Powerpoint Review for Core Mantle Crust Test
... Ocean crust is much denser than continental crust, however it is also much ____________ than Oceanic crust. ...
... Ocean crust is much denser than continental crust, however it is also much ____________ than Oceanic crust. ...
Sample Exam Geology
... 65. Which one of the following most accurately describes the volcanoes of the Hawaiian Islands? a. stratovolcanoes associated with subduction and a convergent plate boundary b. shield volcanoes fed by a long-lived hot spot below the Pacific lithospheric plate c. shield volcanoes associated with a mi ...
... 65. Which one of the following most accurately describes the volcanoes of the Hawaiian Islands? a. stratovolcanoes associated with subduction and a convergent plate boundary b. shield volcanoes fed by a long-lived hot spot below the Pacific lithospheric plate c. shield volcanoes associated with a mi ...
Section 13
... Describe how the presence of ocean water in crustal rocks might affect formation of magma . Ocean water in ocean rock can lower the melting point of the rock and aid the formation of magma. ...
... Describe how the presence of ocean water in crustal rocks might affect formation of magma . Ocean water in ocean rock can lower the melting point of the rock and aid the formation of magma. ...
Section 13
... Describe how the presence of ocean water in crustal rocks might affect formation of magma . Ocean water in ocean rock can lower the melting point of the rock and aid the formation of magma. ...
... Describe how the presence of ocean water in crustal rocks might affect formation of magma . Ocean water in ocean rock can lower the melting point of the rock and aid the formation of magma. ...
Plate Tectonics II - Clark Science Center
... narrow shelf dropping off quickly to the trench (“active” cont. margin) ...
... narrow shelf dropping off quickly to the trench (“active” cont. margin) ...
Geologic History - Teacher Friendly Guides
... hundreds of millions of years, between 2.5 and 1.25 billion years ago. The shield was the first section of the North American continent to emerge above sea level, and it remains the largest exposure of Precambrian-aged rock in the world. Seven distinct provinces compose the nucleus that is the Canad ...
... hundreds of millions of years, between 2.5 and 1.25 billion years ago. The shield was the first section of the North American continent to emerge above sea level, and it remains the largest exposure of Precambrian-aged rock in the world. Seven distinct provinces compose the nucleus that is the Canad ...
Paleoproterozoic Metamorphism in the Northern Wyoming Province
... The identity of the 11.77-Ga terrane or microcontinent that may have collided with the northern Wyoming province along a generally SW-NE vector is difficult to specify. Evidence of 11.77-Ga crust in the western GFTZ and areas farther west, however, is quite abundant. For example, Leeman et al. (1985 ...
... The identity of the 11.77-Ga terrane or microcontinent that may have collided with the northern Wyoming province along a generally SW-NE vector is difficult to specify. Evidence of 11.77-Ga crust in the western GFTZ and areas farther west, however, is quite abundant. For example, Leeman et al. (1985 ...
Anatomy of melt intrusion at 15–18 km depth beneath Upptyppingar
... An extended sequence of micro-earthquakes at 14– 22 km depth near Upptyppingar in the northern volcanic rift zone of Iceland has been attributed to the injection of melt into the crust (Jakobsdóttir et al., 2008). The main sequence lasted more than 2 years, starting in February 2007 and extended ove ...
... An extended sequence of micro-earthquakes at 14– 22 km depth near Upptyppingar in the northern volcanic rift zone of Iceland has been attributed to the injection of melt into the crust (Jakobsdóttir et al., 2008). The main sequence lasted more than 2 years, starting in February 2007 and extended ove ...
How Do Earthquakes Tell Us About the Earth`s Interior?
... • When a wave (light, sound, H2O) passes from one material to another, it refracts (bends) or reflects (bounces back) – Waves change speed between mediums – In water, changes occur with depth – In Earth, w/density ...
... • When a wave (light, sound, H2O) passes from one material to another, it refracts (bends) or reflects (bounces back) – Waves change speed between mediums – In water, changes occur with depth – In Earth, w/density ...
Ch. 10 Crustal Deformation
... Thrust faults exist at all scales. Small thrust faults exhibit displacement on the order of millimeters to a few meters. Some large thrust have displacements on the order of tens to hundreds of kilometers. Thrust faulting is most pronounced in subduction zones and other convergent boundaries where p ...
