CV OJagoutz_May_2014 - Massachusetts Institute of Technology
... “The formation of the continental crust in arcs: a perspective from the lower arc crust” Lamont-Doherty Earth Observatory, Palisades, NY “How is continental crust formed in arcs?” Department of Earth Sciences, University of Southern California, CA “The 4D Evolution of the Kohistan-Ladakh Arc Batholi ...
... “The formation of the continental crust in arcs: a perspective from the lower arc crust” Lamont-Doherty Earth Observatory, Palisades, NY “How is continental crust formed in arcs?” Department of Earth Sciences, University of Southern California, CA “The 4D Evolution of the Kohistan-Ladakh Arc Batholi ...
The fate of continental fragments during subduction at high
... The behaviour of the continental crust subducted to high pressure (HP) conditions remains generally poorly known. Where continental HP-fragments are exhumed back to the surface, they provide insight into the processes occurring at convergent margins. This study is focussed on the central Sesia Zone, ...
... The behaviour of the continental crust subducted to high pressure (HP) conditions remains generally poorly known. Where continental HP-fragments are exhumed back to the surface, they provide insight into the processes occurring at convergent margins. This study is focussed on the central Sesia Zone, ...
Quiz - SLH PD Earthquakes
... A fault is a fracture in the Earth’s crust where the rock mass on either side has been displaced. Earthquakes occur on active fault lines. Inside the Earth We believe the Earth is divided into layers comprised of the crust, upper mantle, mantle and outer and inner core. This model explains the Earth ...
... A fault is a fracture in the Earth’s crust where the rock mass on either side has been displaced. Earthquakes occur on active fault lines. Inside the Earth We believe the Earth is divided into layers comprised of the crust, upper mantle, mantle and outer and inner core. This model explains the Earth ...
C:\Users\jmhemzac\Desktop\2017 spring\121 final rev S17f.wpd
... Be able to describe contributions from two energy sources for our dynamic earth: which earth processes (e.g., climate, water cycle, weathering; plate tectonics) are driven by internal vs. external energy? Be able to name and describe the layers of the earth with respect to physical behavior and with ...
... Be able to describe contributions from two energy sources for our dynamic earth: which earth processes (e.g., climate, water cycle, weathering; plate tectonics) are driven by internal vs. external energy? Be able to name and describe the layers of the earth with respect to physical behavior and with ...
How do we recognize plate boundaries? Step 1: Open Web GIS
... Instruct students to click different locations south of the North American plate, below the blue study box, where they think there may be a different plate. You may want to model this by clicking a location in the Caribbean Sea. This will pop-up a box that says “Caribbean Plate”, and you can show st ...
... Instruct students to click different locations south of the North American plate, below the blue study box, where they think there may be a different plate. You may want to model this by clicking a location in the Caribbean Sea. This will pop-up a box that says “Caribbean Plate”, and you can show st ...
tectonic models for the geological evolution of crust, cratons and
... b. Migrating or prograding arc-trench model (Hoffman 1991, Kimura et al. 1993, Jackson and Cruden 1995). Many oceanic or continental fragments were swept northwards and accreted on one subduction zone to create an extensive accretionary package. This mechanism requires that new arcs were developed o ...
... b. Migrating or prograding arc-trench model (Hoffman 1991, Kimura et al. 1993, Jackson and Cruden 1995). Many oceanic or continental fragments were swept northwards and accreted on one subduction zone to create an extensive accretionary package. This mechanism requires that new arcs were developed o ...
PLATE PUZZLES - Environmental Volunteers
... example. Usually a heavier oceanic plate moves under a lighter continental plate. Coastal mountain ranges and chains of island volcanoes often indicate that subduction has been at work. Collision action occurs over geologic time and is always continental. This type of movement has formed the Alps an ...
... example. Usually a heavier oceanic plate moves under a lighter continental plate. Coastal mountain ranges and chains of island volcanoes often indicate that subduction has been at work. Collision action occurs over geologic time and is always continental. This type of movement has formed the Alps an ...
9.5 Geology of Venus
... Thin seafloor crust differs from thick continental crust. Dating of the seafloor shows that it is usually quite young (200 million years). Continental crust much older (up to billions of years). © 2014 Pearson Education, Inc. ...
