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Topic: Deposition (geology)

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  Geology of Baxter State Park - Glacial Geology - Deposition - Maine Geological Survey
All types of glacial deposits are called glacial drift, a term handed down from the 18th and early 19th centuries, when glacial deposits were considered to be the result of icebergs drifting in the Biblical flood.
There are two types of drift deposits: unstratified drift, or material deposited directly by a glacier, and stratified drift, or sediments washed from glaciers into meltwater streams and deposited as sand and gravel.
Kettles or kettleholes are depressions formed in deposits of stratified drift, caused by the melting of a large block of ice which had been buried in the sand and gravel.
www.maine.gov /doc/nrimc/mgs/explore/bedrock/katahdin/glacial-deposition.htm   (1930 words)

  Deposition - Wikipedia, the free encyclopedia
In Christianity, the Deposition is the removal of Christ from the cross, at the Crucifixion.
In Archaeology, deposition is physically similar to that of geology.
In rapid prototyping, fused deposition modeling is a process by which a part is constructed by depositing material layer by layer.
en.wikipedia.org /wiki/Deposition   (224 words)

 Deposition (geology) - Wikipedia, the free encyclopedia
Deposition, also known as sedimentation, is the geological process whereby material is added to a landform.
This is the process by which wind, water, or ice create a sediment deposit through the laying down of granular material that has been eroded and transported from another geographical location.
Deposition can also refer to the build up of a sediment from organically derived matter or chemical processes.
en.wikipedia.org /wiki/Deposition_(geology)   (154 words)

 deposition - Search Results - MSN Encarta
Deposition (law), the testimony of a witness or of a party taken outside of court and reduced to writing.
Deposition is a word used in many fields to describe different processes: *In law, deposition is the taking of testimony outside of court.
In law, a deposition is evidence given under oath and recorded for use in court at a later date.
encarta.msn.com /encnet/refpages/search.aspx?q=deposition   (256 words)

 Deposition and Sedimentary Rock Formation
This deposit stretched from north of Banff to south of Canmore.
Since sedimentary rocks are the result of a sequential process of erosion and deposition, we can often find a mixture of many minerals trapped in their stony facade.
Deposits that have not been recycled numerous times may also contain significant amounts of minerals like feldspar, mica, and olivine.
www.mountainnature.com /Geology/Deposition.htm   (3478 words)

 MSN Encarta - Search Results - deposition
Deposition (law), the testimony of a witness or of a party taken outside of court and reduced to writing.
Deposit (geology), natural accumulation of mineral or rock material formed through deposition by waters, glaciers, or the wind (Glacier).
Deposit (geology), evidence of ice ages, formation of moraines, glacial till (boulder clay)
ca.encarta.msn.com /deposition.html   (123 words)

 NPS: Nature & Science» Geology Resources Division   (Site not responding. Last check: 2007-10-30)
The deposits closest to the land surface and the physiography, in general are the result of glacial advance and retreat during the last glacial period, the Wisconsin.
The outwash deposit is composed of stratified and sorted sand and gravel that represents an aggradational deposit of a large discharge of meltwater and sediment at and beyond the ice sheet margin at that time.
Because this upland deposit is composed of permeable sand and gravel, the outwash plain is a main ground-water recharge area and the deposits comprise a principal aquifer of the area.
www2.nature.nps.gov /geology/parks/slbe   (7642 words)

 Geology of the Sussex Sandstone - 3-D Reservoir Characterization
Deposition of the "B" sandstone began in the southeastern corner of the field with sand ridge 1; axis orientation is about north 20 degrees west.
Basin morphology during deposition of Sussex and Shannon shelf sandstone beds in the Powder River Basin is illustrated on figure 4 (shelfmod.gif) (Tillman and Martinsen, 1984).
Basin morphology during deposition of shelf sandstone beds in the Powder River Basin (Tillman and Martinsen, 1984 reprinted by permission).
pubs.usgs.gov /dds/dds-033/USGS_3D/ssx_txt/geology.htm   (2721 words)

