plates of the lithosphere on Earth File Earth internal structure.png thumb 350px Earth cutaway from Core geology core to Crust geology crust , the lithosphere comprising the crust and lithospheric mantle detail not to scale The lithosphere Greek language Greek lithos for rocky sphaira ... mantle that behaves elastically on time scales of thousands of years or greater. Earth s lithosphere In the Earth the lithosphere includes the crust and the uppermost mantle, which constitute the hard and rigid outer layer of the Earth. The lithosphere is underlain by the asthenosphere , the weaker, hotter, and deeper part of the upper mantle. The boundary between the lithosphere and the underlying asthenosphere is defined by a difference in response to stress the lithosphere remains rigid for very ... the asthenosphere deforms viscously and accommodates strain through plastic deformation. The lithosphere is broken into plate tectonics tectonic plates . The uppermost part of the lithosphere that chemically ... soil forming process is called the pedosphere . The concept of the lithosphere as Earth s strong ... which he called the lithosphere above a weaker layer which could flow which he called the asthenosphere ... these ideas about lithosphere and asthenosphere were developed long before plate tectonic theory was articulated in the 1960s, the concepts that a strong lithosphere exists and that this rests on a weak asthenosphere are essential to that theory. There are two types of lithosphere Oceanic lithosphere, which is associated with Oceanic crust and exists in the ocean basins Continental lithosphere, which is associated with Continental crust The thickness of the lithosphere is considered to be the depth ... this isotherm because olivine is generally the weakest mineral in the upper mantle. Oceanic lithosphere ... the crust , while continental lithosphere has a range in thickness from about 40 km to perhaps 200 km the upper 30 to 50 km of typical continental lithosphere is crust. The mantle part ... more details
Mergeto Lithosphere Oceanic lithosphere date July 2009 Oceanic lithosphere Oceanic lithosphere is typically about 50 100 km thick but beneath the mid ocean ridges is no thicker than the crust , while the continental lithosphere has a range in thickness from about 40 km to perhaps 200 km the upper 30 to 50 km of the typical continental lithosphere is crust. The mantle part of the lithosphere consists largely of peridotite. The crust is distinguished from the upper mantle by the change in chemical composition that takes place at the Moho discontinuity. Oceanic consists mainly of mafic crust and ultramafic mantle peridotite and is denser than the continental lithosphere, for which the mantle is associated with crust made of felsic rocks. Oceanic lithosphere thickens as it ages and moves away from the mid ocean ridge. This thickening occurs by conductive cooling, which converts hot asthenosphere into lithospheric mantle, and causes the oceanic lithosphere to become increasingly thick and dense with age. Oceanic lithosphere is less dense than asthenosphere for a few tens of millions of years, but after this becomes increasingly denser than the asthenosphere. The gravitational instability of mature oceanic lithosphere has the effect that, at subduction zones, the oceanic lithosphere invariably sinks underneath the overriding lithosphere, which can be oceanic or continental. New oceanic lithosphere is constantly being produced at mid ocean ridges and is recycled back to the mantle at subduction zones. As a result, oceanic lithosphere is much younger than continental lithosphere the oldest oceanic lithosphere is about 170 million years old, while parts of the continental lithosphere are billions of years old. Category Physical geography Category Structure of the Earth Category Systems ecology Geophysics stub ... more details
about the album by Robert Rich and Ian Boddy the geological term Lithosphere Infobox Album See Wikipedia WikiProject Albums Name Lithosphere Type studio Longtype Artist Robert Rich musician Robert Rich and Ian Boddy Cover Lithosphere.jpg Released 2005 in music 2005 Recorded April 2005 at Soundscape Studio in Mountain View, California Genre Ambient music Ambient Length 52 46 Label DiN record lable DiN Producer Robert Rich musician Robert Rich and Ian Boddy Reviews Allmusic Rating 4.5 5 Allmusic class album id r862197 pure url yes link Piero Scaruffi 5 10 http www.scaruffi.com avant roach.html link Chronology Robert Rich musician Robert Rich Last album Echo of Small Things br 2005 This album Lithosphere br 2005 Next album Electric Ladder br 2006 Misc Extra chronology Artist Ian