chpt 17 continental drift
... few hundred kilometers out into the ocean that there must be a trench. ...
... few hundred kilometers out into the ocean that there must be a trench. ...
The Layers of the Earth PPT
... * Lithosphere- rigid outer layer (crust and very top of mantle); sits on top of asthenosphere * Asthenosphere- solid rock that flows slowly (like hot asphalt) in the upper & middle part of the mantle * Mesosphere- middle layer – lower mantle rock that is hotter but harder than asthenosphere * Outer ...
... * Lithosphere- rigid outer layer (crust and very top of mantle); sits on top of asthenosphere * Asthenosphere- solid rock that flows slowly (like hot asphalt) in the upper & middle part of the mantle * Mesosphere- middle layer – lower mantle rock that is hotter but harder than asthenosphere * Outer ...
Wegener - Course World
... a relatively iron-rich and heavy rock, tend to sink deeper in the mantle. Continental plates, being composed of granite, which is relatively light, tend to "float" and rise above the oceanic plates. Continental plates also tend to be thicker (up to 100 km) to balance their height (i.e. mountains), w ...
... a relatively iron-rich and heavy rock, tend to sink deeper in the mantle. Continental plates, being composed of granite, which is relatively light, tend to "float" and rise above the oceanic plates. Continental plates also tend to be thicker (up to 100 km) to balance their height (i.e. mountains), w ...
Lancaster_Gold15 - Portsmouth Research Portal
... Archaean cratons provide a critical window into early Earth dynamics, preserving a record of crustal evolution processes that include the start of ‘modern’ plate tectonics and the development of supercontinents. However, these same processes can also destroy or rework substantial volumes of crust, a ...
... Archaean cratons provide a critical window into early Earth dynamics, preserving a record of crustal evolution processes that include the start of ‘modern’ plate tectonics and the development of supercontinents. However, these same processes can also destroy or rework substantial volumes of crust, a ...
Lithospheric Controls on the Porphyry Cu-Au
... Cu(-Au-Mo) ore deposits. Notwithstanding the important role played by uplift and erosion in shaping their spatial distribution, the parochialism of the host magmatic rocks reflects a differential mantle-lithosphere coupling, as well as complex accretionary histories along the southern Eurasian margi ...
... Cu(-Au-Mo) ore deposits. Notwithstanding the important role played by uplift and erosion in shaping their spatial distribution, the parochialism of the host magmatic rocks reflects a differential mantle-lithosphere coupling, as well as complex accretionary histories along the southern Eurasian margi ...
lava
... 1. Igneous Rocks (Fact: Igneous means “fiery”) a. How they form: When magma reaches the surface, it becomes lava. b. This hot, molten rock cools and hardens to form igneous rock. c. Characteristics: Igneous rocks vary in size, shape, color, and texture. Examples: basalt, pumice, obsidian ...
... 1. Igneous Rocks (Fact: Igneous means “fiery”) a. How they form: When magma reaches the surface, it becomes lava. b. This hot, molten rock cools and hardens to form igneous rock. c. Characteristics: Igneous rocks vary in size, shape, color, and texture. Examples: basalt, pumice, obsidian ...
Convergent plate boundaries
... sink? The dense, leading edge of the oceanic plate actually pulls the rest of the plate into the flowing asthenosphere and a subduction zone is born! Where the two plates intersect, a deep trench forms. Geologists aren’t sure how deep the oceanic plate sinks before it completely melts, but we do kno ...
... sink? The dense, leading edge of the oceanic plate actually pulls the rest of the plate into the flowing asthenosphere and a subduction zone is born! Where the two plates intersect, a deep trench forms. Geologists aren’t sure how deep the oceanic plate sinks before it completely melts, but we do kno ...
Earth Structures
... Earthquake: the violent shaking of Earth’s crust as built up energy is released. Epicenter: point on Earth’s surface directly above the focus of an earthquake Fault: crack in Earth’s crust along which movement takes place ...
... Earthquake: the violent shaking of Earth’s crust as built up energy is released. Epicenter: point on Earth’s surface directly above the focus of an earthquake Fault: crack in Earth’s crust along which movement takes place ...
The Haiti Earthquake
... The Haiti Earthquake A shifting of the tectonic plates beneath the city of Léogâne, some 15 kilometres south-west of Port-au-Prince, the capital of Haiti, on January 12th 2010 caused a severe earthquake, magnitude 7.2 on the Richter Scale. The island of Haiti sits on the northern edge of one of the ...
... The Haiti Earthquake A shifting of the tectonic plates beneath the city of Léogâne, some 15 kilometres south-west of Port-au-Prince, the capital of Haiti, on January 12th 2010 caused a severe earthquake, magnitude 7.2 on the Richter Scale. The island of Haiti sits on the northern edge of one of the ...
LAB 3: TEXTURES AND IDENTIFICATION OF IGNEOUS ROCKS 1
... fine-grained or aphanitic material ( the groundmass). Porphyritic textures are common in volcanic rocks, but are occasionally found in plutonic rocks. glassy texture indicates very quick cooling at the earth's surface–– so quick that no crystals had a chance to form. vesicular textures are ones with ...
... fine-grained or aphanitic material ( the groundmass). Porphyritic textures are common in volcanic rocks, but are occasionally found in plutonic rocks. glassy texture indicates very quick cooling at the earth's surface–– so quick that no crystals had a chance to form. vesicular textures are ones with ...
Research Activities: Jer-Ming Chiu
... in various regions around the world including the central Arkansas (1984-1986), Argentina (1986-1989), the New Madrid region of central US (1989-1992), Hawaii island (1993), North Island of New Zealand (1993-1995), and central eastern and southern Taiwan (1995-1997). Recently, Professor Chiu has foc ...
