Seafloor Spreading and Subduction Unit Exam Study Guide You
... You should know the following: 1. Continental Drift. Evidence for continental drift; Pangea; problems with the theory/missing evidence. 2. Seafloor features. Names of features; where on the seafloor they are located; what the seafloor looks like. 3. Seafloor ages. Patterns of ages and age distributi ...
... You should know the following: 1. Continental Drift. Evidence for continental drift; Pangea; problems with the theory/missing evidence. 2. Seafloor features. Names of features; where on the seafloor they are located; what the seafloor looks like. 3. Seafloor ages. Patterns of ages and age distributi ...
Continuing evolution of the Pacific–Juan de Fuca–North America
... configurations by modeling future fault activity and resultant margin geometries. 2. Kinematic model of San Andreas transform plate boundary Numerous volcanoes erupted in the California forearc when ridge segments of the East Pacific Rise encountered the North America subduction zone (Fig. 4). Wilson ...
... configurations by modeling future fault activity and resultant margin geometries. 2. Kinematic model of San Andreas transform plate boundary Numerous volcanoes erupted in the California forearc when ridge segments of the East Pacific Rise encountered the North America subduction zone (Fig. 4). Wilson ...
Dynamic Earth Assessment Test Results
... b. Mountain formation c. Volcanic eruption d. Rift formation You answered correctly! 12. Which of these statements is correct? a. Continental crust is thicker than oceanic crust. b. Continental crust is thinner than oceanic crust. c. Oceanic crust is thicker than continental crust. d. Continental an ...
... b. Mountain formation c. Volcanic eruption d. Rift formation You answered correctly! 12. Which of these statements is correct? a. Continental crust is thicker than oceanic crust. b. Continental crust is thinner than oceanic crust. c. Oceanic crust is thicker than continental crust. d. Continental an ...
Dynamic topography above retreating subduction zones
... properties of the underlying mantle, the ridge axis is expected to exhibit an approximately uniform depth along its length. Lateral conduction of heat across the edge of the basin (at the ends of the spreading ridge), as well as the poloidal vs. toroidal flow, would be expected to create colder man ...
... properties of the underlying mantle, the ridge axis is expected to exhibit an approximately uniform depth along its length. Lateral conduction of heat across the edge of the basin (at the ends of the spreading ridge), as well as the poloidal vs. toroidal flow, would be expected to create colder man ...
Plate Tectonics and Landform Evolution
... landscape forms and their evolution. Extensional tectonic regimes are primarily associated with divergent plate boundaries, but can also commonly be found in plate interiors in the form of localized rift zones and extensional basins. Another widespread setting for extensional tectonics are upper pla ...
... landscape forms and their evolution. Extensional tectonic regimes are primarily associated with divergent plate boundaries, but can also commonly be found in plate interiors in the form of localized rift zones and extensional basins. Another widespread setting for extensional tectonics are upper pla ...
A case for drilling the Dufek layered mafic intrusion, Antarctica
... between one mineral type in different rocks and between different mineral types in the same rock. Differences between minerals in the same rock become more pronounced toward the top of the intrusion, explicable by the assimilation of a small amount of the area’s Precambrian to Permian metasedimentar ...
... between one mineral type in different rocks and between different mineral types in the same rock. Differences between minerals in the same rock become more pronounced toward the top of the intrusion, explicable by the assimilation of a small amount of the area’s Precambrian to Permian metasedimentar ...
Plate Tectonics Notes # 2
... like silly putty , bread dough, or HONEY . This zone was discovered because it was found that seismic waves decrease in velocity from 100km to 700km below the Earth’s surface. (Seismic waves travel more slowly through liquids than solids). It is a plastic-like portion of the upper mantle that is par ...
... like silly putty , bread dough, or HONEY . This zone was discovered because it was found that seismic waves decrease in velocity from 100km to 700km below the Earth’s surface. (Seismic waves travel more slowly through liquids than solids). It is a plastic-like portion of the upper mantle that is par ...
tectonic plates - geraldinescience
... How Continents Move, continued • The lithosphere forms the thin outer shell of Earth and is broken into several blocks or tectonic plates. • The tectonic plates ride on the asthenoshpere in much the same way that blocks of wood float on water. • Tectonic plates can include continental crust, oceanic ...
... How Continents Move, continued • The lithosphere forms the thin outer shell of Earth and is broken into several blocks or tectonic plates. • The tectonic plates ride on the asthenoshpere in much the same way that blocks of wood float on water. • Tectonic plates can include continental crust, oceanic ...
