Nemaha Ridge - Misplaced Pages

(Redirected from Nemaha Fault) Geological fault in Kansas, US

The Nemaha Ridge (also called the Nemaha Uplift and the Nemaha Anticline) is located in the Central United States. It is a buried structural zone associated with a granite high in the Pre-Cambrian basement that extends from approximately Omaha, Nebraska to Oklahoma City, Oklahoma. The ridge is associated with the seismically active Humboldt Fault zone. It is also associated with the Proterozoic Midcontinent Rift System, which extends into northern Kansas about fifty miles west of the Nemaha.

Along the Nemaha Ridge is a series of faults referred to as the "Nemaha Fault Zone". The long term uplift along the ridge has been attributed to isostatic uplift due to the anomalously thick crust adjacent to the Midcontinent Rift.

References

Daniel F. Merriam (1963). The Geologic History of Kansas, Kansas Geological Survey, Bulletin 162. University of Kansas Publications, State Geological Survey of Kansas. The Nemaha Anticline, probably the most famous of all Kansas structures, ... crosses Kansas from Nemaha County on the north to Sumner County on the south and extends into Nebraska and Oklahoma.
^ Kansas Geological Survey, Current Research in Earth Sciences, Bulletin 250, part 1 "Review of the Nemaha Ridge: A New Look at an Old Structure"
"Nemaha Strike-Slip Fault Expression on 3-D Seismic Data in SCOOP Trend". AAPG EXPLORER. 2018-06-01. Retrieved 2018-07-25.
Old Rifts Never Die: Crustal Thickening Across the Midcontinent Rift and Its Possible Role in Post-Rifting Tectonics, Gao, Stephen S., et al., Structure and Tectonics of the Midcontinent, North America, GSA 2002 Denver Annual Meeting

Major seismically active faults of North America

North America
(crosses national borders)

Aleutian Trench (US–RU)
Basin and Range Province (US–MX)
Canadian Arctic Rift System (CA–GL)
Cascadia subduction zone (US–CA)
Clarendon-Linden fault system (US–CA)
Denali Fault (US–CA)
Northern Cordilleran Volcanic Province (CA–US)
Puget Sound faults (US–CA)
Rio Grande rift (US–MX)
San Andreas Fault (US–MX)
Southern Great Lakes seismic zone (US–CA)
Tintina Fault (US–CA)

Canada

United States

Washington and Oregon	Brothers Fault Zone Olympic–Wallowa lineament Puget Sound (Seattle Fault, Tacoma Fault) Walker Lane
California	Calaveras Fault Garlock Fault Hayward Fault Zone Mendocino Fracture Zone Newport–Inglewood Fault Puente Hills Fault Rose Canyon Fault San Jacinto Fault Zone (Elsinore Fault Zone)
Great Basin	Independence Valley fault system Moab Fault Teton Fault Wasatch Fault
Great Plains	Humboldt Fault Long Point–Eureka Heights fault system Meers Fault Nemaha Fault Zone
Midwest	Marianna Fault New Madrid seismic zone Sandwich Fault Zone Wabash Valley seismic zone
Appalachian Mountains and Atlantic Coast	Eastern Tennessee seismic zone Northern Appalachians seismic zone Ramapo Fault Virginia seismic zones

Caribbean and Mexico

Cayman Trough
Chixoy-Polochic Fault
Enriquillo–Plantain Garden fault zone (Cuba)
Gulf of California Rift Zone
Lesser Antilles subduction zone
Middle America Trench (Central America)
Motagua Fault (Central America)
Pedro Miguel Fault
Puerto Rico Trench

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References