 Honduras Geology   (Site not responding. Last check: 2007-10-30)
Unconsolidated silt, sand, and gravel deposited at the confluence of the Río Patuca and the Río Sutawala were mapped as Quaternary alluvium.
This indicates a depositional basin that is younger to the east.
Deposits of the Mosquitia plains are composed of lithic pebble and cobble clasts in a sandy matrix.
www.ig.utexas.edu /research/projects/honduras/wampu.htm   (7188 words)

 Geology Courses
This course is a continuation of Geology 101 and emphasizes concepts in physical geology at the introductory level.
The major emphasis is on geologic concepts and processes related to 1) glaciology and the nature of ice ages, 2) wind erosion and deposition, 3) oceanography, 4) earthquakes and seismology, 5) continental drift and plate tectonics, 6) economic geology, and 7) planetary geology.
This course is a continuation of Geology 102 and emphasizes concepts in historical geology at the introductory level.
www.uc.edu /geology/grad/courses.html   (2434 words)

 UCMP Glossary: Geology
A fan-shaped deposit of sand, mud, etc. formed by a stream where its velocity has slowed, such as at the mouth of a ravine or at the foot of a mountain.
A ridge of glacial sediment deposited by a stream flowing in and under a melting glacier.
A widespread, loose deposit consisting mainly of silt; most loess deposits formed during the Pleistocene as an accumulation of wind-blown dust carried from deserts, alluvial plains, or glacial deposits.
www.ucmp.berkeley.edu /glossary/gloss2geol.html   (3545 words)

 Geology of the Canadian Sites
Percolating water from the hill the deposit occurs within is strongly radioactive and was sold in the 1920s for therapeutic purposes.
The geology of the Silver Crater Mine site is similar to the geology of the Fission site, and the calcite vein-dike is part of the same group of calcite vein-dikes that dot the countryside near Bancroft.
This process occurs when vein-dike, which was hydrothermally deposited or injected as a molten liquid, is reheated enough to cause the evenly distributed biotite, hornblende, betafite, apatite, and so forth, in the wall-rock in the calcite vein-dike to start to migrate and form larger crystals in the calcite vein-dike.
www.csun.edu /~vcgeo005/gentry/canada.htm   (3274 words)

 An Introduction to Geology and Hard Rock Mining
Geology is the study of the earth, its surface configurations, and the physical and chemical processes acting upon its surface and its interior.
Deposits of coal, petroleum and naturally occurring brines do not fit such a rigorous definition, but have in generic terms also been considered minerals, principally because they are not readily identifiable as either animal or vegetable.
Mineral deposits are not uniform either in their physical character of the wallrock (hardness, toughness, stand-up time, required support), or in the nature of the ore and gangue minerals (intergrowths, variations in composition, intensity of oxidation and/or alteration processes acting on the ore minerals influencing their metallurgical behavior).
www.rmmlf.org /SciTech/Lacy/lacy.htm   (14533 words)

 Geology   (Site not responding. Last check: 2007-10-30)
Geology is the study of the earth, its structure, composition, and history.
Because such evidence of rapid deposition is so often found in the rocks of the earth, a revolution has been going on for a number of years in the estimates of the time it took to lay down strata.
Even if the deposition of a group of strata is claimed to have taken millions of years, if the strata are penetrated by a polystrate tree fossil it is clear that the time was really less than it takes for a tree to rot out and fall down.
www.creationism.org /heinze/HeinzeGeology.htm   (17411 words)

 Grand Hikes: The Grand Canyon Supergroup Formations
Deposition of the Unkar Group ended with a period of volcanic activity depositing repeated, thin basalt and andesite flows over the Dox Formation which interfinger with the upper Dox at their conformable horizon.
Deposited atop the Nankoweap are thick sedimentary sequences of the Galeros and Kwagunt Formations of the Chuar Group.
Deposition of the Unkar Group and the overlying Sixtymile Formation is believed to have ended more or less contemporaneously with the Grand Canyon Disturbance, which has been dated by various geologists at between approximately 825 to 725 million years of age.
www.rockhounds.com /grand_hikes/geology/supergroup_formations.shtml   (1020 words)