... in various regions around the world including the central Arkansas (1984-1986), Argentina (1986-1989), the New Madrid region of central US (1989-1992), Hawaii island (1993), North Island of New Zealand (1993-1995), and central eastern and southern Taiwan (1995-1997). Recently, Professor Chiu has foc ...
Marine Chapter 3, Death by firey doom of eternal
... 17. What was the first evidence that suggested the 8. Why is biosynthesis unlikely to occur today as it Earth's crust might be broken into pieces? did in Earth's youth? a. Plotting of deep earthquakes in the Pacific Ring a. There is less available oxygen in the atmosphere of Fire b. Radiometric dati ...
... 17. What was the first evidence that suggested the 8. Why is biosynthesis unlikely to occur today as it Earth's crust might be broken into pieces? did in Earth's youth? a. Plotting of deep earthquakes in the Pacific Ring a. There is less available oxygen in the atmosphere of Fire b. Radiometric dati ...
Hot Spots and Plate Movement exercise
... Two good examples of present-day hot spot volcanism, as derived from mantle plumes beneath crustal plates, are Kilauea, Hawaii (on the Pacific oceanic plate) and Yellowstone (on the continental North American plate). These hot spots have produced a chain of inactive volcanic islands or seamounts on ...
... Two good examples of present-day hot spot volcanism, as derived from mantle plumes beneath crustal plates, are Kilauea, Hawaii (on the Pacific oceanic plate) and Yellowstone (on the continental North American plate). These hot spots have produced a chain of inactive volcanic islands or seamounts on ...
Plates Move
... The magma eventually hardens The magma could have risen so high that it peaks out of the water More islands will form in an arc, this shows how the plate is moving EX: Hawaii ...
... The magma eventually hardens The magma could have risen so high that it peaks out of the water More islands will form in an arc, this shows how the plate is moving EX: Hawaii ...
Cracking Up
... An ocean will one day fill the Great Rift Valley, where Africa is pulling apart. Recently, that tectonic activity has gotten dramatic. In 2005, the cracking of the African Plate triggered a volcanic eruption in Ethiopia. That was followed by a series of earthquakes—the same ones the nomads felt. The ...
... An ocean will one day fill the Great Rift Valley, where Africa is pulling apart. Recently, that tectonic activity has gotten dramatic. In 2005, the cracking of the African Plate triggered a volcanic eruption in Ethiopia. That was followed by a series of earthquakes—the same ones the nomads felt. The ...
Earth Systems Quick Study Card
... Make a table and label geologic formations that form from convergent plate boundaries for the following type of subduction zones: oceanic crust- oceanic crust; oceanic crust – continental crust; and continental crust – continental crust. Give at least 1 specific land form that has arisen from each. ...
... Make a table and label geologic formations that form from convergent plate boundaries for the following type of subduction zones: oceanic crust- oceanic crust; oceanic crust – continental crust; and continental crust – continental crust. Give at least 1 specific land form that has arisen from each. ...
Petrology Lecture 8
... Pb Is Quite Scarce in the Mantle • Mantle-derived melts are susceptible to contamination from UTh-Pb-rich reservoirs which can add a significant proportion to the total Pb • U, Pb, and Th are concentrated in sialic reservoirs, such as the continental crust, which develop high concentrations of the ...
... Pb Is Quite Scarce in the Mantle • Mantle-derived melts are susceptible to contamination from UTh-Pb-rich reservoirs which can add a significant proportion to the total Pb • U, Pb, and Th are concentrated in sialic reservoirs, such as the continental crust, which develop high concentrations of the ...
PPT
... Formation of Earth Ages of meteorites range from 4.53 to 4.58 b.y. old. These ages are the minimum age for formation of the solar system. This is likely close to the maximum age as well. protostar rocky volatile ...
... Formation of Earth Ages of meteorites range from 4.53 to 4.58 b.y. old. These ages are the minimum age for formation of the solar system. This is likely close to the maximum age as well. protostar rocky volatile ...
Tectonic Landforms
... • Where the edge of the subducting plate is curved in shape (the Pacific Plate) = The islands form an arc. ...
... • Where the edge of the subducting plate is curved in shape (the Pacific Plate) = The islands form an arc. ...
Venus Surface Geochemistry
... • Venus basalts comparable to primitive Earth MORBs (Midocean ridge basalts): comparable mantles ...
... • Venus basalts comparable to primitive Earth MORBs (Midocean ridge basalts): comparable mantles ...
Assessment 3.2 – Plate Tectonics
... 2. Any one of the internally rigid crustal blocks of the lithosphere which move horizontally across the Earth’s surface relative to one another is known as a. Tectonic Plates b. Asthenosphere c. Outer Core d. Inner Core 3. Tectonic plates that are not moving directly toward or directly away from eac ...
... 2. Any one of the internally rigid crustal blocks of the lithosphere which move horizontally across the Earth’s surface relative to one another is known as a. Tectonic Plates b. Asthenosphere c. Outer Core d. Inner Core 3. Tectonic plates that are not moving directly toward or directly away from eac ...
Large igneous province
A large igneous province (LIP) is an extremely large accumulation of igneous rocks, including liquid rock (intrusive) or volcanic rock formations (extrusive), when hot magma extrudes from inside the Earth and flows out. The source of many or all LIPs is variously attributed to mantle plumes or to processes associated with plate tectonics. Types of LIPs can include large volcanic provinces (LVP), created through flood basalt and large plutonic provinces (LPP). Eleven distinct flood basalt episodes occurred in the past 250 million years, creating volcanic provinces, which coincided with mass extinctions in prehistoric times. Formation depends on a range of factors, such as continental configuration, latitude, volume, rate, duration of eruption, style and setting (continental vs. oceanic), the preexisting climate state, and the biota resilience to change.