Powerpoint Presentation Physical Geology, 10/e
... • When sufficiently cool and dense, these rocks may sink back into the mantle at subduction zones – Downward plunge of cold rocks gives rise to oceanic trenches ...
... • When sufficiently cool and dense, these rocks may sink back into the mantle at subduction zones – Downward plunge of cold rocks gives rise to oceanic trenches ...
Paleomagnetic reconstruction of Coahuila, Mexico
... be traced southwards from localities in Texas to the Mexican border. After entering northern Mexico, north of Coahuila island, its position remains a subject of speculation. Most workers extend the Ouachita frontal zone from the Marathon region to central Chihuahua, but beyond it may either curve we ...
... be traced southwards from localities in Texas to the Mexican border. After entering northern Mexico, north of Coahuila island, its position remains a subject of speculation. Most workers extend the Ouachita frontal zone from the Marathon region to central Chihuahua, but beyond it may either curve we ...
Fault-Block Mountains
... In the southwestern United States and northwestern Mexico, hundreds of mountain ranges line up in rows. The ranges, as well as the valleys between them, formed along nearly parallel normal faults. Mountains that form as blocks of rock move up or down along normal faults are called fault-block mounta ...
... In the southwestern United States and northwestern Mexico, hundreds of mountain ranges line up in rows. The ranges, as well as the valleys between them, formed along nearly parallel normal faults. Mountains that form as blocks of rock move up or down along normal faults are called fault-block mounta ...
The Sveconorwegian magmatic and tectono
... The Precambrian Flekkefjord comple x is situated in t he core zone of the Sveconorwegian orogenic belt in southwestern Norway, covering the transitional zone between the sout h Rogaland anorthosite province to the west and the Agder migmatite terrane to the east.The Flekkefjord complex is divided in ...
... The Precambrian Flekkefjord comple x is situated in t he core zone of the Sveconorwegian orogenic belt in southwestern Norway, covering the transitional zone between the sout h Rogaland anorthosite province to the west and the Agder migmatite terrane to the east.The Flekkefjord complex is divided in ...
Plate Tectonics
... Seamount Chains: Isolated submarine mountains that form chains (e.g., Hawaii). Once they were subaerial volcanoes, but activity ceased and they sank below the ocean - erosion produces a flat top or guyot . Usually an active volcano is at the end of the chain. ...
... Seamount Chains: Isolated submarine mountains that form chains (e.g., Hawaii). Once they were subaerial volcanoes, but activity ceased and they sank below the ocean - erosion produces a flat top or guyot . Usually an active volcano is at the end of the chain. ...
New Investigations of Basement to the Western Athabasca Basin
... metasedimentary rocks in the eastern Lloyd Domain. The Careen Lake Group is mostly variably melted psammopelitic rocks and garnet diatexite, but also contains psammite, garnet-orthopyroxene diatexite, and rare boudins or blocks of quartzite, pelitic restite, amphibolite, and ultramafic rock. Psammop ...
... metasedimentary rocks in the eastern Lloyd Domain. The Careen Lake Group is mostly variably melted psammopelitic rocks and garnet diatexite, but also contains psammite, garnet-orthopyroxene diatexite, and rare boudins or blocks of quartzite, pelitic restite, amphibolite, and ultramafic rock. Psammop ...
Modelessayplatetectheory 18.46KB 2017-03-29
... events Throughout human history we have always wondered about the reasons for volcanic and seismic events, but it wasn’t until geologist Alfred Wegener’s theory of continental drift that anyone seriously considered a geological rather than theological cause. Wegener based his theory primarily on the ...
... events Throughout human history we have always wondered about the reasons for volcanic and seismic events, but it wasn’t until geologist Alfred Wegener’s theory of continental drift that anyone seriously considered a geological rather than theological cause. Wegener based his theory primarily on the ...
esss09 - 4J Blog Server
... According to Wegener’s hypothesis of continental drift, the continents had once been joined to form a single supercontinent. • He called this supercontinent Pangaea, meaning all land. • Wegener believed that about 200 million years ago Pangaea began breaking into smaller continents. Fossil evidence ...
