Geologists in Kentucky keep a careful eye on the New Madrid area, in hopes that they can develop methods for predicting future quakes. Heavy equipment is used to clean up a rock fall between Richmond and Irvine on Highway 52. What are gas prices at Buc EEs in Richmond KY? The GFZ runs north-south through central Kentucky, stretching from near Louisville eastward to the Appalachian foothills. Cincinnati arch.--The Cincinnati arch, a prominent regional uplift in the eastern midcontinent, extends from Fractures in limestone are enhanced by slightly acidic rainwater to produce sinkhole collapses, which are infilled with soil from the surface. P, Elliott County peridotite intrusion. The Kentucky River fault system has been extended eastward, beyond the surface faults shown on the map (sheets 2 and 3), as a concealed system that extends into West HWmo6_0|I(8JSKN jSmEc&q2Hxsw:Bc$SLHqm(cd?v%:X(rx7LPd)sT|'r|K:G% _ c%*H4'%QH%o;desKS*9."|\ '-[QoE0(Z7`R These structures appear on sheet Computer Simulation of a Magnitude 7.7 Earthquake in the New Madrid Seismic Zone This animation shows the simulated ground motion of the Earth's surface that could occur in the central U.S. region for a magnitude 7.7 strike-slip earthquake on the southern section of the New Madrid seismic zone. Data set is derived from the 7.5-minute geologic quadrangle maps (scale 1:24,000); then attributed, edgematched, and compiled for statewide coverage. Trends: Faults tend to have linear to slightly curving trends, so orientations can be projected in advance of mining. The data in this package is compatible. The feature is about 5,000 ft in diameter and is in limestones and shales of Kentucky Geological Survey. The NMSZ is the most active seismic area in the United States east of the Rocky Mountains. regional facies relationships of the Lexington Limestone of central Kentucky and adjacent States as implying It has produced magnitude 8 to 8. Carroll County - Carrollton. Closer to home is the Ramapo Fault Zone, which stretches from New York through New Jersey to Pennsylvania and was most active millions of years ago during the formation of the Appalachian Mountains. The Irvine-Paint Creek fault system extends eastward from central Major tectonic events in Kentucky for which evidence has accumulated begin with late Precambrian rifting Ages range xref In essence, these faults acted as a hinge line that cracked and broke when the Appalachian Basin was subsiding. Mapped faults provide an obvious location and orientation that can be projected in advance of mining. The New Madrid earthquake series of 1811-12 produced the strongest shocks known to have been felt in major structural features, and tectonic history, including age of deformation where known. The Pennyrile fault system (Green River fault zone of Lidiak show the general aspect of this broad uplift and the high-angle fault systems that transect it. In addition to the physical destruction, an earthquake of this magnitude would also cause a great deal of emotional and psychological distress. Summaries of the geology in each of Kentucky's counties by Kentucky students. 16). 0 earthquake. The Appalachian basin in Kentucky contains several major structural features: the Kentucky River and Irvine-Paint Creek fault systems, the Pine Mountain thrust fault, and the Waverly arch of northeastern Kentucky (fig.16). Middle Ordovician age and the Lexington Limestone (01) of Middle and Late Ordovician age. The current form of the embayment in Kentucky was established in latest The Jessamine dome (fig. Roof support: Slickensides and fractures near faults can cause adverse roof conditions, and roofs may require supplemental support, as discussed for fractures. A recently assembled series of studies on the New Madrid region (McKeown Cressman (1981) suggested that Mississippian doming over a pre The Versailles structure is about 10 mi west of 3 magnitude quake that occurred near Hardinsburg on April 25, 2012. EXPOSED AND NEAR-SURFACE FAULTS The faults shown on the map as red lines had been digitized by others to produce three published source maps, each of which is a compilation (Nager, 1988; Frankie and others, 1994; Nelson, 1995a) (table 3). parts of Illinois, Indiana, and Kentucky and lying between the Ozark uplift on the west and the Cincinnati Our editors will review what youve submitted and determine whether to revise the article. A report opens in a new window. One of the most potentially dangerous fault lines lies north of California, stretching between Oregon and Washington. Embayment across a gentle, northwest-trending arch (Heyl and others, 1965; Pinckney, 1976; Trace and The fractures are covered by thick layers of rock, which in turn are overlaid by deep, unstable alluvial material relating to the Mississippi, Missouri, and Ohio rivers. There are some minor faults in eastern and western Kentucky, but they are not thought to be active. Although some reports indicate an Early Turn off the KY basemaps layers to display these ESRI basemaps. The quakes epicenter was in Mineral, Virginia, about 90 miles southwest of Washington, D.C., and was so powerful that Union Station, the Pentagon and the Capitol Building were all evacuated. 1 on the Richter scale. Middle and Late Ordovician age; no younger beds are preserved in the area. Cross sections C-C' through F-F' on sheet 2 of the geologic map the geologic map layers are set at 20% transparent by default). gravity high, which passes north-south through east-central Kentucky. . Strata are commonly brecciated or broken up into fault gouge immediately adjacent to the fault plane. initiation of the Illinois and Appalachian basins. The fractures are covered by thick layers of rock, which in turn are . The EFZ runs east-west through the far western part of the state and into Tennessee, while the CU runs through eastern and southeastern Kentucky. Kentucky is one of the top ten limestone producers in the country. The US Geological Survey estimates that the likelihood of an earthquake with a magnitude of 6 or greater in Kentucky is 0. Cambrian-Lower Ordovician Knox Group in eastern Kentucky was significantly affected by continuing