EARTH QUAKES
... lithosphere, deformation is spread out over a much larger area than the plate boundary itself. In the case of the San Andreas fault continental transform, many earthquakes occur away from the plate boundary and are related to strains developed within the broader zone of deformation caused by major i ...
... lithosphere, deformation is spread out over a much larger area than the plate boundary itself. In the case of the San Andreas fault continental transform, many earthquakes occur away from the plate boundary and are related to strains developed within the broader zone of deformation caused by major i ...
kittitas valley field trip
... subduction zone, across what is now the southern half of the state. As these sections of displaced mélange rocks arrived at the subduction zone, they were obducted (thrust over) across the top of the continent along low-angle thrust faults. Some of these great “thrust sheets” may have been thrust fo ...
... subduction zone, across what is now the southern half of the state. As these sections of displaced mélange rocks arrived at the subduction zone, they were obducted (thrust over) across the top of the continent along low-angle thrust faults. Some of these great “thrust sheets” may have been thrust fo ...
Phase change in subducted lithosphere, impulse, and
... by solid-Earth scientists but included “static” forces, such as the weight of sinking plates. Hager and O’Connell (1981), Hager et al. (1985), and Ricard et al. (1993) inferred a triplet of mass anomalies by adding negative downward deflections of the ocean surface and at the core–mantle boundary be ...
... by solid-Earth scientists but included “static” forces, such as the weight of sinking plates. Hager and O’Connell (1981), Hager et al. (1985), and Ricard et al. (1993) inferred a triplet of mass anomalies by adding negative downward deflections of the ocean surface and at the core–mantle boundary be ...
Cordilleran foreland vs hinterland deformation: Thermal controls of
... of temperature. The consequent thicknesses for the lithosphere (i.e., depth of significant strength), are approximately defined by ~450oC for crustal and ~750oC for mantle compositions. The lithosphere thickness are only the upper ~15 km of the crust for the Cordillera west of the thermal boundary, ...
... of temperature. The consequent thicknesses for the lithosphere (i.e., depth of significant strength), are approximately defined by ~450oC for crustal and ~750oC for mantle compositions. The lithosphere thickness are only the upper ~15 km of the crust for the Cordillera west of the thermal boundary, ...
1 The role of the mantle wedge in subduction zone dynamics and
... differentiation into a basaltic crust overlying depleted peridotite. Interaction with seawater by hydrothermal circulation, potentially aided by deep fractures, and deposition of sediments derived from biogenic activity in the oceans and from continental erosion add to the chemical diversity. While ...
... differentiation into a basaltic crust overlying depleted peridotite. Interaction with seawater by hydrothermal circulation, potentially aided by deep fractures, and deposition of sediments derived from biogenic activity in the oceans and from continental erosion add to the chemical diversity. While ...
The Westward Drift of the Lithosphere: A rotational drag?
... shallower (80-250 km) depth (Gung et al., 2003). This anisotropy has been related to horizontal shear in the low-viscosity asthenospheric channel, which is thinner below the continents than beneath the oceans (Gung et al., 2003). This is in agreement with a shear in the asthenosphere distributed wor ...
... shallower (80-250 km) depth (Gung et al., 2003). This anisotropy has been related to horizontal shear in the low-viscosity asthenospheric channel, which is thinner below the continents than beneath the oceans (Gung et al., 2003). This is in agreement with a shear in the asthenosphere distributed wor ...
Intermediate-Depth Earthquakes in a Region of Continental
... The majority of earthquakes involve sudden brittle failure on preexisting planes of weakness during which the frictional sliding causes elastic waves to radiate (Scholz, 1990). For most intermediate-depth earthquakes (depths between 30 and 100 km), subduction zones provide the relatively cool, britt ...
... The majority of earthquakes involve sudden brittle failure on preexisting planes of weakness during which the frictional sliding causes elastic waves to radiate (Scholz, 1990). For most intermediate-depth earthquakes (depths between 30 and 100 km), subduction zones provide the relatively cool, britt ...
