new geophysical data about the inner structure of drake passage crust
... distinguished on the side of Drake Passage. The source of this anomaly is a magnetoactive body with magnetization of +2,7 A·m־¹, which corresponds with the mean value of the positively magnetized blocks of the oceanic area of Passage. However, unlike them, this body is deep (6km) from the bottom s ...
... distinguished on the side of Drake Passage. The source of this anomaly is a magnetoactive body with magnetization of +2,7 A·m־¹, which corresponds with the mean value of the positively magnetized blocks of the oceanic area of Passage. However, unlike them, this body is deep (6km) from the bottom s ...
Collision of continental corner from 3
... similar to that of previous 2-D models (e.g., Gerya et al., 2008a; Li and Gerya, 2009; Li et al., 2011, 2012). In the continental domain, the initial material field incorporates a 35 km thick continental crust composed of 20 km upper crust and 15 km lower crust, resting on the 58 km lithospheric mant ...
... similar to that of previous 2-D models (e.g., Gerya et al., 2008a; Li and Gerya, 2009; Li et al., 2011, 2012). In the continental domain, the initial material field incorporates a 35 km thick continental crust composed of 20 km upper crust and 15 km lower crust, resting on the 58 km lithospheric mant ...
Far-reaching transient motions after Mojave
... Figure 2. (a) Weighted misfit as a function of the depth interval (defined by thin gray lines) at which viscoelastic flow is allowed to occur P (i.e. this is a composite of results from 12 models of flow at various depths). We quantify misfit (WSSR) as sqrt[(1/m) (do dc)2/s2], where do and dc are th ...
... Figure 2. (a) Weighted misfit as a function of the depth interval (defined by thin gray lines) at which viscoelastic flow is allowed to occur P (i.e. this is a composite of results from 12 models of flow at various depths). We quantify misfit (WSSR) as sqrt[(1/m) (do dc)2/s2], where do and dc are th ...
Igneous, Sedimentary and Metamorphic Rocks
... Subjacent mass Batholith > 100 km2 Stock < 100 km2 Injected mass Dike / Dyke Sill Laccolith Lopolith ...
... Subjacent mass Batholith > 100 km2 Stock < 100 km2 Injected mass Dike / Dyke Sill Laccolith Lopolith ...
An Overview of the Carlton Rhyolite Group: Cambrian A
... make up ≥30% of the total exposed rock volume. Some of these dikes may be Proterozoic in age (Denison, 1995; Lidiak et al., paper, this guidebook), but most are considered to have been emplaced during Cambrian rifting. Diabase intrusions typically occur in much smaller amounts in exposures of the Ca ...
... make up ≥30% of the total exposed rock volume. Some of these dikes may be Proterozoic in age (Denison, 1995; Lidiak et al., paper, this guidebook), but most are considered to have been emplaced during Cambrian rifting. Diabase intrusions typically occur in much smaller amounts in exposures of the Ca ...
Planets Notes 5 - 1 Notes 5: Planetary Interiors 5.1 Layers The
... This also brings up another problem that we have to deal with. The extreme conditions in the cores of planets put us into realms of physical laws that are not well defined. It is not easy to duplicate the conditions inside of a planet’s interior in physics lab, after all pressures that are at the l ...
... This also brings up another problem that we have to deal with. The extreme conditions in the cores of planets put us into realms of physical laws that are not well defined. It is not easy to duplicate the conditions inside of a planet’s interior in physics lab, after all pressures that are at the l ...
Earthquakes - Earth Science
... The point where the rock first breaks is called the focus of an earthquake. The point directly above the focus on the Earth’s surface is the epicenter. After an earthquake event, smaller earthquakes called aftershocks often occur near the focus of the original earthquake. ...
... The point where the rock first breaks is called the focus of an earthquake. The point directly above the focus on the Earth’s surface is the epicenter. After an earthquake event, smaller earthquakes called aftershocks often occur near the focus of the original earthquake. ...
Pb composition of Mesozoic Pacific oceanic crust
... [1] We report Sr, Nd and Pb isotopic compositions of sediments and variably altered igneous rocks from ODP Site 801 (Marianas) and ODP Site 1149 (Izu-Bonin). These Sites provide the most complete drilled ocean crust sections located in front of the Mariana and Izu-Bonin trenches and characterize the ...
... [1] We report Sr, Nd and Pb isotopic compositions of sediments and variably altered igneous rocks from ODP Site 801 (Marianas) and ODP Site 1149 (Izu-Bonin). These Sites provide the most complete drilled ocean crust sections located in front of the Mariana and Izu-Bonin trenches and characterize the ...
Volcanoes - MrDanielASBSukMSSci
... volcanoes mountainous structure •A crater is the bowl-shaped area that can form around the top of the ...
... volcanoes mountainous structure •A crater is the bowl-shaped area that can form around the top of the ...
