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Topic: Mississippi embayment

	Mississippi - LoveToKnow 1911
		Mississippi is bounded N. by Tennessee, E. by Alabama, S. by the Gulf of Mexico and Louisiana, W. by Louisiana, from which it is separated by the Pearl River and by the Mississippi, and by Arkansas, from which also it is separated by the Mississippi.
		Mississippi has taken a leading part in the movement to bring about the removal of the common law disabilities of married women, the first statute for that purpose having been passed in 1839.
		The history of Mississippi may be divided into the period of exploration (154 1699), the period of French rule (1699-1763), the period of English rule (1763-1781), the period of Spanish rule (1781-1798), the territorial period (1798-1817), and the period of statehood (1817 seq.).
	www.1911encyclopedia.org /M/MI/MISSISSIPPI.htm (6789 words)

	Mississippi embayment - Wikipedia, the free encyclopedia
		It is essentially a northward continuation of the fluvial sediments of the Mississippi River Delta to its confluence with the Ohio River at Cairo, Illinois.
		The embayment is a topographically low-lying basin that is filled with Cretaceous to recent sediments.
		The northern end of the embayment appears as an anomalous break in regional geologic structure with Paleozoic sedimentary rocks both to the east in Kentucky and Tennessee and to the west in Missouri and Arkansas.
	en.wikipedia.org /wiki/Mississippi_embayment (275 words)

	Mississippi Embayment
		The Mississippi Embayment stretches longitudinally from southern Louisiana to Illinois.
		The modern embayment is attributed to the rise of sea level in the Cretaceous.
		The Mississippi River basin was a massive meltwater drainage channel during the Pleistocene.
	www.emporia.edu /earthsci/student/salley3 (1187 words)

	Mississippi River
		The 314-kilometer segment of the Upper Mississippi River extending from the mouth of the Missouri River (near St. Louis, Missouri) to the mouth of the Ohio is often termed the Middle Mississippi River.
		The Lower Mississippi River channel is wide and generally shallow in the northern part of its alluvial valley, where coarse bed materials delivered by tributaries allow the river to meander.
		The commercial harvest in the Upper Mississippi River is dominated by four groups of fishes: common carp, buffalos (bigmouth buffalo and smallmouth buffalo), catfishes (channel catfish and flathead catfish), and freshwater drum (Fremling et al.
	biology.usgs.gov /s+t/SNT/noframe/ms137.htm (14566 words)

	USGS - NAWQA - Water Quality in the Mississippi Embayment - Introduction
		The Mississippi Alluvial Plain is in the northern part of the Mississippi Embayment, a geologic structural trough in which the underlying crust of the Earth forms a deep valley.
		The natural regional flow of ground water in the Mississippi Embayment in the Tertiary aquifers is from the outcrop areas in the upper Gulf Coastal Plain, laterally along the aquifers toward the embayment axis, and then upward through overlying confining units and aquifers to the surface of the Mississippi Alluvial Plain (Grubb, 1986; Ackerman, 1989).
		The Mississippi River confining unit is composed of the upper silt and clay of the Quaternary alluvium, whereas the Mississippi River alluvial aquifer is composed of the lower sand and gravel of the Quaternary alluvium (Boswell and others, 1968; Ackerman, 1989).
	pubs.usgs.gov /circ/circ1208/introduction.htm (1944 words)

	HA 730-F Mississippi embayment aquifer system text
		The Mississippi embayment aquifer system is the most extensive aquifer system in Segment 5, and parts of the system are discussed in Chapters C,D,G, and K (fig.
		The Mississippi embayment aquifer system merges eastward in Mississippi and in Alabama with the Pearl River aquifer that is part of the Southeastern Coastal Plain aquifer system (see Chapter G of this Atlas) and merges westward with the Coastal uplands aquifer system in Texas and Oklahoma (see Chapter E of this Atlas).
		Most of the precipitation that falls on the exposed part of the Mississippi embayment aquifer system is lost to streams and rivers as direct runoff, is returned to the atmosphere from plants and soil by processes of evapotranspiration, or discharges as baseflow to streams in the outcrop area.
	capp.water.usgs.gov /gwa/ch_f/F-text4.html (3358 words)

	Seismic Susceptibility of U.S. Highway 60 in Southeast MO
		The northern region of the Embayment is bordered by the Ozark Plateau on the northwest and by the Interior Low Plateaus on the north and northeast sides (4).
		The most prominent upland feature of this portion of the Mississippi Embayment is Crowley's Ridge, which extends as a broad arc from northeastern Arkansas to southeastern corner of Missouri (4).
		The alluvial valley was formed by shallow braided streams of the Ohio River during the Pleistocene glaciation and by the Mississippi River during the late glacial and postglacial periods (5).
	web.umr.edu /~rluna/us60eq/Geology_page.htm (966 words)