Boddy Type studio Last album Arcturus album Arcturus br 2005 This album Lithosphere br 2005 Next album Elemental Ian Boddy album Elemental br 2006 Lithosphere 2005 is a collaborative album by Electronic music electronic musicians Robert Rich musician Robert Rich and Ian Boddy . Like their previous collaboration Outpost Robert Rich and Ian Boddy album Outpost , this album was released as a limited edition of 2000 copies. Track listing Threshold 2 07 Vent 5 20 Chamber 6 29 Glass 3 40 Subduction 5 34 Geode 6 32 Stone 3 51 Metamorphic 7 25 Lithosphere 6 29 Melt 5 15 Personnel Robert Rich MOTM modular synthesizer , TimewARP2600, Sampler musical instrument samples and scrapes, lap steel guitar Ian Boddy NI Reaktor, Logic Pro Ultrabeat, EXS24, EVB3, VSL Glass, Stones, strings and woodwind samples, rocks External links http www.robertrich.com rrlithosphere.html album feature from Robert Rich s official web site Category Robert Rich albums Category 2005 albums ... more details
In geology and geophysics , thermal subsidence is a mechanism of subsidence in which conduction heat conductive cooling of the mantle geology mantle thickens the lithosphere and causes it to decrease in elevation. This is because of thermal contraction as mantle material cools and becomes part of the mechanically rigid lithosphere, it becomes more dense than the surrounding material. Additional material added to the lithosphere thickens it and further causes a buoyancy buoyant decrease in the elevation of the lithosphere. This creates accommodation space into which sediments can deposit, forming a sedimentary basin . Category Geodynamics Geology stub ... more details
may refer to Isostasy in geology gravitational equilibrium between the earth s lithosphere and asthenosphere Statically indeterminate Statically determinate statically determinate structure in physics and engineering disambig ... more details
Techtonic can refer to Tecktonik , a frenetic and quirky form of street dance which is typically performed to electro house music. It may also be a misspelling of Tectonic , in reference to Tectonics , a field of study within geology concerned generally with the structures within the lithosphere of the Earth or other planet s. Plate tectonics , a scientific theory which describes the large scale motions of Earth s lithosphere . disambig ... more details
one source date March 2012 The lithospheric flexure also called regional isostasy is the process by which the lithosphere rigid outer layer of the Earth bends under the action of forces as the weight of a growing orogen or the changes in ice thickness related to de glaciations. The lithosphere is a thin, outer, rigid layer of the Earth resting on the asthenosphere , a viscous layer that in geological time scales behaves a viscous fluid. Thus, when loaded, the lithosphere progressively reaches an isostasy isostatic equilibrium , which is the name of the Archimedes principle applied to these geological settings. ref Isostasy and Flexure of the Lithosphere, A. B. Watts, University of Oxford. DOI 10.2277 0521006007 ref This phenomenon was first described in the late 19th century, to explain the shorelines uplifted in Scandinavia due to the removal of large ice massed during the last glaciation. G. K. Gilbert used it to explain the uplifted terraces of Lake Bonneville . ref http books.google.com books?id NY0sAAAAYAAJ&ots LDm6fj fmv&dq lake 20bonneville 20grove 20karl 20gilbert&pg RA1 PR5 Lake Bonneville US Geological Survey Monograph No. 1 . 1890. 438 p. ref The geometry of the lithospheric bending is often modeled adopting a pure elastic thin plate approach sometimes by fitting the gravity anomaly produced by that bending rather than more direct data of it . The thickness of such plate that best fits the observed lithospheric bending is called the equivalent lithosphere rigidity elastic thickness of the lithosphere , and is related to the stiffness or rigidity of the lithosphere. These lithospheric bending calculations are typically performed following the Euler Bernoulli bending formulation, or alternatively the Lagrange equation Love Kirchhoff . References references Category Geodynamics es Flexi n litosf rica ... more details
is created. Due to the instability in a local area, the base of the lithosphere breaks up into descending blobs fed by an enlarging region of thinning lithosphere. The space left by departing lithosphere is filled by an asthenosphere upwelling. ref name Dor cite book title Exhumation of the North ... Society of America ref Delamination of the lithosphere has two major geologic effects. First, because a large portion of dense material is removed, the remaining portion of the crust and lithosphere ... encounters the base of the thin lithosphere and often results in melting and a new phase of volcanism ... of lithosphere delamination is the Sierra Nevada U.S. Sierra Nevada mountains in the western USA ... more details
