map of fault lines in kentuckyaffordable wellness retreats 2021 california

Denison and others (1984, fig. KGS Home > Geology of Kentucky (1983, p. 24). stratigraphy or sedimentation of the Ordovician rocks that can be related to the arch (Cressman, 1973, p. 8; 11) and continue mining. Prior site planning that takes geology into account is always preferable to dealing with problems after a structure is built. response to some later event, formed along the western margin of the gravity high (Lidiak and Zeitz, 1976; northeastern Kentucky (Dever and others, 1977). failed arm (the "Reelfoot rift") of a late Precambrian triple junction. does not extend westward of the Lexington fault zone. 2 of the geologic map; the Irvine-Paint Creek fault system extends well into sheet 3 as well. surveys of the area (Black and others, 1977) show a close relationship between gravity and magnetic data These include (A) rotational faults (glide planes) bounding paleoslumps, (B) compactional faults along cutout (paleochannel) margins and around or beneath roof rolls, and (C) clay-vein faults. Still, this quake caused significant damage to homes and infrastructure in the area, with an estimated $3 million worth of damages. Drag folding and steepened bed dips (with possible bedding-plane movement along beds) near faults can also lead to roof weakness. Breckinridge County - Hardinsburg. from the Illinois and Michigan basins. However, there is evidence that Kentucky may be experiencing a spike in seismic activity since 2009, with more frequent tremors occurring throughout the state. The fault shown cutting the Cincinnati Arch in the block diagram is part of the Lexington Fault Zone. Summaries of the geology in each of Kentucky's counties by Kentucky students. Likewise, movement along a fault plane is not always uniform, so the amount of offset may change laterally. Lying in the central area of the North American Plate, the seismic zone is about 45 miles (70 km) wide and about 125 miles (200 km) long. 133 0 obj <> endobj Rock excavation is often required to sufficiently bury these pipelines. The downbow in western Kentucky is part of the Illinois (also called Eastern Interior) Basin, which extends into Illinois and Indiana. Seismologists say we can expect the next one any day now. Fun times! In essence, these faults acted as a hinge line that cracked and broke when the Appalachian Basin was subsiding. Thousands of earthquakes have been recorded in this region since 1974. 198 earthquakes in the past 365 days. 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. section B-B' on sheet I of the geologic map). Modifications to the landscape require careful planning to mitigate negative impacts. The arch continued 0000001642 00000 n McKeown Reverse or thrust faults are faults in which one side is moved upward relative to the other side. now = new Date; There, the Devonian (red on the section) and Mississippian (light blue on the section) strata appear to split upward on the eastern (right) side of the diagram. shatter cones and other features. Webb (1969) and Silberman (1972) have interpreted subsurface data as Rock movement along fault lines might be reactivated during an earthquake. Turn off the KY basemaps layers to display these ESRI basemaps. There are no active plate tectonic movements in this area at the present time, and as such, there are no active fault lines. The fractures are covered by thick layers of rock, which in turn are . In most cases, faulting impedes mining and forms the boundary of a mine, so adverse roof conditions adjacent to faults lead to entries along mine boundaries being abandoned. The epicenter of the quake was located about 10 miles from the city of Ridgecrest and was located about 124 miles northeast of Los Angeles. East of the fluorspar faults there are two sets of faults that trend east-west. While every effort has been made to follow citation style rules, there may be some discrepancies. document.write(thisYr); The town of Middlesboro, in far southeastern Kentucky (sheet 3), is located in a topographic basin that is the Hawaii sits atop the Ring of Fire and experiences around 900 earthquakes each year. beyond the surface faults shown on the map (sheets 2 and 3), as a concealed system that extends into West migration of an arch through northeastern Kentucky in the Late Cambrian and Early Ordovician; they may have originated much earlier, however: Schwalb (1969, p. 9) identified a Cambrian-Ordovician basin of Although some reports indicate an Early Exploration for oil and gas in Kentucky has resulted in considerable information on the nature of the This fracturing may influence slope stability and groundwater flow in these limited areas. The faults shown on the Madison County map represent seismic activity that occurred several million years ago at the latest. These faults were pathways for mineral-rich fluids, which deposited many types of minerals including fluorite. California experiences thousands of earthquakes each year, many of which cause moderate to significant damage. Some seismologists believe that the maximum magnitude for a quake is 9. The pressures from mountain building caused the northeast edge of a block of Devonian, Mississippian, and Pennsylvanian strata to be pushed upward, forming a 125-mile long ridge that we call Pine Mountain. amphibolites, and mafic granulites are found in the vicinity of highs. The fault system runs from the Mississippi Delta, through Arkansas, Tennessee, Mississippi, and Kentucky. inclusion of the Cumberland thrust sheet of southeasternmost Kentucky in the fold-and-thrust province. and especially in western Kentucky. Thankfully, the area was not as populated as it is now, so the damage was limited. Omissions? Thousands of milder aftershocks occurred daily for more than a year. A description of meteor impact sites and other interesting features. The last time the VSZ caused so much chaos was in 1867 when it released an earthquake of 5.6-magnitude the strongest in Virginias history. Solid lines indicate fault traces. Ponds constructed in dry weather are more apt to leak than ponds constructed in wet weather. Yes, there have been 10. Contact the Webmaster for questions and comments. River fault system largely predate Pennsylvanian deposition and are thus not readily apparent on the Rough Creek fault system through at least Early Permian time. (See New Madrid earthquakes of 181112.). Output includes the KY county and KY 1:24,000 quadrangle where the coordinate is located and links to map views. //--> In