Magnetization properties of intrusive/extrusive rocks from East Maio
... part of the sedimentary pile the volcanism appears to have originated in a subaerial/shallow water environment (Stillman et al. 1982). In addition to this important geological information the relatively remote distance of the Cape Verde Archipelago from the West African continental platform places t ...
... part of the sedimentary pile the volcanism appears to have originated in a subaerial/shallow water environment (Stillman et al. 1982). In addition to this important geological information the relatively remote distance of the Cape Verde Archipelago from the West African continental platform places t ...
Chapter 6. The Shape of the Earth
... such features as continents and 1nidocean ridges. The geoid reflects temperature and density variations in the interior, but these are not simply related to the surface expressions of plate tectonics. The largest departures of the geoid from a radially symmetric rotating spheroid are the equatorial ...
... such features as continents and 1nidocean ridges. The geoid reflects temperature and density variations in the interior, but these are not simply related to the surface expressions of plate tectonics. The largest departures of the geoid from a radially symmetric rotating spheroid are the equatorial ...
Structure of the southern Jalisco subduction zone, Mexico, as
... earthquake indicates that the subducting slab has an initial dip of 10.2E”2.9E, which is consistent with earlier studies. The density of the upper layer increases to 3.5 g/cm3 within the subducting plate at a mantle depth of about 30 km. As under the Jalisco block, the upper mantle beneath the ocean ...
... earthquake indicates that the subducting slab has an initial dip of 10.2E”2.9E, which is consistent with earlier studies. The density of the upper layer increases to 3.5 g/cm3 within the subducting plate at a mantle depth of about 30 km. As under the Jalisco block, the upper mantle beneath the ocean ...
CTY Course Syllabus Dynamic Earth Day 1 Lesson/Lecture Topic
... Stanford, predicting earthquakes, subduction zone earthquakes, volcanic hazards, different types of volcanoes & their plate boundary setting, how SiO2 content effects lava viscosity and eruptions and volcano appearance, how human lives, life on earth in general and climate are affected by volcanic e ...
... Stanford, predicting earthquakes, subduction zone earthquakes, volcanic hazards, different types of volcanoes & their plate boundary setting, how SiO2 content effects lava viscosity and eruptions and volcano appearance, how human lives, life on earth in general and climate are affected by volcanic e ...
Rock On
... rock can change into a new kind of metamorphic rock. Rocks are constantly being formed, worn down and formed again. The process of rock changing is called the Rock Cycle. The rock cycle mean that rocks are recycled into something new. Some rocks have been around for more than 4 billion years. It can ...
... rock can change into a new kind of metamorphic rock. Rocks are constantly being formed, worn down and formed again. The process of rock changing is called the Rock Cycle. The rock cycle mean that rocks are recycled into something new. Some rocks have been around for more than 4 billion years. It can ...
Earth Space Science
... the biodiversity of underwater life and lower the resilience of marine systems. Nutrient pollution from farm and yard fertilizer runoff, sewage, and other land-based sources that contributes to overgrowth of algae, which in turn lead to fish kills and swimmer illness, and ocean "dead ...
... the biodiversity of underwater life and lower the resilience of marine systems. Nutrient pollution from farm and yard fertilizer runoff, sewage, and other land-based sources that contributes to overgrowth of algae, which in turn lead to fish kills and swimmer illness, and ocean "dead ...
EGU2017-5532 - CO Meeting Organizer
... Geophysical Research Abstracts Vol. 19, EGU2017-5532, 2017 EGU General Assembly 2017 © Author(s) 2017. CC Attribution 3.0 License. ...
... Geophysical Research Abstracts Vol. 19, EGU2017-5532, 2017 EGU General Assembly 2017 © Author(s) 2017. CC Attribution 3.0 License. ...