... Thrust faults exist at all scales. Small thrust faults exhibit displacement on the order of millimeters to a few meters. Some large thrust have displacements on the order of tens to hundreds of kilometers. Thrust faulting is most pronounced in subduction zones and other convergent boundaries where p ...
Geomorphology
... Sites of lateral movement Crust is neither created nor destroyed The rigid and brittle lithospheric plates overlie the molten and plastic asthenosphere. Currents in the mantle move and form convection currents. When the current moves to the surface, it diverges. As it moves up it pushes the plat ...
... Sites of lateral movement Crust is neither created nor destroyed The rigid and brittle lithospheric plates overlie the molten and plastic asthenosphere. Currents in the mantle move and form convection currents. When the current moves to the surface, it diverges. As it moves up it pushes the plat ...
Structural Analysis of the Johnson Shear Zone in the Gemmell Lake
... The east-trending Johnson Shear Zone is located within the southern Paleoproterozoic Lynn Lake greenstone belt. It forms the boundary between the 1910 Ma (Baldwin et al., 1987) metavolcanic and metavolcaniclastic Wasekwan Group (Bateman, 1945) and the 1876 Ma (Baldwin et al., 1987) Pool Lake plutoni ...
... The east-trending Johnson Shear Zone is located within the southern Paleoproterozoic Lynn Lake greenstone belt. It forms the boundary between the 1910 Ma (Baldwin et al., 1987) metavolcanic and metavolcaniclastic Wasekwan Group (Bateman, 1945) and the 1876 Ma (Baldwin et al., 1987) Pool Lake plutoni ...
Setting Based Classification
... • This type of metamorphism is associated with convergent plate margins • Dynamo-thermal, involving one or more episodes of orogeny with combined elevated geothermal gradients and deformation (deviatoric stress) • Foliated rocks are a characteristic product ...
... • This type of metamorphism is associated with convergent plate margins • Dynamo-thermal, involving one or more episodes of orogeny with combined elevated geothermal gradients and deformation (deviatoric stress) • Foliated rocks are a characteristic product ...
Document
... When do mountain chains form? • Mountain chains form when continental landmasses that have the same rock density converge. Since they have similar density, one plate can’t be subducted under the other. The pressure of the impinging plates can only be relieved by thrusting skyward forming mountain p ...
... When do mountain chains form? • Mountain chains form when continental landmasses that have the same rock density converge. Since they have similar density, one plate can’t be subducted under the other. The pressure of the impinging plates can only be relieved by thrusting skyward forming mountain p ...
File
... The continental lithosphere is about 150 kilometres (93 miles) thick with a low-density crust and upper-mantle that are permanently buoyant. Continents drift laterally along the convecting system of the mantle away from hot mantle zones toward cooler ones, a process known as continental drift. Most ...
... The continental lithosphere is about 150 kilometres (93 miles) thick with a low-density crust and upper-mantle that are permanently buoyant. Continents drift laterally along the convecting system of the mantle away from hot mantle zones toward cooler ones, a process known as continental drift. Most ...
Appalachian Mountains
... Divergent-Boundary Mountains An ocean ridge is a broad, topographic high that forms as lithosphere bulges upward due to an increase in temperature along a divergent boundary. ...
... Divergent-Boundary Mountains An ocean ridge is a broad, topographic high that forms as lithosphere bulges upward due to an increase in temperature along a divergent boundary. ...
Geological summary of the Magdalena mining district, Socorro
... central ridge composed principally of Precambrian rocks that have been stripped of their sedimentary cover by erosion. To the east of this central ridge and at lower altitudes, Precambrian sedimentary and igneous rocks and some younger volcanic rocks underlie an extensive area of rugged mountainous ...
... central ridge composed principally of Precambrian rocks that have been stripped of their sedimentary cover by erosion. To the east of this central ridge and at lower altitudes, Precambrian sedimentary and igneous rocks and some younger volcanic rocks underlie an extensive area of rugged mountainous ...
Earths Internal Structure ws File
... Crust: The crust is the thin, solid, outermost layer of the Earth. The crust is composed mainly of basalt and granite and, with the uppermost part of the upper mantle, is broken into tectonic plates. The crust is cooler and more rigid than the deeper layers. The thickness of the crust varies conside ...
... Crust: The crust is the thin, solid, outermost layer of the Earth. The crust is composed mainly of basalt and granite and, with the uppermost part of the upper mantle, is broken into tectonic plates. The crust is cooler and more rigid than the deeper layers. The thickness of the crust varies conside ...