 Wisconsin: Geographical Provinces: Central Plain   (Site not responding. Last check: 2007-10-30)
The deposits of former glacial lakes cover parts of the Central Plain, in the driftless as well as the glaciated area.
The largest area of lake deposits is on the bed of Glacial Lake Wisconsin.
In the northern and northwestern part of the basin, the lake deposit is white quartz sand.
www.wisconline.com /wisconsin/geoprovinces/centralplain.html   (3222 words)

 WVGES Geology: Geology of the New River Gorge
The rocks were originally deposited horizontally as sediments in water bodies and swamps, but today they dip to the northwest at about 60 feet per mile due to subsequent tilting by mountain-building forces that affected all the Appalachians (Figure 5).
Toward the northwest was a shallow, inland sea that was the basin of deposition for the sediments in West Virginia.
Geology and geography of the New River Gorge at Hawks Nest, Fayette County.
www.wvgs.wvnet.edu /www/geology/geoles01.htm   (2302 words)

 [No title]   (Site not responding. Last check: 2007-10-30)
Sensitivities to acid deposition, ranked high, medium, and low are assigned on the basis of bedrock compositions and their associated soils, and their capacities to neutralize acid precipitation.
Fifty four percent of the approximately 37 million acres comprising the area of the SAA region is highly sensitive to acid deposition (having negligible or no capacity to neutralize), twenty percent as medium, and twenty six percent is rated as having low sensitivity.
Bedrock geology and surficial geologic deposits have been shown to exert an important influence on the chemical composition of stream water and on the sensitivity of aquatic ecosystems to acid deposition (Norton and others, 1982).
minerals.usgs.gov /acid/saa-acid-abstract.asc   (3061 words)

 [Regents Prep Earth Science] Weathering, Erosion, Deposition, & Landforms: Deposition
Deposition is the final step in the erosional-depositional system.
Final deposition of particles (sediments) usually occurs at the mouth of a stream.
The major factors that affect the rate of deposition are particle size, shape, density, and the velocity of the transporting stream.
regentsprep.org /Regents/earthsci/units/weathering/deposition.cfm   (407 words)

 Stratigraphy of India
Geology of India is as diverse as its geography and people.
Although there were phases of deformation in some parts during the Proterozoic, in some other places there had been quiet depositional activities during this time and these rocks still lie nearly flat covering large areas.
Sedimentary deposition was confined to coastal areas which were occasionally flooded by the trangressing sea.
geoindia.8m.com   (602 words)

 Geology of the Paleozoic Era   (Site not responding. Last check: 2007-10-30)
Deposition of platform sequences (shallow water sediments) on most of the craton due to several trangression and regressions of shallow (epeiric) seas.
Deposition of El Paso and Montoya group carbonates in shallow (ankle to chin deep) epeiric seas in a tropical setting for which there is no modern example.
East coast of Laurentia characterized by thickcontinental margin sediments deposited on craton platform (Sauk Sea carbonates and fl shales) and in a widening Iapetus Ocean.
www.epcc.edu /ftp/Homes/krimkus/paleogeonotes.htm   (1018 words)

 Gould Deposition   (Site not responding. Last check: 2007-10-30)
Deposition of STEPHEN JAY GOULD, held at the offices of Skadden, Arps, Slate, Meagher and Flom, Esqs., 919 Third Avenue, New York, New York, on the 27th day of November, 1981, at 9:30 o'clock a.m., pursuant to Notice, before Helaine J. Dribben, a Notary Public of the State of New York.
In geology, with a specialty in paleontology, 1967, Columbia University.
And five, "Explanation of the earth's geology and the evolutionary sequence by uniformitarianism," which is in its strict definition is held by no geologist, so therefore I find it — let me say for the record that I find it hard to answer that question because of the definitions here.
www.antievolution.org /projects/mclean/new_site/depos/pf_gould_dep.htm   (14671 words)