Earthquakes, Volcanoes, and Plate Tectonics
... Convergent Plate Boundaries A common location for volcanoes to form is along convergent plate boundaries. More dense oceanic plates sink beneath less dense plates that they collide with. This sets up conditions that form volcanoes. When one plate sinks beneath another, basalt and sediment on an ocea ...
... Convergent Plate Boundaries A common location for volcanoes to form is along convergent plate boundaries. More dense oceanic plates sink beneath less dense plates that they collide with. This sets up conditions that form volcanoes. When one plate sinks beneath another, basalt and sediment on an ocea ...
Plate Tectonics - Flushing High School
... o Characteristics: These boundaries commonly occur in the midst of ocean basins and they contain numerous transform fault (fracture zone) offsets. Frequently this results in a Frankenstein-like zipper pattern to the plate boundary. Earthquakes are common although they are usually shallower and of le ...
... o Characteristics: These boundaries commonly occur in the midst of ocean basins and they contain numerous transform fault (fracture zone) offsets. Frequently this results in a Frankenstein-like zipper pattern to the plate boundary. Earthquakes are common although they are usually shallower and of le ...
The spatial extent and characteristics of block fields in Alpine areas
... Oceanic intraplate volcanic chains unrelated to plumes have yet been related to a dynamic (small-scale convective instabilities, SSC) or static mantle (e.g. lithospheric cracking, Sandwell et al. 1995). In the Earth's uppermost mantle SSC is likely to develop due to instabilities of the thickened th ...
... Oceanic intraplate volcanic chains unrelated to plumes have yet been related to a dynamic (small-scale convective instabilities, SSC) or static mantle (e.g. lithospheric cracking, Sandwell et al. 1995). In the Earth's uppermost mantle SSC is likely to develop due to instabilities of the thickened th ...
Plate motions in the Alpine region and their correlation to the
... Adriatic plate disintegrates and, as a consequence, its northern part rotates in the opposite direction (see M A U R I T S C H and FRISCH, this vol.). The collision is responsible for intense deformation and nappe formation in internal parts of the Alps and is also reflected by the radiometric 80 m. ...
... Adriatic plate disintegrates and, as a consequence, its northern part rotates in the opposite direction (see M A U R I T S C H and FRISCH, this vol.). The collision is responsible for intense deformation and nappe formation in internal parts of the Alps and is also reflected by the radiometric 80 m. ...
101_MT2_V2_S08
... at all and others may be used more than once! (12 pts) 1) _____________________________ are open holes in volcanic rocks. 2) _____________________________ is a term used to refer to magmas or rocks that are high in silica and low in iron and magnesium. 3) _____________________________ is a continent ...
... at all and others may be used more than once! (12 pts) 1) _____________________________ are open holes in volcanic rocks. 2) _____________________________ is a term used to refer to magmas or rocks that are high in silica and low in iron and magnesium. 3) _____________________________ is a continent ...
(a) Continental Margins
... (also Artic Ocean, Antarctica and Indian Ocean). Very little volcanic or earthquake activity is associated with passive margins. (b) active or leading margins: plate boundary located along a continental margin – ocean trenches where there is subduction of oceanic lithosphere – narrow, steep, with vo ...
... (also Artic Ocean, Antarctica and Indian Ocean). Very little volcanic or earthquake activity is associated with passive margins. (b) active or leading margins: plate boundary located along a continental margin – ocean trenches where there is subduction of oceanic lithosphere – narrow, steep, with vo ...
How do subduction processes contribute to forearc Andean uplift
... (Iquique and Juan Fernandez Ridges, located at 21◦ and 33◦ S, respectively). The corresponding topographic anomalies, however, are much smaller and their effect on coastal uplift is not clear, despite the fact that the Juan Fernandez Ridge is suspected to be responsible for the appearance of a flat-s ...
... (Iquique and Juan Fernandez Ridges, located at 21◦ and 33◦ S, respectively). The corresponding topographic anomalies, however, are much smaller and their effect on coastal uplift is not clear, despite the fact that the Juan Fernandez Ridge is suspected to be responsible for the appearance of a flat-s ...
Slide 1
... classification scheme should not just create "order from the chaos", but highlight patterns that are useful for predicting stratigraphy, and faulting. Dickinson's (1974) classification scheme is based on tectonic history: (a) lithospheric substratum: oceanic versus continental (b) proximity of the b ...