Geological summary of the Magdalena mining district, Socorro
... span after the Permian (see fig. 1 for distribution). The earlier period of intrusive activity is characterized by widespread intrusion into the Precambrian argillite by gabbro, felsite, granite and diabase, from oldest to youngest respectively as indicated by mutual relationships. All have been tru ...
... span after the Permian (see fig. 1 for distribution). The earlier period of intrusive activity is characterized by widespread intrusion into the Precambrian argillite by gabbro, felsite, granite and diabase, from oldest to youngest respectively as indicated by mutual relationships. All have been tru ...
Oceans
... • Isolated volcanic peaks (conical steep sided and hundred of meters high) • Many form near oceanic ridges and the greatest number found in the Pacific. • May emerge as an island • May sink and form flat-topped seamounts called guyots or tablemounts: Some of the volcanoes are eroded to near sea leve ...
... • Isolated volcanic peaks (conical steep sided and hundred of meters high) • Many form near oceanic ridges and the greatest number found in the Pacific. • May emerge as an island • May sink and form flat-topped seamounts called guyots or tablemounts: Some of the volcanoes are eroded to near sea leve ...
Historical Geology
... 1. geologic structure -- any feature produced by deformation of rocks 2. folds -- a bend in rock - limb--sides of a fold -fold axis—a line dividing the two limbs of a fold and running along the crest of an anticline or the trough of a syncline - plunge: when the axis in inclined or tipped at an angl ...
... 1. geologic structure -- any feature produced by deformation of rocks 2. folds -- a bend in rock - limb--sides of a fold -fold axis—a line dividing the two limbs of a fold and running along the crest of an anticline or the trough of a syncline - plunge: when the axis in inclined or tipped at an angl ...
Volcanoes - TEMSScience8
... Before you read, look at the section headings and visuals to see what this section is about. Then write what you know about volcanic eruptions in a graphic organizer like the one below. As you read, write what you learn. What You Know ...
... Before you read, look at the section headings and visuals to see what this section is about. Then write what you know about volcanic eruptions in a graphic organizer like the one below. As you read, write what you learn. What You Know ...
Volcanic Eruptions Volcanoes Landforms From Lava and Ash
... Before you read, look at the section headings and visuals to see what this section is about. Then write what you know about volcanic eruptions in a graphic organizer like the one below. As you read, write what you learn. What You Know ...
... Before you read, look at the section headings and visuals to see what this section is about. Then write what you know about volcanic eruptions in a graphic organizer like the one below. As you read, write what you learn. What You Know ...
Historical GEOLOGY OF ARIZONA with questions
... topographic high was created by uplift and allowed these materials to be eroded and deposited to the northern edge of the current border with Utah. South of the Mogollon Highlands, we see a band of sediments washed to the south, paralleling the southern highlands border. During the Cenozoic, we see ...
... topographic high was created by uplift and allowed these materials to be eroded and deposited to the northern edge of the current border with Utah. South of the Mogollon Highlands, we see a band of sediments washed to the south, paralleling the southern highlands border. During the Cenozoic, we see ...
Intra-arc extension in Central America: Links between plate motions
... and Nicaraguan segments of this volcanic arc have been a region of significant arc tectonic extension; extension arising from the interplay between subduction roll-back of the Cocos Plate and the ~ 10–15mm/yr slower westward drift of the Caribbean plate relative to the North American Plate. The ages ...
... and Nicaraguan segments of this volcanic arc have been a region of significant arc tectonic extension; extension arising from the interplay between subduction roll-back of the Cocos Plate and the ~ 10–15mm/yr slower westward drift of the Caribbean plate relative to the North American Plate. The ages ...
Faults
... Dissemination or sale of any part of this work (including on the World Wide Web) will destroy the integrity of the work and is not permitted. The work and materials from it should never be made available to students except by instructors using the accompanying text in their classes. All recipients o ...
... Dissemination or sale of any part of this work (including on the World Wide Web) will destroy the integrity of the work and is not permitted. The work and materials from it should never be made available to students except by instructors using the accompanying text in their classes. All recipients o ...
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.