is a tributary of the Mississippi River in the upper Midwestern United States that is approximately 525 miles (845 km) long from its farther headwaters. [ 2 ]
Iowans who oppose Summit Carbon Solutions’ proposed $8 billion carbon capture pipeline say the project would consume 3.36 billion gallons of water annually, with most of it coming from deep ...