In geology , a forebulge is a flexural bulge in front of a load on the lithosphere . This load causes the lithosphere to flex by depressing the plate beneath it. Because of the flexural rigidity of the lithosphere, the area around the load is uplifted by a height that is 4 of that of the depression under the load. This load and resulting flexure place stress on the mantle geology mantle , causing it to flow into the area around the loaded area. The subsidence of the area under the load and the uplift of the forebulge continue until the load is in isostasy isostatic equilibrium, a process which takes on the order of 10 20 thousand years. Because of the coupling with the mantle, the rate of forebulge formation and collapse is controlled by mantle viscosity . Glacial One cause for forebulge formation is loading of the continental lithosphere by ice sheet s during continental glaciation s. Because of the removal of the ice sheets, these formerly glaciated areas are currently rising in a phenomenon known as post glacial rebound . Because of the coupling of the mantle with the plates, data from post glacial rebound are used as a direct probe of the viscosity of the upper mantle. As the ice melts and the land under it rises by isostatic recovery, the forebulge also subsides. Forebulge subsidence is the reason why the Netherlands and parts of southern England have been slowly sinking in the present day. ref p54 in Doggerland a Speculative Survey , by B.J.Coles, Proceedings of the Prehistoric Society , 64 1998 pp 45 81. ref One estimate ref Glacial deposits of Britain and Europe general overview , by D.Ehlers, P.Gibbard, & Tj.C.E van Weering, 1979 in Glacial Deposits in Britain and Ireland ... of a thin elastic beam or plate i.e., the lithosphere . The magnitude of the flexure goes as an exponentially decaying sinusoid. The lithosphere is therefore anomalously high at a flexural half wavelength ... of the lithosphere. References references Deglaciation, Earth crustal behaviour and sea level changes ... more details
Ridge push or sliding plate force is a proposed mechanism for plate motion in plate tectonics . Because mid ocean ridges lie at a higher elevation than the rest of the ocean floor, gravity causes the ridge to push on the lithosphere that lies farther from the ridge. As molten magma rises at a mid ocean ridge it heats the rocks around it. The heat expelled by the magma expands the lithosphere and asthenosphere at the ridge, pushing them above the surrounding ocean floor . As time passes, the heated rocks cool and their density increases. When this happens gravity pulls the weighty lithosphere away from the mid ocean ridge, down the sloping asthenosphere, which, in turn, allows new molten magma to well up. This fresh magma will eventually become new lithosphere. The cooling rock exerts a force on spreading lithospheric plates, helping to drive their movements. The force is called ridge push. It can be calculated by the principle of isostasy , making a balance between the mid ocean ridge and the old ocean floor. Notably, in such a calculation, the force depends only on the temperature of the asthenosphere at the ridge the same in all normal ridges, though higher at Hotspot geology hotspots , and not on the spreading rate of the ridge. Another force, that for some plates exceeds ridge push, is slab pull , where the weight of a Subduction subducting slab pulls the plate at the surface along. References Cite web url http powerpoints.geology guy.com pipkin pipkin chapter3.pdf title Plate tectonics, based on Geology and the Environment , 5 ed Earth , 9 ed Cite journal author White, R. and McKenzie, D. year 1989 title Magmatism at rift zones The generation of volcanic continental margins and flood basalts journal J. Geophys. Res. volume 94 pages 7685 7729 tectonics stub physical oceanography expanded other Category Geodynamics Category Tectonics ... more details
Sources date April 2010 In geology , plating is a hypothesized process whereby asthenosphere asthenospheric Mantle geology mantle hardens beneath Crust geology crustal material, thereby becoming attached to it and thereafter moving together with the crustal material as part of the lithosphere . A complementary process, although it does not necessarily always involve the upper mantle, is called delamination geology delamination . See also Delamination geology Ophiolite Category Plate tectonics tectonics stub ... more details