... Thin seafloor crust differs from thick continental crust. Dating of the seafloor shows that it is usually quite young (200 million years). Continental crust much older (up to billions of years). © 2014 Pearson Education, Inc. ...
Plate Tectonics: GL209 Prof. John Tarney Lecture 5: Subduction
... is initiated either as a result of frictional heating at the subduction zone, or more likely through fluids released from the dehydrating subducting slab. The rising diapir then splits the arc in two and the two halves are progressively separated by seafloor spreading: ...
... is initiated either as a result of frictional heating at the subduction zone, or more likely through fluids released from the dehydrating subducting slab. The rising diapir then splits the arc in two and the two halves are progressively separated by seafloor spreading: ...
1 NATURAL DISASTERS (GLY 125: 001, 002) Version #2 Exam # 1
... b. The lithosphere is denser than the mantle. c. The asthenosphere is the more rigid equivalent of the mantle. d. The asthenosphere is the more plastic part of the mantle. e. The mantle is everywhere more rigid than the crust. 14. Which of the following is true? a. Oceanic rift zones are found only ...
... b. The lithosphere is denser than the mantle. c. The asthenosphere is the more rigid equivalent of the mantle. d. The asthenosphere is the more plastic part of the mantle. e. The mantle is everywhere more rigid than the crust. 14. Which of the following is true? a. Oceanic rift zones are found only ...
Earthquakes
... slabs of crust slip past each other. Faults usually occur along plate boundaries, where the forces of plate motion compress, pull or shear the crust so much that the crust breaks. ...
... slabs of crust slip past each other. Faults usually occur along plate boundaries, where the forces of plate motion compress, pull or shear the crust so much that the crust breaks. ...
6 - Bal Bharati Public School
... The central core has very high temperature and pressure and hence it is not possible to reach the centre of the earth. Q5. What are the main mineral constituents of continental and oceanic mass? Continental mass – Silica and alumina. Oceanic mass – Silica and magnesia. Q6. What are Lithospheric plat ...
... The central core has very high temperature and pressure and hence it is not possible to reach the centre of the earth. Q5. What are the main mineral constituents of continental and oceanic mass? Continental mass – Silica and alumina. Oceanic mass – Silica and magnesia. Q6. What are Lithospheric plat ...
Morphology_of_Ocean_Basins
... The trench is about 2,550 kilometres long but has a mean width of only 69 kilometres. It reachess a maximum-known depth of about 10.91 km at he Challenger Deep, a small slot-shaped valley in its floor, at its southern end, although some unrepeated measurements place the deepest portion at 11.03 km.[ ...
... The trench is about 2,550 kilometres long but has a mean width of only 69 kilometres. It reachess a maximum-known depth of about 10.91 km at he Challenger Deep, a small slot-shaped valley in its floor, at its southern end, although some unrepeated measurements place the deepest portion at 11.03 km.[ ...
Geologic History - Teacher Friendly Guides
... crusts collide, there is nowhere for the crust to go but up! The modern Himalayas, at the collision site of the Asian and Indian plates, are a good example of very tall mountains formed by a collision between two continental crusts. ...
... crusts collide, there is nowhere for the crust to go but up! The modern Himalayas, at the collision site of the Asian and Indian plates, are a good example of very tall mountains formed by a collision between two continental crusts. ...
Explore Tectonic Motions of the Western United States with GPS
... Are the tectonic plates still moving? How do know? Let’s explore evidence of the plates moving using current data to see how the land beneath your feet is moving, crumpling, squishing, and stretching. In this activity, you will study the map on the Tectonics Motions of the Western United States post ...
... Are the tectonic plates still moving? How do know? Let’s explore evidence of the plates moving using current data to see how the land beneath your feet is moving, crumpling, squishing, and stretching. In this activity, you will study the map on the Tectonics Motions of the Western United States post ...
(Nyasa) Rift US Scientists Donna J. Shillingt
... System is an excellent locality to examine early-stage rifting at slow rates in strong, cold lithosphere. Only a small amount of stretching has occurred (<15%)[Ebinger, 1989], and extension is estimated to be proceeding relatively slowly at ~3.5 mm/yr [Stamps et al., 2008], but model constraints are ...