	Modeling Geologic Structure of Sedimentary Basins from Ambient Ground Vibration (Site not responding. Last check: 2007-10-13)
		The embayment is a natural laboratory for the investigation of localized resonance and its potential effects on buildings and other sensitive structures.
		Figure 2 E-W geologic cross-section of the Mississippi Embayment at the latitude of Memphis, TN (from Bodin and Horton, 1999).
		Seht and Wohlenberg (1999) and Bodin and Horton (1999) observe a correlation between the dominate peak in the H/V ratio and sediment thickness overlying Paleozoic rock in the Rhine Embayment (Germany) and the Mississippi Embayment, respectively.
	www.ceri.memphis.edu /people/horton/NOISE/noise.html (3103 words)

	New Madrid area once had a seashore; Rivers rerouted
		The darker blue (map) of the old Mississippi River bed curves sharply west at the regional airport between present Scott City and Cape Girardeau.
		The Mississippi in older days migrated rapidly by eroding on the outside of a river bend and depositing point bars on the inside of the river bend.
		Researcher Margaret Guccione with the University of Arkansas finds the Mississippi's path changed significantly at the time of the AD 1450-1470 New Madrid earthquake.
	www.showme.net /~fkeller/quake/topography.htm (1134 words)

	Ohio River changes, Southern Illinois geology topsoil glaciers
		Pulaski County, Illinois is near the junction of the Mississippi and Ohio Rivers.
		The Mississippi Embayment came into this area, perhaps as high as Ullin and Wetaug (top right of map).
		The Mississippi River did not have the "Thebes gap" between Thebes and Commerce until 10-15,000 years ago, when significant quakes shook the Commerce Lineament.
	www.showme.net /~fkeller/quake/lib/pulaskiquadrangle.htm (1034 words)

	Reference Shear Wave Velocity Profiles
		Regional and local reference profiles were developed for the Upper Mississippi Embayment based on measured shear wave velocity profiles that were compiled for the Central United States.
		A reference embayment profile was developed to represent the shear wave velocity of geologic deposits below a depth of 70 meters.
		The reference embayment profile was combined with the near-surface reference profiles (characteristic and generic profiles).
	www.ce.gatech.edu /~sromero/maecenter/profiles1.html (675 words)

	The Jackson Purchase or Mississippi Embayment Region, Kentucky Geological Survey site (Site not responding. Last check: 2007-10-13)
		The Jackson Purchase, or Mississippi Embayment Region, shown in yellow on the map, is located in western Kentucky where Cretaceous and Tertiary sediments occur at the surface (see the geologic map).
		The Mississippi River Valley is situated along the axis of the embayment.
		The upper Mississippi Embayment is underlain by faults of the New Madrid Fault Zone, the most active earthquake zone in the central United States.
	www.uky.edu /KGS/geoky/regionjackson.htm (210 words)

	A History of New Orleans
		The Mississippi is unusual for North American rivers in that it has a large delta and is not embayed, i.e., the sea does not enter and flood the river's mouth.
		However, the Mississippi's flow of water and volume of sediment is such that the river extends its delta into the Gulf and fills its embayment, even as it sinks.
		The Mississippi's methods of building its delta have determined differences in elevations in the city and differences in sub-surface materials, thereby determining the city's historical and current patterns of growth and development.
	www.madere.com /history.html (11526 words)

	Geohistory
		Repeated intervals of erosion and deposition of glacial outwash by the ancestral Mississippi and Ohio Rivers form the Eastern and Western Lowlands and Crowley’s Ridge.
		Marine and fluvial clastic sediments fill the Mississippi Embayment; transportation of some bauxite; swampy conditions favorable to the accumulation of plant debris (lignite).
		Shallow marine sea in the Mississippi Embayment; formation of nearshore reefs and layers rich in marine remains and accumulation of dark marine clays; development of bauxite on islands of exposed Cretaceous igneous rocks.
	www.state.ar.us /agc/geohisto.htm (704 words)

	Mississippi River Delta - Wikipedia, the free encyclopedia
		The Mississippi River Delta is the modern area of land (the river delta) built up by alluvium deposited by the Mississippi River as it slows down and enters the Gulf of Mexico.
		Each Mississippi River deltaic cycle was initiated by a gradual capture of the Mississippi River by a distributary which offered a shorter and steeper route to the Gulf of Mexico.
		Because there is a considerable amount of economic development along the current path of the Mississippi, and because extensive flooding and evacuation would occur in the new area, Congress instructed the Army Corps of Engineers to maintain the then-present 70% / 30% distribution of water between the Lower Mississippi and the Atchafalaya River channels respectively.
	en.wikipedia.org /wiki/Mississippi_River_Delta (881 words)

	SEMP - Shocking Geology of the New Madrid Seismic Zone Revealed
		The Mississippi Embayment is a physiographic low-lying, sediment-filled basin.
		The Mississippi Embayment formed from the filling in of a shallow saltwater basin that existed as a bay jutting northward from the Gulf of Mexico into the North American continent as far as Illinois during the Cretaceous period (165 million years ago to 65.5 million years ago).
		The Mississippi Embayment sedimentary rocks are rich with now extinct clams, snails, sharks, and marine reptiles such as mosasurs and plesiosaurs that thrived during the Cretaceous.
	www.semp.us /biots/biot_328.html (2200 words)