Earth crustal displacement OR Earth crust displacement may refer to Plate tectonics , scientific theory which describes the large scale motions of Earth s crust lithosphere . Fault geology , fracture in Earth s crust where one side moves with respect to the other side. Supercontinent cycle , the quasi periodic aggregation and dispersal of Earth s continental crust. Cataclysmic pole shift hypothesis , where the axis of rotation of a planet may have shifted or the crust may have shifted dramatically. disambig ... more details
Notes on usage This table is a reference tool for rapidly locating Wikipedia articles on global climate system components class wikitable Component Type Region Composed Of Functions Dimensions Earth s Atmosphere Atmosphere Global layer Planetary Atmospheric gases nitrogen, oxygen and others Absorb and distribute radiation exchange gases Hydrosphere Global layer Planetary Water H sub 2 sub O and dissolved minerals carbon, calcium, magnesium and others Absorb and distribute radiation supply vapor Lithosphere Global layer Planetary Rocks and minerals Supply minerals Troposphere Atmospheric layer Planetary Air, water vapor Weather Tropopause Atmospheric layer Planetary Air Thin layer of temperature NASA NASA US identifies the five components of earth s climate system as Earth s Atmosphere Atmosphere , hydrosphere , cryosphere , lithosphere , and biosphere . ref http earthobservatory.nasa.gov Glossary index.php?mode alpha&seg b&segend d ref References Reflist Climate stub Category Climatology ... more details
or lithosphere. This type of tectonics is found at zones of continental collision , at restraining ... with the relative lateral movement of parts of the crust or lithosphere. This type of tectonics ... as a single mechanical layer, the lithosphere . The lithosphere is divided into separate plates that move ... boundary Divergent boundary divergent where plates move apart from each other and new lithosphere ... each other and convergent boundary convergent where plates converge and lithosphere is consumed by the process ... in the lithosphere and are responsible for most of the world s major Moment magnitude scale M ... s volcano volcanoes , such as around the Pacific Ring of Fire . Most of the deformation in the lithosphere ... more details
, magma rises into the upper mantle and crust. As it moves away from the ridge, the lithosphere becomes cooler and denser, and sediment gradually builds on top of it. The youngest oceanic lithosphere ... 521 89307 0 ref The oceanic lithosphere Subduction subducts at what are known as Convergent boundary convergent boundaries . These boundaries can exist between oceanic lithosphere on one plate and oceanic lithosphere on another, or between oceanic lithosphere on one plate and continental lithosphere on another. In the second situation, the oceanic lithosphere always subducts because the continental lithosphere is less dense. The subduction process consumes older oceanic lithosphere, so oceanic crust ... oc540 lec01 1 title Ocean 540 Oceanic Lithosphere Plate Tectonics Seafloor Topography ... more details
Orphan date February 2009 The Hawaiian Trough , also known as the Hawaiian Deep , is a depression geology depression of the sea floor surrounding the Hawaiian Islands , where the massive weight of the island chain downwarps the oceanic lithosphere surrounding the islands like a moat , it is roughly 5500 meters deep. http www.mbari.org volcanism Hawaii HR FlexArch.htm However, in accordance with the principle of isostasy , the sinking of the lithosphere is balanced by a corresponding rise beyond it, known as the Hawaiian Arch . http www.mbari.org volcanism Hawaii HR FlexArch.htm The Big Island itself is still subsiding, at a rate of about 2.5 millimeters per year. http volcano.und.edu vwdocs hawaii review intro intro.html Sources http www.mbari.org volcanism Hawaii HR FlexArch.htm Hawaiian Submarine Volcanism http volcano.und.edu vwdocs hawaii review intro intro.html Volcano World Introduction to Hawaiian Volcanoes External links http pubs.usgs.gov sim 2004 2824 SIM 2824 pamphlet.pdf Overview of Hawaiian Arch geology PDF http www.usssp iodp.org PDFs Greatest Hits Rhythms Garcia.pdf New Evidence for Massive Landslides from the Hawaiian Islands PDF See also Hawaiian Arch Submarine landslide Category Geology of Hawaii Category Oceanography Category Marine geology geology stub ... more details