... System is an excellent locality to examine early-stage rifting at slow rates in strong, cold lithosphere. Only a small amount of stretching has occurred (<15%)[Ebinger, 1989], and extension is estimated to be proceeding relatively slowly at ~3.5 mm/yr [Stamps et al., 2008], but model constraints are ...
PNW Tectonic Block Model
... This activity has students use a "hands on" tectonic block model of the Pacific Northwest. The model consists of a tectonic map with moveable pieces that show the northward migration, clockwise rotation, and deformation of crustal blocks along the Cascadia convergent margin of the Northwestern US. T ...
... This activity has students use a "hands on" tectonic block model of the Pacific Northwest. The model consists of a tectonic map with moveable pieces that show the northward migration, clockwise rotation, and deformation of crustal blocks along the Cascadia convergent margin of the Northwestern US. T ...
On the apparent eastward migration of the spreading ridge in Iceland
... extension of the Tjornes fracture zone beyond the NVZ shows that the eastern center has been long-lived and has remained approximately fixed with respect to the Kolbeinsey ridge [Jancin et al., 1985; Saemundsson, 1979]. As a consequence of the fixed spatial relationship of the eastern spreading cent ...
... extension of the Tjornes fracture zone beyond the NVZ shows that the eastern center has been long-lived and has remained approximately fixed with respect to the Kolbeinsey ridge [Jancin et al., 1985; Saemundsson, 1979]. As a consequence of the fixed spatial relationship of the eastern spreading cent ...
Unit One - mswoodford
... There are a large number of different ways that humans respond to hazards posed by selected landforms and water forms. The case study on page 17 describes how humans respond to the threat of a volcanic eruption. They respond in this case by monitoring the volcano before eruption and by getting most ...
... There are a large number of different ways that humans respond to hazards posed by selected landforms and water forms. The case study on page 17 describes how humans respond to the threat of a volcanic eruption. They respond in this case by monitoring the volcano before eruption and by getting most ...
Deep crustal structure along the Niigata-Kobe Tectonic Zone, Japan:
... and Honkura (2004) detected a deep crustal conductor beneath the volcanic region at the west of the ISTL. These observations may suggest the existence of the magmatic fluids in the lower crust and uppermost mantle under a possible high temperature condition. It is inferred that the low-velocity anom ...
... and Honkura (2004) detected a deep crustal conductor beneath the volcanic region at the west of the ISTL. These observations may suggest the existence of the magmatic fluids in the lower crust and uppermost mantle under a possible high temperature condition. It is inferred that the low-velocity anom ...
Plate tectonics
Plate tectonics (from the Late Latin tectonicus, from the Greek: τεκτονικός ""pertaining to building"") is a scientific theory that describes the large-scale motion of Earth's lithosphere. This theoretical model builds on the concept of continental drift which was developed during the first few decades of the 20th century. The geoscientific community accepted the theory after the concepts of seafloor spreading were later developed in the late 1950s and early 1960s.The lithosphere, which is the rigid outermost shell of a planet (on Earth, the crust and upper mantle), is broken up into tectonic plates. On Earth, there are seven or eight major plates (depending on how they are defined) and many minor plates. Where plates meet, their relative motion determines the type of boundary; convergent, divergent, or transform. Earthquakes, volcanic activity, mountain-building, and oceanic trench formation occur along these plate boundaries. The lateral relative movement of the plates typically varies from zero to 100 mm annually.Tectonic plates are composed of oceanic lithosphere and thicker continental lithosphere, each topped by its own kind of crust. Along convergent boundaries, subduction carries plates into the mantle; the material lost is roughly balanced by the formation of new (oceanic) crust along divergent margins by seafloor spreading. In this way, the total surface of the globe remains the same. This prediction of plate tectonics is also referred to as the conveyor belt principle. Earlier theories (that still have some supporters) propose gradual shrinking (contraction) or gradual expansion of the globe.Tectonic plates are able to move because the Earth's lithosphere has greater strength than the underlying asthenosphere. Lateral density variations in the mantle result in convection. Plate movement is thought to be driven by a combination of the motion of the seafloor away from the spreading ridge (due to variations in topography and density of the crust, which result in differences in gravitational forces) and drag, with downward suction, at the subduction zones. Another explanation lies in the different forces generated by the rotation of the globe and the tidal forces of the Sun and Moon. The relative importance of each of these factors and their relationship to each other is unclear, and still the subject of much debate.