	New Madrid Seismic Zone \| Tectonic Setting
		An uplifted and possibly anomalously dense lower crust is suggested as the cause of the linear positive gravity anomaly associated with the upper Mississippi Embayment.
		The center of the seismic zone is in the middle of the Mississippi Embayment, a southwest trending trough of fluvial and alluvial sediments.
		The Mississippi Embayment was created by the rifting of Rodina, which left a large trough.
	www.geo.arizona.edu /geo5xx/geos577/projects/muhlenkamp/tectonics.htm (265 words)

	Arkansas Geography - NETSTATE
		Missouri, Tennessee, and Mississippi border Arkansas on the east.
		Mississippi Alluvial Plain: The Mississippi River forms most of the eastern border of Arkansas between Tennessee and Louisiana.
		The Mississippi Alluvial Plain is sometimes referred to as the Delta region and is covered with rich soil carried by the Mississippi River and its tributaries.
	www.netstate.com /states/geography/ar_geography.htm (897 words)

	proposal (Site not responding. Last check: 2007-10-13)
		The unconsolidated sediments of the Mississippi embayment have long been conjectured as being important in evaluating the hazards from ground shaking induced by major earthquakes in the New Madrid Seismic Zone (NMSZ).
		The Mississippi embayment (Figure 1) is a trough plunging gently to the southwest having developed since Mesozoic time (i.e.
		The shot (0022) was 24 km from the CERI campus near the Mississippi River (Figure 1).
	www.ceri.memphis.edu /people/langston/ESEE/proposal.html (6758 words)

	CONTRASTS IN BASEMENT FAULTS OF THE MISSISSIPPI VALLEY BASEMENT GRABEN AND THE NEW MADRID SEISMIC ZONE
		The Cambrian-age Mississippi Valley basement graben trends northeast beneath the Mississippi Embayment of the Gulf Coastal Plain.
		Cretaceous strata in the broadly synclinal Mississippi Embayment overlie the boundary faults of the Mississippi Valley graben.
		The northeast-trending alignment parallels the boundary faults of the Mississippi Valley graben.
	gsa.confex.com /gsa/2002NC/finalprogram/abstract_32488.htm (459 words)

	USGS Earthquake Hazards Program » Historic Earthquakes
		On the basis of the large area of damage (600,000 square kilometers), the widespread area of perceptibility (5,000,000 square kilometers), and the complex physiographic changes that occurred, the Mississippi River valley earthquakes of 1811-1812 rank as some of the largest in the United States since its settlement by Europeans.
		Coal and sand were ejected from fissures in the swamp land adjacent to the St. Francis River, and the water level is reported to have risen there by 8 to 9 meters.
		Local uplifts of the ground and water waves moving upstream gave the illusion that the river was flowing upstream.
	earthquake.usgs.gov /regional/states/events/1811-1812.php (1254 words)

	Kentucky Physiographic Regions - Mississippi Embayment (Jackson Purchase)
		The far western end of the state is located in the Gulf Coastal Plain of the central United States and consists of alluvial deposits and loess.
		It is bounded by the Mississippi River, Ohio River, and Tennessee River (now Kentucky Lake) and includes the lowest elevations in the state.
		The area was added to the state in 1818 when it was purchased from the Chickasaw Indians by Andrew Jackson and is known as the Jackson Purchase.
	www.uky.edu /KentuckyAtlas/phys-mississippi-embayment.html (84 words)

	SCSB#395: Geology
		The Mississippi River flows southward down the axial region of this protrusion to the Mississippi Delta and the Gulf of Mexico.
		The modern Mississippi and ancestral versions of the Mississippi followed this zone throughout the Paleozoic, and the Mississippi Embayment is at present a prominent extension of the Gulf Coastal Plain into the continental interior.
		As with the Mississippi Embayment, divergence ceased early in the Paleozoic leaving a zone of weakness and subsidence.
	soilphysics.okstate.edu /S257/book/geology (3236 words)

	rl& rl&0
		We investigate the crustal structure in the Mississippi embayment and adjacent areas using teleseismic receiver functions.
		Complicating the assessments of the site affects in the Mississippi embayment is the lack of detailed shear wave velocity profiles of the sediments down to the bedrock.
		The presence of high velocity basal crust with a ~4.3 km/sec shear velocity underlain beneath the embayment indicates that the lower crust has been altered by the injection of mantle material, consistent with the hypothesis of Mooney et al.
	www.eas.slu.edu /People/AAkinci/receiver.html (3233 words)

	Carbon-Dioxide Sequestration
		The Black Warrior Basin of northwestern Alabama and northeastern Mississippi is a foreland basin, containing Paleozoic sedimentary rocks.
		The Black Warrior Basin is bounded by the Cincinnati Arch, Appalachian Basin, Louisiana-Mississippi Salt Basins, and the Mississippi Embayment part of the Illinois Basin.
		Most of the basin, including its thrust-faulted margins, is buried beneath a veneer of Cretaceous and Tertiary strata of the Mississippi Embayment and Gulf Coastal Plain.
	www.beg.utexas.edu /environqlty/co2seq/0pottsville.htm (628 words)

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