Unreferenced date March 2009 Image Lithoprobelogo3.png right Lithoprobe is a Canada Canadian national geoscience research project funded by the Natural Sciences and Engineering Research Council . Its aim is to research and map the lithosphere structure and composition. Lithoprobe derives from probing the lithosphere . Recently summarized in the GSA Today magazine, June 2011 issue. Notable contributors Richard Lee Armstrong Ronald M. Clowes , Director 1987 Hu Gabrielse Thomas Edvard Krogh 1991 1996 James Monger John Oliver Wheeler , lobbied for establishment of the project, Chairman of steering committee two years Harold Williams geologist Harold Williams External links http www.lithoprobe.ca Lithoprobe website http www.litho.ucalgary.ca atlas atlas.html Lithoprob atlas http www.eps.mcgill.ca litho method.html Lithoprobe Methodology http gdr.nrcan.gc.ca seismtlitho archive index e.php Lithoprobe Data Archive http www.geosociety.org gsatoday archive 21 6 article i1052 5173 21 6 4.htm GSA Today volume 21 Issue 6 June 2011 The big picture A lithospheric cross section of the North American continent Category Geology Category Scientific organizations based in Canada Science stub Canada org stub ... more details
A collision zone occurs when tectonic plate s meeting at a convergent boundary both bear continental lithosphere . As continental lithosphere is usually not subduction subducted due to its relative low density, the result is a complex area of orogeny involving Fold geology folding and thrust fault ing as the blocks of continental crust pile up above the subduction zone. Examples Notable examples include Philippine Mobile Belt Molucca Sea Collision Zone Izu Collision Zone cn date September 2011 Ishikari Collision Zone cn date September 2011 Mount Fuji Collision Zone cn date September 2011 Carlin Unconformity Daisetsuzan Collision Zone cn date September 2011 Luzon Taiwan Collision Zone cn date September 2011 Indus Yarlung suture zone Eastern Anatolian collision zone ref R G k, R., et. al. Lithospheric structure of the continent continent collision zone eastern Turkey, Geophysical Journal International, 2007, Volume 169, Issue 3, Pages 789 1378 ref Banda Arc Australian collision zone ref Karig, Daniel E., et. al., Nature and distribution of deformation across the Banda Arc Australian collision zone at Timor, GSA Bulletin January 1987 v. 98 no. 1 p. 18 32 ref See also List of tectonic plate interactions References reflist Category Tectonics tectonics stub sv Kollisionzon ... more details
File MLIP igneous figures.png thumb right 250px alt An image showing a zone with related features. Tectonic and magmatic features associated with the Mackenzie Large Igneous Province, including the rifting that created the Poseidon Ocean. Red star shows the initial Mackenzie plume zone relative to the lithosphere. The Poseidon Ocean is a supposed ocean that existed in the Mesoproterozoic period of the geologic timescale between 1600 and 1000 million years ago . It began to form when a hotspot geology hotspot collided with lithosphere that was already in an extensional regime that allowed rifting to occur at the onset of hotspot volcanism that created the Mackenzie Large Igneous Province . This hotspot, known as the Mackenzie hotspot , produced passive rifting to form a triple junction . As two of the rift arms continued to grow, they created the Poseidon Ocean basin. The third rift arm failed to open fully, creating an aulacogen . ref cite book last Ernst first Richard E. coauthors Buchan, Kenneth L. title Mantle plumes their identification through time publisher Geological Society of America year 2001 pages 148 url http books.google.ca books?id X4W9aGXDa9cC&pg PA261&lpg PA261&dq anahim hotspot&source bl&ots BQnqvzgq9K&sig 7gRnMRoyzaBGkyl1 M26gfYVu38&hl en&ei AtVPS8KJApD2NZnmjZcJ&sa X&oi book result&ct result&resnum 7&ved 0CBYQ6AEwBjgU v onepage&q anahim 20hotspot&f false isbn 0 8137 2352 3 accessdate 2009 04 11 ref References reflist Paleo geo stub Category Historical oceans Category Proterozoic ... more details
Ecosphere has several different meanings In ecology the term ecosphere can refer to the Earth s spheres , a planetary ecosystem consisting of the atmosphere, the geosphere lithosphere , the hydrosphere, and the biosphere. In astronomy an ecosphere is an imaginary shell of space surrounding stars where conditions are such that life might survive. See habitable zone . Ecosphere aquarium is a water filled sealed glass ball containing living algae and shrimp in a stable miniature ecosystem. disambig de Ecosphere es Ecoesfera fr co sph re science gl Ecoesfera ja nl Ecosfeer pt Ecosfera vls Ecosfeer zh ... more details
