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1811–1812 New Madrid Earthquakes
The 1811–1812 New Madrid earthquakes were a series of intense intraplate earthquakes beginning with an initial earthquake of moment magnitude 7.2–8.2 on December 16, 1811, followed by a moment magnitude 7.4 aftershock on the same day. Two additional earthquakes of similar magnitude followed in January and February 1812. They remain the most powerful earthquakes to hit the contiguous United States east of the Rocky Mountains in recorded history.Historic Earthquakes New Madrid Earthquakes 1811–1812 United States Geological Survey The earthquakes, as well as the of their occurrence, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Artist's Impression
An artist's impression, artist's conception, artist's interpretation, or artist's rendition is the representation of an object or a scene created by an artist when no other accurate representation is available. It could be an image, a sound, a video or a model. Artist's impressions are often created to represent concepts and objects that cannot be seen by the naked eye; that are very big, very small, in the past, in the future, fictional, or otherwise abstract. For example, in architecture, artists' impressions are used to showcase the design of planned buildings and associated landscape. Artists' impressions are particularly prominent in space art. Artist's depictions of prehistoric life are known as paleoart. See also *Architectural rendering *Concept art Concept art is a form of visual art used to convey an idea for use in film, video games, animation, comic books, television shows, or other media before it is put into the final product. The term was used by the Walt ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Memphis, Tennessee
Memphis is a city in Shelby County, Tennessee, United States, and its county seat. Situated along the Mississippi River, it had a population of 633,104 at the 2020 United States census, 2020 census, making it the List of municipalities in Tennessee, second-most populous city in Tennessee, the fifth-most populous in the Southeastern United States, Southeast, and the List of United States cities by population, 28th-most populous in the nation. Memphis is the largest city proper on the Mississippi River and anchors the Memphis metropolitan area that includes parts of Arkansas and Mississippi, the Metropolitan statistical area, 45th-most populous metropolitan area in the U.S. with 1.34 million residents. European exploration of the area began with Spanish conquistador Hernando de Soto in 1541. Located on the high Chickasaw Bluffs, the site offered natural protection from Mississippi River flooding and became a contested location in the colonial era. Modern Memphis was founded in 181 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Reelfoot Lake
Reelfoot Lake is a shallow natural lake located in the northwest portion of the U.S. state of Tennessee, in Lake and Obion Counties. Much of it is swamp-like, with bayou-like ditches (some natural, some man-made) connecting more open bodies of water called basins, the largest of which is called Blue Basin. Reelfoot Lake is noted for its bald cypress trees and its nesting pairs of bald eagles. Public use of the lake and grounds has been preserved since it was acquired by the state of Tennessee in the early 20th century and the area was established as Reelfoot Lake State Park. Lake Isom, a similar, smaller lake to the immediate south, has been designated as a National Wildlife Refuge area. In 1966, Reelfoot Lake was designated as a national natural landmark by the National Park Service. History Reelfoot Lake was formed when the region subsided during the 1811–12 New Madrid earthquakes, which were centered around New Madrid, Missouri. The earthquakes resulted in several major ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Kentucky Bend
The Kentucky Bend, variously called the New Madrid Bend, Madrid Bend, Bessie Bend, or Bubbleland, is an exclave of Fulton County, Kentucky that is encircled by the states of Tennessee and Missouri. The exclave is a portion of a peninsula defined by an oxbow loop meander of the Mississippi River, and its inclusion in the state of Kentucky stems from uncertainties of the course of the Mississippi River when the boundary between Tennessee and Kentucky was established. As of the 2020 census, the population of the Kentucky Bend Census County Division was nine people. The mailing address of the area is Tiptonville, Tennessee. New Madrid, Missouri is directly across the river to the north, but it lacks connection to the bend by road or ferry. The closest crossings of the Mississippi River are the Dorena–Hickman Ferry and the Caruthersville Bridge located in nearby Dyer County. Geography Kentucky Bend is the extreme southwestern corner of Kentucky. The peninsula is traversed ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Waterfall
A waterfall is any point in a river or stream where water flows over a vertical drop or a series of steep drops. Waterfalls also occur where meltwater drops over the edge of a tabular iceberg or ice shelf. Waterfalls can be formed in several ways, but the most common method of formation is that a river courses over a top layer of resistant bedrock before falling onto softer rock, which erodes faster, leading to an increasingly high fall. Waterfalls have been studied for their impact on species living in and around them. Humans have had a distinct relationship with waterfalls since prehistory, travelling to see them, exploring and naming them. They can present formidable barriers to navigation along rivers. Waterfalls are religious sites in many cultures. Since the 18th century, they have received increased attention as tourist destinations, sources of hydropower, andparticularly since the mid-20th centuryas subjects of research. Definition and terminology A waterfal ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Reverse Fault