eastern Kentucky, surface faults are relatively well mapped and relatively far . Despite these studies, the seismic activity in Kentucky remains relatively low in comparison to other areas of the United States, and there is no evidence that highly destructive seismic activity is likely in the near future. Last modified In the fall of 1996, ESEN was expanded to provide resources from around the globe using the World Wide Web. sheet I of the geologic map). province, and a western mildly deformed part referred to as the Appalachian Plateaus; the latter include the Successful pond construction must prevent water from seeping through structured soils into limestone solution channels below. The age is closely constrained: disturbed beds include The cross section shows numerous faults cutting across and offsetting the strata beneath the surface of Kentucky. The surface traces of faults are shown as black line segments on the geologic map, and offsets along some of the major faults are shown in the block diagram. structure, about midway between Louisville and Lexington (sheet 2), is 14,000 ft in diameter. We are currently working on a solution for this issue. Faults may be associated with increased fracturing of bedrock in the immediately adjacent area. In addition, Keller and others (1982) The feature is about 5,000 ft in diameter and is in limestones and shales of Cambrian-Lower Ordovician Knox Group in eastern Kentucky was significantly affected by continuing Strike-slip (also called translational or transform) faults are faults in which blocks of the earths crust are moving sideways along the fault plane. The following brief descriptions of the four structural provinces include discussions of their regional setting, 8). magnitude mb has been estimated to be 7.4 (Nuttli, 1979). An uplifting experience that will not be appreciated! Major cities like Portland, Seattle and Vancouver lie along the Cascadia Subduction Zone, which scientists say has the capability of a 9.0 or 10 magnitude earthquake 16 times more powerful than the 1906 quake which ravaged San Francisco. 0 earthquake. Output is the same text file with the converted values and the KY county and KY 1:24,000 quadrangle where a coordinate is located. extensive denudation. Late Paleozoic (Alleghenian) thrusting in southeasternmost The death toll likely would have been much higher if the quake had lasted any longer. 19 earthquakes in the past 30 days. 3 earthquakes in the past 7 days. Quadrangle In Mississippi, the fault line passes through the following counties: Tishomingo, Itawamba, Pontotoc, Prentiss, as well as part of Tippah and Alcorn counties. No major damage was reported, although numerous cracks and water leaks appeared in homes in Hardinsburg. How likely is Kentucky to have an earthquake? Throughout the county ground water is hard or very hard and may contain salt or hydrogen sulfide, especially at depths greater than 100 feet. To select data from a rectangular area, hold the Ctrl key (use Cmd key on Macs) and drag the pointer. The origin of the Muldraugh dome is uncertain. Right: With time, expanding soils exert several tons per square foot of pressure on the foundation and shallow pilings. in the western part of the Appalachian basin. A map of global tectonic and volcanic activity over the last one million years, showing: active ridges, continental extensions, transform faults, ridge spreading rates and directions, continental rifts, subduction and overthrust zones, and generalized volcanic activity. fields indicate dip-slip movement (Palmer, 1969). (Photo by Paul Howell). These fault lines are all part of the larger New Madrid Seismic Zone, a region spanning 7 states and known for its earthquake activity. KY basemap layers are displayed above these ESRI basemaps. Geological Survey OF-89-0106, Plate 11, 151 p. Carey, D.I., and Stickney, J.F., 2001, Ground-water resources of Madison County, Kentucky: Kentucky Geological Survey, Open-file Report OF-01-73, 30 p. Blue Grass Area Development District, 2003. It was the first major seismic activity in Ky since 2003 when a magnitude 4. Fish and Wildlife, 2003, National Wetlands Inventory, http://www.nwi.fws.gov/, Copyright 2003 by the University of Kentucky, Kentucky Geological Survey. 0000000476 00000 n Ervin and McGinnis (1975) suggested, largely on the reports indicate that, although the most severe earthquakes (New Madrid type) may occur only every 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. Surface faults are well mapped, but unmapped faults or splinter faults branching from mapped faults are sometimes encountered. The most powerful earthquake to be ever recorded was a 9. Virginia (Dever and others, 1977). Without remedial measures, the house will actually become deformed and shatter masonry and windows. gneiss, two-feldspar granite, medium-grade metamorphic rock, and anorthosite, while west of the front of the Cumberland Plateau and is represented at the surface mainly by strata of Pennsylvanian age. Faults represent breaks in the Earth's crust. rifting in eastern Kentucky (Rome trough: Harris, 1975; Ammerman and Keller, 1979) and post-Ordovician Rock excavation may be required in areas with shallow soil (excavation was not required here). show the general aspect of this broad uplift and the high-angle fault systems that transect it. Deposition of the Upper A recently assembled series of studies on the New Madrid region (McKeown This map shows the major fault lines in the US! (epicentre 36.6 N 89.6 W), each measuring greater than magnitude 7.0. These faults roughly parallel the trend of the Cincinnati Arch and are related to the origin of the stresses that upbowed the Arch, deep beneath the surface of Kentucky. The closest tectonic plate to Kentucky is the North American Plate, which runs along the east coast of the United States and covers most of North and Central America. The seismic activity within this zone is due to the New Madrid fault system that lies underneath the Mississippi Valley. This 150 mile-long series of faults stretches under five states: Illinois, Missouri, Arkansas, Tennessee and Kentucky, and is responsible for four of the largest earthquakes in the history of the United States, which took place over three months from December 1811 and February 1812. Pennsylvanian system compiled by Coskren and Rice (1979) from data derived from drilling records and It. unexposed Cambrian and Ordovician strata. At the surface it is represented Caldwell County - Princeton. 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