Unreferenced date October 2006 The seismogenic layer is the range of depths within the crust geology crust or lithosphere over which most earthquake s are initiated. Typically in continental crust this is in the uppermost 15 km. The base of this layer represents the downwards change in deformation mechanism from elastic and frictional processes associated with brittle faulting to a generally aseismic zone where Creep deformation ductile creep becomes the dominant process. The location of this change in deformation style is sometimes referred to as the Brittle ductile transition zone . DEFAULTSORT Seismogenic Layer Category Structure of the Earth Category Seismology and earthquake terminology Geophysics stub ... more details
If a load is placed on the lithosphere, it will tend to flex in the manner of an elastic plate ... of the lithosphere, and the wavelength of flexure is a function of flexural rigidity alone. Flexural ... chain of volcanic edifices has sufficient mass to cause deflection in the lithosphere. The obduction ..., or the Ebro basin next to the Pyrenees in Spain. Strike slip deformation Deformation of the lithosphere ... more details
325 isbn 0 931541 61 1 ref Plates can be formed from either oceanic lithosphere or continental lithosphere ... sites of convective downwelling of the Earth s lithosphere the crust geology crust plus the top ... plate of lithosphere oceanic lithosphere converges with another plate. The down going slab geology ..., the density of the oceanic lithosphere increases and it is carried into the Earth s mantle mantle by the downwelling convective currents. It is at subduction zones that the Earth s lithosphere ... a centrifuge using a lighter and denser brittle and ductile lithosphere floating on still denser ... of the denser ductile lithosphere below its lighter counterpart. Consequently, the lighter lithosphere was uplifted, then collapsed on the denser slab, increasing the load on its edge and driving ... lithosphere was set below the lighter one, it underwent conversion to eclogite, which increased ... lithosphere, such as the Mariana Islands Mariana or Tonga island arcs, or continental arc ... of oceanic lithosphere beneath another oceanic lithosphere oceanic subduction , while continental arcs formed during subduction of oceanic lithosphere beneath a continental lithosphere. The arc ... lithosphere. Seismic tomography has helped detect subducted lithosphere in regions where there are no earthquakes ... lithosphere, called a slab, subducts horizontally or nearly horizontally. The flat slab can extend ... 70 occurs in subduction zones where earth s oceanic crust and lithosphere are old and thick ... needed date May 2011 Subduction Zone Physics Sinking of the oceanic lithosphere sediments crust mantle , by contrast of density between the cold and old lithosphere and the hot asthenospheric mantle ... crust . Subduction zones drag down subducted oceanic sediments, oceanic crust, and mantle lithosphere ... more details
The Nevadan Orogeny was a major mountain building event that took place along the western edge of ancient North America between the Mid to Late Jurassic between about 180 and 140 million years ago . ref cite web url http www.gorp.com parks guide travel ta yosemite hiking california sidwcmdev 056847.html last Shaffer first Jeffrey P. title Evolution of the Yosemite Landscape The Nevadan Orogeny work One Hundred Hikes in Yosemite ref The Nevadan orogeny was the first of three major mountain building episodes to transform Western North America between the Late Mesozoic and Early Cenozoic Eras, the latter two being the Sevier orogeny Sevier and Laramide orogeny , chronologically. Much like the two orogenies that followed, the Nevadan was caused by the subduction of Oceanic crust oceanic lithosphere at a subduction zone running along the edge of the North American continent. This resulted in relatively cool oceanic crust descending into the lithosphere very quickly, and steeply beneath the edge of the continent . Due to dehydration and release of volatiles from the subducted plate, the mantle above the down going plate was melted. This magma rose through the mantle wedge and the continental crust to produce an arc of extrusive volcanoes with large intrusive batholith s beneath. These intrusive batholiths are presently exposed as the Sierra Nevada batholith s. Due to the steep angle of the subducted plate, these were located relatively close to continent s edge. See also Sierran Arc References Refimprove date June 2010 reflist Category Orogeny Category Jurassic Category Natural history of North America Category Geology of the United States Category Geology of California Category Sierra Nevada U.S. tectonics stub pt Orogenia do Nevada ... more details
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