In geology, a fault is a planar fracture or discontinuity in a volume of rock across which there has been significant displacement as a result of rock-mass movements. Large faults within Earth's crust result from the action of plate tectonic forces, with the largest forming the boundaries between the plates, such as the megathrust faults of subduction zones or transform faults. Energy release associated with rapid movement on active faults is the cause of most earthquakes. Faults may also displace slowly, by aseismic creep. A ''fault plane'' is the plane that represents the fracture surface of a fault. A ''fault trace'' or ''fault line'' is a place where the fault can be seen or mapped on the surface. A fault trace is also the line commonly plotted on geological maps to represent a fault. A ''fault zone'' is a cluster of parallel faults. However, the term is also used for the zone of crushed rock along a single fault. Prolonged motion along closely spaced faults can blur the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Landslide
Landslides, also known as landslips, rockslips or rockslides, are several forms of mass wasting that may include a wide range of ground movements, such as rockfalls, mudflows, shallow or deep-seated slope failures and debris flows. Landslides occur in a variety of environments, characterized by either steep or gentle slope gradients, from mountain ranges to coastal cliffs or even underwater, in which case they are called submarine landslides. Gravity is the primary driving force for a landslide to occur, but there are other factors affecting slope stability that produce specific conditions that make a slope prone to failure. In many cases, the landslide is triggered by a specific event (such as heavy rainfall, an earthquake, a slope cut to build a road, and many others), although this is not always identifiable. Landslides are frequently made worse by human development (such as urban sprawl) and resource exploitation (such as mining and deforestation). Land degradation freque ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Meizoseismal Area
The meizoseismal area in an earthquake is the area of maximum damage. For example, in the Charleston, South Carolina, earthquake of 1886, the meizoseismal area was an area about twenty by thirty miles stretching northeast between Charleston and Jedburg and incorporating Summerville. The estimated epicenter was near Middleton Place. References Seismology {{seismology-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Missouri Bootheel
The Missouri Bootheel is a Salient (geography), salient (protrusion) located in the southeasternmost part of the U.S. state of Missouri, extending south of 36°30′ north latitude, so called because its shape in relation to the rest of the state resembles the heel of a boot. Strictly speaking, it is composed of some or all of the counties of Dunklin County, Missouri, Dunklin, New Madrid County, Missouri, New Madrid, and Pemiscot County, Missouri, Pemiscot. However, the term is locally used to refer to the entire southeastern lowlands of Missouri located within the Mississippi Embayment, which includes parts of Butler County, Missouri, Butler, Mississippi County, Missouri, Mississippi, Ripley County, Missouri, Ripley, Scott County, Missouri, Scott, Stoddard County, Missouri, Stoddard and extreme southern portions of Cape Girardeau County, Missouri, Cape Girardeau and Bollinger County, Missouri, Bollinger counties. The largest city in the region is Kennett, Missouri, Kennett. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Soil Liquefaction
Soil liquefaction occurs when a cohesionless saturated or partially saturated soil substantially loses Shear strength (soil), strength and stiffness in response to an applied Shear stress, stress such as shaking during an earthquake or other sudden change in stress condition, in which material that is ordinarily a solid behaves like a liquid. In soil mechanics, the term "liquefied" was first used by Allen Hazen in reference to the 1918 failure of the Calaveras Dam in California. He described the mechanism of flow liquefaction of the embankment dam as: The phenomenon is most often observed in saturated, loose (low density or uncompacted), sandy soils. This is because a loose sand has a tendency to Compressibility, compress when a force, load is applied. Dense sands, by contrast, tend to expand in volume or 'Reynolds' dilatancy, dilate'. If the soil is saturated by water, a condition that often exists when the soil is below the water table or sea level, then water fills the gap ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Caruthersville, Missouri
Caruthersville is a city in and the county seat of Pemiscot County, Missouri, United States, located along the Mississippi River in the Bootheel region of the state's far southeast. The population was 5,562, according to the 2020 census. History Caruthersville lies in Missouri's Bootheel on the Mississippi River. The word "Pemiscot" comes from the word meaning "liquid mud" in the Fox language. Mississippi waters have frequently flooded the flatlands, creating fertile alluvial land valued for farming. Settling the floodplain has resulted in periodic problems for residents, as there are regular floods despite (and because of) elaborate constructed systems of levees and flood controls. Native Americans inhabited the land of the Caruthersville area for thousands of years before European settlement. The Mississippian culture built huge earthwork mounds throughout the Mississippi Valley. One such earthwork remains in this county, rising 270 feet above sea level about four miles s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