... classification scheme should not just create "order from the chaos", but highlight patterns that are useful for predicting stratigraphy, and faulting. Dickinson's (1974) classification scheme is based on tectonic history: (a) lithospheric substratum: oceanic versus continental (b) proximity of the b ...
Lauren Winner G355 Lab Write-up May 18, 2010 Laboratory Title
... this causes many events. Where two plates slide past one another laterally enormous amounts of built up pressure is released in the form of earthquakes. This is illustrated by the transform fault. The side-to-side movement causes a great deal of friction. A third type of plate movement is compressio ...
... this causes many events. Where two plates slide past one another laterally enormous amounts of built up pressure is released in the form of earthquakes. This is illustrated by the transform fault. The side-to-side movement causes a great deal of friction. A third type of plate movement is compressio ...
SGES 1302 Lecture4
... Seafloor spreading occurs at mid-ocean ridges, where new oceanic crust is formed through volcanic activity and then gradually moves away from the ridge. Seafloor spreading helps explain continental drift in the theory of plate tectonics. ...
... Seafloor spreading occurs at mid-ocean ridges, where new oceanic crust is formed through volcanic activity and then gradually moves away from the ridge. Seafloor spreading helps explain continental drift in the theory of plate tectonics. ...
Low-Density Anomalies in the Mantle
... years, different aspects of this hypothesis were considered: the heat source and mechanisms of plume ascent [2–4]; isotope-geochemical features [3, 5–8]; manifestation in geophysical fields [3, 9–11]; and so on. In classical models, a plume is a low-density mantle material ascent to the Earth’s surf ...
... years, different aspects of this hypothesis were considered: the heat source and mechanisms of plume ascent [2–4]; isotope-geochemical features [3, 5–8]; manifestation in geophysical fields [3, 9–11]; and so on. In classical models, a plume is a low-density mantle material ascent to the Earth’s surf ...
Drillers propose deep-Earth quest By Jonathan Amos Science
... mantle and the crust (known as the Mohorovicic Discontinuity, or Moho), and then also the nature of the mantle itself." The mantle makes up the bulk of our planet's volume and mass. It stretches from the bottom of the crust down to the Earth's iron-nickel core some 2,900km further down. Its rocks ar ...
... mantle and the crust (known as the Mohorovicic Discontinuity, or Moho), and then also the nature of the mantle itself." The mantle makes up the bulk of our planet's volume and mass. It stretches from the bottom of the crust down to the Earth's iron-nickel core some 2,900km further down. Its rocks ar ...
Dynamic effects of aseismic ridge subduction: numerical modelling
... production associated with flat slabs that may explain gaps in recent active volcanism at low-angle subduction margins. Lowering of magmatic rock production is caused by the absence of a hot mantle wedge above the flat slabs and does not directly depend on the mechanism responsible for the triggerin ...
... production associated with flat slabs that may explain gaps in recent active volcanism at low-angle subduction margins. Lowering of magmatic rock production is caused by the absence of a hot mantle wedge above the flat slabs and does not directly depend on the mechanism responsible for the triggerin ...
Name - cloudfront.net
... related to any earth structures? The earth’s outer shell of rock is believed to be made up of a number of rigid plates, called Lithospheric plates, which are from 80 km to 160 km thick. The plates are made up of the two upper rock zones of the earth, the crust and the upper portion of the mantle. So ...
... related to any earth structures? The earth’s outer shell of rock is believed to be made up of a number of rigid plates, called Lithospheric plates, which are from 80 km to 160 km thick. The plates are made up of the two upper rock zones of the earth, the crust and the upper portion of the mantle. So ...
Oceanic trench
The oceanic trenches are hemispheric-scale long but narrow topographic depressions of the sea floor. They are also the deepest parts of the ocean floor. Oceanic trenches are a distinctive morphological feature of convergent plate boundaries, along which lithospheric plates move towards each other at rates that vary from a few mm to over ten cm per year. A trench marks the position at which the flexed, subducting slab begins to descend beneath another lithospheric slab. Trenches are generally parallel to a volcanic island arc, and about 200 km (120 mi) from a volcanic arc. Oceanic trenches typically extend 3 to 4 km (1.9 to 2.5 mi) below the level of the surrounding oceanic floor. The greatest ocean depth to be sounded is in the Challenger Deep of the Mariana Trench, at a depth of 11,034 m (36,201 ft) below sea level. Oceanic lithosphere moves into trenches at a global rate of about 3 km2/yr.