... According to Wegener’s hypothesis of continental drift, the continents had once been joined to form a single supercontinent. • He called this supercontinent Pangaea, meaning all land. • Wegener believed that about 200 million years ago Pangaea began breaking into smaller continents. Fossil evidence ...
6 Metamorphic Rocks
... Figure 6.1B shows a more detailed view of metamorphic rocks.The alteration and deformation of the rock are evident in the alternating layers of light and dark minerals.These rocks were intensely sheared along almost horizontal planes while it was in a plastic or semiplastic state. The degree of plas ...
... Figure 6.1B shows a more detailed view of metamorphic rocks.The alteration and deformation of the rock are evident in the alternating layers of light and dark minerals.These rocks were intensely sheared along almost horizontal planes while it was in a plastic or semiplastic state. The degree of plas ...
SUPERPUZZLE
... the Arctic. It means lands bordering the northern oceans, so dubbed for the supercontinent’s Arcticfringing components. But some researchers prefer to call it Columbia after the Columbia region of North America’s Pacific Northwest. Whatever its moniker, Nuna/Columbia is an exercise in trying to get ...
... the Arctic. It means lands bordering the northern oceans, so dubbed for the supercontinent’s Arcticfringing components. But some researchers prefer to call it Columbia after the Columbia region of North America’s Pacific Northwest. Whatever its moniker, Nuna/Columbia is an exercise in trying to get ...
CHAPTER 3CPLATE TECTONICS
... 2. Stress is the amount of force per unit area applied to an object. Strain is the deformation resulting from the applied stress. Rocks may undergo elastic deformation, plastic deformation, and finally rupture with increasing stress. Brittle rocks rupture prior to any plastic deformation. 3. The lit ...
... 2. Stress is the amount of force per unit area applied to an object. Strain is the deformation resulting from the applied stress. Rocks may undergo elastic deformation, plastic deformation, and finally rupture with increasing stress. Brittle rocks rupture prior to any plastic deformation. 3. The lit ...
Marine environments - LSU Geology & Geophysics
... but it must be used with caution because the same geometry may be found in more than one environment can be modified by sediment compaction during lithification and by erosion and deformation ...
... but it must be used with caution because the same geometry may be found in more than one environment can be modified by sediment compaction during lithification and by erosion and deformation ...
Geology 12 - Mr. Gauthier
... (d) none of these 92. Stream erosion and deposition is mainly controlled by its: (a) discharge (b) gradient (c) water velocity (d) all of the above 93. A small stream that flows into a larger one is called a(n): (a) distributaries (b) tributary (c) meander (d) oxbow lake 94. A small stream that leav ...
... (d) none of these 92. Stream erosion and deposition is mainly controlled by its: (a) discharge (b) gradient (c) water velocity (d) all of the above 93. A small stream that flows into a larger one is called a(n): (a) distributaries (b) tributary (c) meander (d) oxbow lake 94. A small stream that leav ...
Earthquakes
... is the footwall and which is the hanging wall. Then you determine the relative motion between the hanging wall and footwall. Every fault tilted from the vertical has a hanging wall and footwall. To determine which is which, visualize yourself creating a mine in along the fault plane. The block below ...
... is the footwall and which is the hanging wall. Then you determine the relative motion between the hanging wall and footwall. Every fault tilted from the vertical has a hanging wall and footwall. To determine which is which, visualize yourself creating a mine in along the fault plane. The block below ...
Uranium in magmatic processes
... The geochemistry of this element in igneous rocks is strongly coherent with that of Th and LREE. In hydrothermal and supergene processes, however, uranium is partially or totally oxidized to U6+, and does not bear any coherence with the above elements. ...
... The geochemistry of this element in igneous rocks is strongly coherent with that of Th and LREE. In hydrothermal and supergene processes, however, uranium is partially or totally oxidized to U6+, and does not bear any coherence with the above elements. ...
Weathering Notes
... Hydraulic abrasion- ____________ & _______________ flowing over boulders (like in rivers with rapids.) ...
... Hydraulic abrasion- ____________ & _______________ flowing over boulders (like in rivers with rapids.) ...
