Fundamental discoveries about the growth and recycling of continents
... scientific ocean drilling began to turn up evidence that, in fact, at deep-sea trenches ocean-floor sediment is injected into the underlying mantle by processes of sediment subduction, which were set in motion by the subsurface sinking or subduction of oceanic plates. This revelation was accompanied ...
... scientific ocean drilling began to turn up evidence that, in fact, at deep-sea trenches ocean-floor sediment is injected into the underlying mantle by processes of sediment subduction, which were set in motion by the subsurface sinking or subduction of oceanic plates. This revelation was accompanied ...
How Are Landforms Created and Changed Handout
... is a layer of semi-molten rock under the lithosphere. As it heats, it becomes less dense and ____________. It flows ______________. It is replaced _____________ by the flow of cooler semi-molten materials. This material heats up and then flows _____________. In turn, it is replaced. This creates a ...
... is a layer of semi-molten rock under the lithosphere. As it heats, it becomes less dense and ____________. It flows ______________. It is replaced _____________ by the flow of cooler semi-molten materials. This material heats up and then flows _____________. In turn, it is replaced. This creates a ...
Ch. 13 Seafloor Spreading
... He noticed that the rocks were younger near the mid-ocean ridge than the rocks closer to the continents. ...
... He noticed that the rocks were younger near the mid-ocean ridge than the rocks closer to the continents. ...
Chapter 8 Study Guide
... at converging boundaries. 42. The Himalayas where two continental plates are colliding is an example of a converging (collision) boundary and the Andes Mountains where an ocean plate is being pushed under a continental plate is an example of a converging (subduction) boundary, meaning the Andes moun ...
... at converging boundaries. 42. The Himalayas where two continental plates are colliding is an example of a converging (collision) boundary and the Andes Mountains where an ocean plate is being pushed under a continental plate is an example of a converging (subduction) boundary, meaning the Andes moun ...
SGES 1302 Lecture5
... As the subducting plate descends, its temperature rises driving off volatiles (most importantly water) trapped in the porous oceanic crust. As this water rises into the mantle of the overriding plate, it lowers the melting temperature of surrounding mantle, producing melts (magma) with large amounts ...
... As the subducting plate descends, its temperature rises driving off volatiles (most importantly water) trapped in the porous oceanic crust. As this water rises into the mantle of the overriding plate, it lowers the melting temperature of surrounding mantle, producing melts (magma) with large amounts ...
Internal Structure of the Earth
... center of the Earth • Extremely deep trenches are formed, and also chains of volcanic islands are created (island arcs) • The Japanese Islands are formed this way. ...
... center of the Earth • Extremely deep trenches are formed, and also chains of volcanic islands are created (island arcs) • The Japanese Islands are formed this way. ...
Plate Tectonics The Earth` crust is broken into various chunks called
... chunks called “plates” These plates do not stay in one place, this movement is referred to as “Plate Tectonics” The movement is caused by the convection currents in Earth's mantle. ...
... chunks called “plates” These plates do not stay in one place, this movement is referred to as “Plate Tectonics” The movement is caused by the convection currents in Earth's mantle. ...
Volcanoes and Plate Tectonics
... 2. The crust melts and forms magma, which rises back toward the surface. 3. When the magma from the melted crust erupts as lava, volcanoes are formed B. Many volcanoes occur on islands, near boundaries where two oceanic plates collide. 1. The older denser plate dives under the other plate, creating ...
... 2. The crust melts and forms magma, which rises back toward the surface. 3. When the magma from the melted crust erupts as lava, volcanoes are formed B. Many volcanoes occur on islands, near boundaries where two oceanic plates collide. 1. The older denser plate dives under the other plate, creating ...
Chapter 2: The Earth`s Mobile Crust Continental Drift
... Amero-Trailing Edge Coast South Shore Significant Wave Conditions: H ~= 1.5 m, T = 8 sec ...
... Amero-Trailing Edge Coast South Shore Significant Wave Conditions: H ~= 1.5 m, T = 8 sec ...
2 Review Plate Tectonics l
... Types of convergent boundaries: 2. Oceanic-oceanic convergence When two oceanic slabs converge, one descends beneath the other. Often forms volcanoes on the ocean floor above the subduction zone. If the volcanoes emerge as islands, a volcanic island arc is formed (Japan, Aleutian islands, Tonga isl ...
... Types of convergent boundaries: 2. Oceanic-oceanic convergence When two oceanic slabs converge, one descends beneath the other. Often forms volcanoes on the ocean floor above the subduction zone. If the volcanoes emerge as islands, a volcanic island arc is formed (Japan, Aleutian islands, Tonga isl ...