Geologic Time - Logan County Schools
... FOSSILS AND PAST ENVIRONMENTS Fossils provide evidence about the past climate of a region. Example coal is found in Antarctica. Since coal is formed from the remains of dead plants and animals, this means that at one time in Earth’s history, Antarctica had to be warm enough to support that ty ...
... FOSSILS AND PAST ENVIRONMENTS Fossils provide evidence about the past climate of a region. Example coal is found in Antarctica. Since coal is formed from the remains of dead plants and animals, this means that at one time in Earth’s history, Antarctica had to be warm enough to support that ty ...
Earth Science Course: Aims 1.) Stud
... the past existence of Pangaea? *How does seafloor spreading help explain how continents moved apart? *How does new seafloor form at mid-ocean ridges? *What are some general ways that plates interact? *What happens when seismic energy is released as rocks in Earth’s crust break and move? *What featur ...
... the past existence of Pangaea? *How does seafloor spreading help explain how continents moved apart? *How does new seafloor form at mid-ocean ridges? *What are some general ways that plates interact? *What happens when seismic energy is released as rocks in Earth’s crust break and move? *What featur ...
Document
... B. lowering of sea level with respect to a continent C. rapid sea floor spreading D. formation of large glaciers. 10. Of the following, which was not used by 19th century geologists for developing the geologic column? A. fossil succession B. radiometric age dating C. superposition D. rock types and ...
... B. lowering of sea level with respect to a continent C. rapid sea floor spreading D. formation of large glaciers. 10. Of the following, which was not used by 19th century geologists for developing the geologic column? A. fossil succession B. radiometric age dating C. superposition D. rock types and ...
fossil record
... – of any layered (stratified) rock, – but primarily with sedimentary rocks and their ...
... – of any layered (stratified) rock, – but primarily with sedimentary rocks and their ...
J.G. Hinchey and V. McNicoll - Department of Natural Resources
... phyric rhyolite that are intensely altered to mineral assemblages comprising variable amounts of sericite, pyrite, chlorite, carbonate and quartz. The impact of recrystallization is evident in the rhyolitic rocks as polycrystalline quartz, and in the sulphide horizons as coarse-grained crystalline s ...
... phyric rhyolite that are intensely altered to mineral assemblages comprising variable amounts of sericite, pyrite, chlorite, carbonate and quartz. The impact of recrystallization is evident in the rhyolitic rocks as polycrystalline quartz, and in the sulphide horizons as coarse-grained crystalline s ...
The Reykjanes Peninsula Oblique Rift, a zone of crustal extension
... The structure of the plate boundaries in Iceland is relatively complex. Several of the plate boundary segments are oblique to the over-all plate velocity vector between the North America and Eurasia Plates. Oblique and immature plate boundaries are frequently characterized by complicated fault patte ...
... The structure of the plate boundaries in Iceland is relatively complex. Several of the plate boundary segments are oblique to the over-all plate velocity vector between the North America and Eurasia Plates. Oblique and immature plate boundaries are frequently characterized by complicated fault patte ...
Algoman orogeny
The Algoman orogeny, known as the Kenoran orogeny in Canada, was an episode of mountain-building (orogeny) during the Late Archean Eon that involved repeated episodes of continental collisions, compressions and subductions. The Superior province and the Minnesota River Valley terrane collided about 2,700 to 2,500 million years ago. The collision folded the Earth's crust and produced enough heat and pressure to metamorphose the rock. Blocks were added to the Superior province along a 1,200 km (750 mi) boundary that stretches from present-day eastern South Dakota into the Lake Huron area. The Algoman orogeny brought the Archaen Eon to a close, about 2,500 million years ago; it lasted less than 100 million years and marks a major change in the development of the earth’s crust.The Canadian shield contains belts of metavolcanic and metasedimentary rocks formed by the action of metamorphism on volcanic and sedimentary rock. The areas between individual belts consist of granites or granitic gneisses that form fault zones. These two types of belts can be seen in the Wabigoon, Quetico and Wawa subprovinces; the Wabigoon and Wawa are of volcanic origin and the Quetico is of sedimentary origin. These three subprovinces lie linearly in southwestern- to northeastern-oriented belts about 140 km (90 mi) wide on the southern portion of the Superior Province.The Slave province and portions of the Nain province were also affected. Between about 2,000 and 1,700 million years ago these combined with the Sask and Wyoming cratons to form the first supercontinent, the Kenorland supercontinent.