Where the African plate and the South American plate meet is:
... The plates are pulled apart by convection currents in the mantle below. Caused by heat released from natural ______________________. Characteristics: Volcanoes: Gentle (basalt). Mostly under ocean or in rift zones. Earthquakes are shallow Convergent: Plates moving towards each other. Three types: ...
... The plates are pulled apart by convection currents in the mantle below. Caused by heat released from natural ______________________. Characteristics: Volcanoes: Gentle (basalt). Mostly under ocean or in rift zones. Earthquakes are shallow Convergent: Plates moving towards each other. Three types: ...
Introduction to Metamorphism
... – Metamorphic pattern is simpler than the structural one • Pattern of increasing metamorphic grade from both directions toward the core area • Most orogenic belts have several episodes of deformation and metamorphism, creating a more complex polymetamorphic pattern • Associated with continental coll ...
... – Metamorphic pattern is simpler than the structural one • Pattern of increasing metamorphic grade from both directions toward the core area • Most orogenic belts have several episodes of deformation and metamorphism, creating a more complex polymetamorphic pattern • Associated with continental coll ...
Boundaries, Stresses, and Faults OH MY!
... Zones as denser oceanic plate dives under less dense continental plate. ...
... Zones as denser oceanic plate dives under less dense continental plate. ...
Chapter 21: Metamorphism
... – Metamorphic pattern is simpler than the structural one • Pattern of increasing metamorphic grade from both directions toward the core area • Most orogenic belts have several episodes of deformation and metamorphism, creating a more complex polymetamorphic pattern • Associated with continental coll ...
... – Metamorphic pattern is simpler than the structural one • Pattern of increasing metamorphic grade from both directions toward the core area • Most orogenic belts have several episodes of deformation and metamorphism, creating a more complex polymetamorphic pattern • Associated with continental coll ...
Research Article
... are divided into sheet-like bodies (e.g. Gamano granodiorite) and stock-like bodies. The Gamano granodiorite intruded concordantly into the high-grade metamorphic rocks without development of a contact metamorphic aureole, and the intrusion ages of the granodiorite are similar to the ages of thermal ...
... are divided into sheet-like bodies (e.g. Gamano granodiorite) and stock-like bodies. The Gamano granodiorite intruded concordantly into the high-grade metamorphic rocks without development of a contact metamorphic aureole, and the intrusion ages of the granodiorite are similar to the ages of thermal ...
EGU2017-9223
... (1) Nature Research Center, Vilnius, Lithuania (juniorlaurynas@gmail.com), (2) Nature Research Center, Vilnius, Lithuania (skridlaite@geo.lt), (3) Nature Research Center, Vilnius, Lithuania (sabinaprus@gmail.com) ...
... (1) Nature Research Center, Vilnius, Lithuania (juniorlaurynas@gmail.com), (2) Nature Research Center, Vilnius, Lithuania (skridlaite@geo.lt), (3) Nature Research Center, Vilnius, Lithuania (sabinaprus@gmail.com) ...
Powerpoint Presentation Physical Geology, 10/e
... Features of the Sea Floor • Passive continental margins have a continental shelf, continental slope, and continental rise descending to the abyssal plain • Active continental margins have continental shelves and slopes, but the slope extends down into a deep oceanic trench • A mid-oceanic ridge sys ...
... Features of the Sea Floor • Passive continental margins have a continental shelf, continental slope, and continental rise descending to the abyssal plain • Active continental margins have continental shelves and slopes, but the slope extends down into a deep oceanic trench • A mid-oceanic ridge sys ...
Processes of the Rock Cycle
... plates move apart. p rock also forms where p • Rocks near colliding plates are often exposed to high pressure pressure, which causes them to undergo metamorphism. • When plates collide, one plate can get pushed deep below earth’s surface, where the rock melts and becomes magma; in time it is likely ...
... plates move apart. p rock also forms where p • Rocks near colliding plates are often exposed to high pressure pressure, which causes them to undergo metamorphism. • When plates collide, one plate can get pushed deep below earth’s surface, where the rock melts and becomes magma; in time it is likely ...
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.