2017Geological Oceanography
... • AUVs are untethered robotic devices that are controlled and piloted by an onboard computer. • Some are propelled by motor and some are propelled by utilizing different densities of water in the water column (Glider style). • AUVs are untethered. They operate completely independently. Transmit data ...
... • AUVs are untethered robotic devices that are controlled and piloted by an onboard computer. • Some are propelled by motor and some are propelled by utilizing different densities of water in the water column (Glider style). • AUVs are untethered. They operate completely independently. Transmit data ...
Student Notes
... -Seismic waves- vibrations in the Earth that can tell us a great deal about the _________ _____________________2. Describe the two types of seismic waves below: -P Wave- primary waves or compressional waves, __________________, travel through solids, liquids and gases S-Wave- secondary waves or shea ...
... -Seismic waves- vibrations in the Earth that can tell us a great deal about the _________ _____________________2. Describe the two types of seismic waves below: -P Wave- primary waves or compressional waves, __________________, travel through solids, liquids and gases S-Wave- secondary waves or shea ...
Plate Tectonics 2
... plate slides downhill from the ridge toward the subduction zone (ridge is high standing because it is hot and heat makes solids expand) ...
... plate slides downhill from the ridge toward the subduction zone (ridge is high standing because it is hot and heat makes solids expand) ...
Plate Tectonics Notes plate_boundaries
... When a continental plate collides with another continental plate ...
... When a continental plate collides with another continental plate ...
exam_1
... 32. Which of the following is NOT true about passive continental margins? A. They have little seismic or volcanic activity. B. They form after continents are rifted apart. C. They tend to be wider than active margins. D. They occur away from plate boundaries. E. They are commonly at subduction zones ...
... 32. Which of the following is NOT true about passive continental margins? A. They have little seismic or volcanic activity. B. They form after continents are rifted apart. C. They tend to be wider than active margins. D. They occur away from plate boundaries. E. They are commonly at subduction zones ...
Test 4 - GEOCITIES.ws
... 42. In the figure shown, the pattern of blue, yellow, and red, such as on the west coast of South America, indicates (a) the increasing depth of earthquakes beneath a continent (b) the decreasing depth of earthquakes beneath a continent (c) the locations of volcanoes (d) the locations of trenches 43. ...
... 42. In the figure shown, the pattern of blue, yellow, and red, such as on the west coast of South America, indicates (a) the increasing depth of earthquakes beneath a continent (b) the decreasing depth of earthquakes beneath a continent (c) the locations of volcanoes (d) the locations of trenches 43. ...
Plate Tectonics 2
... Lateral drag along plate edges (like the San Andreas Fault): one plate pulls the other along Drag on the bottom of plates usually resists plate movement ...
... Lateral drag along plate edges (like the San Andreas Fault): one plate pulls the other along Drag on the bottom of plates usually resists plate movement ...
idea proposed by Alfred Wegener that the continents started as one
... Fossil records match the diagram of pangea Similar mountain range composition Similar mineral make-up fit diagram of pangea. ...
... Fossil records match the diagram of pangea Similar mountain range composition Similar mineral make-up fit diagram of pangea. ...
For the Student
... It seems that the more we know about the earth, the more questions we have. It is difficult to visualize a three dimensional earth on two-dimensional paper. In this activity, you will construct a three dimensional model of part of the earth’s surface. Recall that scientists now think that the earth’ ...
... It seems that the more we know about the earth, the more questions we have. It is difficult to visualize a three dimensional earth on two-dimensional paper. In this activity, you will construct a three dimensional model of part of the earth’s surface. Recall that scientists now think that the earth’ ...
File - Flipped Out Science with Mrs. Thomas!
... He could not identify the force that moves the tectonic plates ...
... He could not identify the force that moves the tectonic plates ...
Oceanic trench
The oceanic trenches are hemispheric-scale long but narrow topographic depressions of the sea floor. They are also the deepest parts of the ocean floor. Oceanic trenches are a distinctive morphological feature of convergent plate boundaries, along which lithospheric plates move towards each other at rates that vary from a few mm to over ten cm per year. A trench marks the position at which the flexed, subducting slab begins to descend beneath another lithospheric slab. Trenches are generally parallel to a volcanic island arc, and about 200 km (120 mi) from a volcanic arc. Oceanic trenches typically extend 3 to 4 km (1.9 to 2.5 mi) below the level of the surrounding oceanic floor. The greatest ocean depth to be sounded is in the Challenger Deep of the Mariana Trench, at a depth of 11,034 m (36,201 ft) below sea level. Oceanic lithosphere moves into trenches at a global rate of about 3 km2/yr.