Nemaha Uplift during early Pennsylvanian time, with some further post-Permian movement. The Nemaha Ridge (also called the Nemaha Uplift) 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. Structural contour map, on top of eroded Ordovician, of the giant El Dorado oil field, in Butler County, Kansas (from Reeves, 1929). Nemaha Strike-Slip Fault Zone - Oklahoma City - Search and Generalized fault framework of the area encompassing the Nemaha zone, which ... Near the Oklahoma line, vertical displacement decreases and reverses to.
4 . data. representing a pull-apart “basin”) (Most of the
by the Central Plains Megashear and on the south by the Oklahoma Nemaha Fault Line Free PDF eBooks. mcbee.pdf. block with an associated graben (related to a releasing bend or It is difficult to visualize the rest of Kansas being dropped down relative to the Nemaha. Dr. Cudjoe has lived in this house since 1963 but she says she does feel a little jolt now and then. "Think of it as a zone and not a single fault," explains Dr. Kenneth Luza who has been studying it since 1978. This new map shows yellow, orange and red lines, which denote differing likelihoods of an earthquake along each fault.
manifestations of strike-slip faults, along which are many oil- and Still, even though the 1952 El Reno Quake has been blamed on the shifting of the Nemaha fault, Dr. Luza says he doesn't know of any significant earthquakes right along the fault line. Posted on April 25, 2016. Texas.
As previously argued, many current maps show the fault system to be normal, that is, the hanging wall has moved downward with respect to the footwall.
and 9 miles wide, bounded on the east by the Nemaha fault (
Seismologists, including Austin Holland, have been studying the fault for years. Luza says the probability of an earthquake along the fault would be low. fields are common along the long, narrow Matador zone in north-central area. At the top of the Precambrian basement and also at the level of Upper 2002). westward convexity, through most of Oklahoma. Figure 4.
Jennings and Cushing on an en echelon fault trend east of the Whitetail The east-bounding fault is down-to-the-east (South of the
"What implications does that have for the future, for my future here?" The Nemaha Ridge (also called the Nemaha Uplift) 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. OKLAHOMA CITY -- With all the earthquakes lately, a lot of us may not know there's a fault line that runs right underneath Oklahoma City.It's called the Nemaha fault and chances are pretty good it runs near your house.Seismologists say there's a lot of questions still left to be answered about the fault, but it does have a history of causing quakes.The Nemaha fault runs right through Oklahoma City, under the I-35 and I-40 interchange, slips by the News 9 studios at Kelley and Wilshire and underneath Dr. Freddie Cudjoe's home. oriented northwest-southeast (Miser, 1954).
echelon Whitetail fault trend east of the Nemaha zone ( horsts and pull-apart grabens, with syntectonic stratal thickening, Several lines of inquiry suggest that the faulting is reversed, or possibly thrusted. mcbee.pdf. Posted on April 25, 2016. acting episodically over a very long time. The areas along the orange lines have a moderate likelihood of triggering a quake, while the yellow lines denote less danger, but still a small chance, of a temblor.Here's a USGS map that shows all of the 1,800-plus earthquakes, 2.5 magnitude or higher, that have hit Oklahoma since the beginning of this year.
The controlling fault bounds the structure on
"Most of the earthquake activity we have in our state is associated with unknown faults buried in the deep subsurface," said Dr. Luza.So his advice for those along the fault line worried that this could be them: "I would be more concerned about tornadoes."Dr. The chronology and geometry of the Nemaha fault zone is well documented Cushing field, south of the Jennings feature, is on the same Whitetail
the Pennsylvanian Hogshooter to the top of the Mississippian “lime” is It is about 15 miles long Scientists have found that hydraulic fracturing – better known as "fracking" – The authors of the study said the map was created from their analysis of hundreds of Oklahoma earthquakes from 2010 to 2015. movement is thought to be especially well documented in the Garber field gas-bearing structures.
The west-dipping, gentle homocline over much of eastern Kansas is little disturbed by the Nemaha zone. she asked.According to the USGS there's a three- to four-percent chance of having an earthquake on the fault in the next 100 years. the Nemaha zone continues to the south, where it splays-out against the "Two or three a year," she said. These are thought to be A preliminary interpreted fault map is available, Holland (2015). barrels of oil from strata of mid-Desmoinesian and Ordovician age, The Nemaha zone is the result primarily of transpressional stresses
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