 GEOLOGY OF BELIZE and Ambergris Caye, Belize
The Quaternary (Pleistocene) rocks and modern sediments along the coast, and under water, are the youngest cycle of deposition in Belize, and are represented largely by shallow-water, limy sediments.
Along its entire length the modern barrier reef sits atop a prominent fault that separates the shallow platform to the west from the deeper Caribbean to the east, where water depths progressively approach 4000 meters.
The area was faulted about 1.8 million years ago as sea level fell, exposing the older shelf, and the consequence of that was the creation of a high ridge along the shelf edge that became the site of coral growth.
ambergriscaye.com /geology   (921 words)

Although of great age (deposited between 2,800 and 2,000 million years ago), the rocks are remarkably well preserved, and are of great economic importance.
Huge thicknesses of glacial deposits - tillites, varved clays, and sandstones - were laid down; the Dykwa glacial sequence of the Karroo basin is 800-900 m/2,600-2,950 ft thick, suggesting a lengthy glaciation.
The Permian glacial deposits were closely followed by the deposition of coal measures (of economic importance in the Wankie basin of Zimbabwe), followed in turn by shales, sandstones, and finally the Karroo basalts.
www.fortunecity.com /oasis/skegness/394/geology.htm   (1416 words)

 Geology of Sunset Crater National Monument
Scoria deposited on flow units coincident with Bonito flow.
Deposition of red scoria on Sunset Crater cinder cone summit, cementation of crater rim scoria by vapor-phase minerals.
Eruption of fl lapilli and bombs result in minor collapse of the east rim of the crater and formation of the small crater on the east side of the summit.
wrgis.wr.usgs.gov /docs/usgsnps/sunset/sunvolc.html   (345 words)

 Reading A Stream
Perhaps the trickiest theories yet to confront the beginning gold-dredger are those that relate to placer geology, also known as "the science of stream deposition." Placer geology concerns the varying conditions which cause gold and other heavy materials to be deposited in a streamflow environment.
Without a doubt, the best way to learn the ins and outs of gold deposition is to place yourself at the feet of a genuine "old-timer", but unfortunately not too many of us have access to such a person; we will therefore have to study the facts relating to placer geology from books.
There are so many variables involved in the science of placer geology it would be virtually impossible to mention all of them, but basically, the deposition of heavy materials in a stream is based upon the speed and volume of water flow coupled with the shape and slope of the river channel.
www.angelfire.com /ga4/orlandogpaa/StreamGold.html   (4184 words)

 Historical Geology   (Site not responding. Last check: 2007-10-30)
The deposition of these alternating sediment layers continued as several thousand feet of strata were deposited.
During the latter part of the Triassic period the area was down-warped, and the seawaters came in and deposited the sediments of the Haro formation.
The loose and unconsolidated sediments deposited during the different glacial invasions and interglacial intervals were left in such a position that in some cases they were exposed to the action of the waves.
nwic-research.org /npsec/html/ecodesc/geomorph/geology/histgeo.htm   (1406 words)

 WVGES Geology: Historical Geology Summary
Both clastics and carbonates were deposited in a mixed marine and nonmarine environment, with clastics predominating in the eastern part of the State.
Swamp conditions prevailed, resulting in the deposition of thousands of feet of nonmarine sandstone and shale and the many important coal seams that we know today.
Important lake deposits, predominantly clay, were thus laid down in the Monongahela River basin.
www.wvgs.wvnet.edu /www/geology/geolhist.htm   (849 words)

 [No title]   (Site not responding. Last check: 2007-10-30)
[Adapted from Glossary of Geology, 4th ed.] UF+: satellite altimetry BT: geolocation measurement RT: geography amphibians DF: Vertebrates of the class Amphibia; cold-blooded tetrapods that breathe by means of gills in the early stages of life and by means of lungs in the later stages.
[Glossary of Geology, 4th ed.] In practice, the study of the oceans is considered to be ocean sciences (oceanography) and the study of the atmosphere is considered to be meteorology.
[Glossary of Geology, 4th ed.] BT: geologic and hydrologic processes RT: engineering geology hazards liquid chromatography DF: Process for separating components in a liquid phase from one another by passing them over a solid or liquid stationary phase where the components are separated by their differential mobility rates.
www.alexandria.ucsb.edu /~lhill/usgs_terms/usgs/usgs9d/ALPHA9D.TXT   (6596 words)

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