PDF - Asian Online Journal Publishing Group
... bodies around Aramoko, Ara and Ijero area and concluded that majority of the samples are lepidolite sub class while some pegmatite bodies may have undergone mild post magmatic alteration, especially those outcropping around Ijero area. Caby and Boesse [10] have also indicated the presence of nappes ...
... bodies around Aramoko, Ara and Ijero area and concluded that majority of the samples are lepidolite sub class while some pegmatite bodies may have undergone mild post magmatic alteration, especially those outcropping around Ijero area. Caby and Boesse [10] have also indicated the presence of nappes ...
Site Account
... equally well have been deposited from pyroclastic surges. The range of bed types, including massive, inversely graded, graded and parallel-laminated or cross-laminated tuffs, could all be associated with downcurrent changes in the flow characteristics and depositional mechanisms of pyroclastic curre ...
... equally well have been deposited from pyroclastic surges. The range of bed types, including massive, inversely graded, graded and parallel-laminated or cross-laminated tuffs, could all be associated with downcurrent changes in the flow characteristics and depositional mechanisms of pyroclastic curre ...
Foliations Part 2
... •Igneous rocks- important source of heat responsible for metamorphism •Age can be readily determined on plutons- geologic relationships between igneous rocks and tectonites can constrain the age of deformation ...
... •Igneous rocks- important source of heat responsible for metamorphism •Age can be readily determined on plutons- geologic relationships between igneous rocks and tectonites can constrain the age of deformation ...
Earth Hazards - Teacher Friendly Guides
... have significant impacts on human beings. Extreme weather conditions or geologic activity can cause substantial short-term or long-term changes to our environment. These changes can influence crops, homes, infrastructure, and the atmosphere. The 4.6-billion-year-old Earth has experienced many of the ...
... have significant impacts on human beings. Extreme weather conditions or geologic activity can cause substantial short-term or long-term changes to our environment. These changes can influence crops, homes, infrastructure, and the atmosphere. The 4.6-billion-year-old Earth has experienced many of the ...
Volcanoes Web Quest - Boone County Schools
... 5. How is Yellowstone different than the other volcanoes in the table above? Is it located on a hot spot or a boundary? Is it expected to erupt again soon? ...
... 5. How is Yellowstone different than the other volcanoes in the table above? Is it located on a hot spot or a boundary? Is it expected to erupt again soon? ...
GeoloGy y - Revista Pesquisa Fapesp
... professor, had identified a gravimetric anomaly. The gravitational field there is unusually high in Brazil for a plateau region with an average altitude of 300 to 400 meters. In these flat and relatively low lands—for example, there are no mountain ranges— there is no excess weight on the surface to ...
... professor, had identified a gravimetric anomaly. The gravitational field there is unusually high in Brazil for a plateau region with an average altitude of 300 to 400 meters. In these flat and relatively low lands—for example, there are no mountain ranges— there is no excess weight on the surface to ...
CHAPTER 19
... speeds, causing one plate to slide past the other. This movement in plates creates a — A normal fault B reverse fault C strike-slip fault D thrust fault ...
... speeds, causing one plate to slide past the other. This movement in plates creates a — A normal fault B reverse fault C strike-slip fault D thrust fault ...
Microsoft Word - NewTopographicMapsLab
... and sedimentary material are being shoved downward, toward the east, underneath North America. This down-going material undergoes metamorphism as it becomes exposed to progressively higher pressures and temperatures in the interior of the earth beneath North America. Temperatures at depths of the to ...
... and sedimentary material are being shoved downward, toward the east, underneath North America. This down-going material undergoes metamorphism as it becomes exposed to progressively higher pressures and temperatures in the interior of the earth beneath North America. Temperatures at depths of the to ...
Early Tibetan Plateau uplift history eludes
... with parts of the landscape responding to recent tectonic forcing, climate change, or drainage integration (e.g., Clark et al., 2005). These artifacts seem to be commonly preserved in active landscapes to greater or lesser degrees. Where base level can be determined, these planar landscape remnants ...
... with parts of the landscape responding to recent tectonic forcing, climate change, or drainage integration (e.g., Clark et al., 2005). These artifacts seem to be commonly preserved in active landscapes to greater or lesser degrees. Where base level can be determined, these planar landscape remnants ...
8-3.1 - S2TEM Centers SC
... the oceanic crust is more dense, it submerges below the lighter continental crust when the two collide. (Both types of crust ride on top of the solid lithosphere, which is considered part of the crust. The lithosphere then rides on top of the weaker, partially molten asthenosphere, which is part of ...
... the oceanic crust is more dense, it submerges below the lighter continental crust when the two collide. (Both types of crust ride on top of the solid lithosphere, which is considered part of the crust. The lithosphere then rides on top of the weaker, partially molten asthenosphere, which is part of ...
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.