Name - Cedar Hill ISD
... 18. The proof that plates were moving was discovered when sonar technology discovered the mid ocean ridge. What is the mid ocean ridge? 19. Where is the longest chain of mountains in the world? 20. What is happening at the mid ocean ridge? 21. Where are the youngest rocks in the ocean found? 22. Whe ...
... 18. The proof that plates were moving was discovered when sonar technology discovered the mid ocean ridge. What is the mid ocean ridge? 19. Where is the longest chain of mountains in the world? 20. What is happening at the mid ocean ridge? 21. Where are the youngest rocks in the ocean found? 22. Whe ...
Indirect evidence
... 7. Pressure increases the deeper you go because there is more and more weight on top. If you go down one mile, there is a mile of rock above pushing down. ...
... 7. Pressure increases the deeper you go because there is more and more weight on top. If you go down one mile, there is a mile of rock above pushing down. ...
The Lithosphere - Westmount High School
... Wilson, a Canadian geophysicist, developed the idea of plate tectonics. Once scientists had discovered that the upper mantle, the asthenosphere, was composed of partially melted rock, Wilson realized that the continents could move because they were “floating” on a mud-like substance. Plate tectonics ...
... Wilson, a Canadian geophysicist, developed the idea of plate tectonics. Once scientists had discovered that the upper mantle, the asthenosphere, was composed of partially melted rock, Wilson realized that the continents could move because they were “floating” on a mud-like substance. Plate tectonics ...
Lecture 45 - Earth and Atmospheric Sciences
... In the deepest mantle, another significant phase change occurs, which may partly account for the seismic properties of the lowermost ~200 km, called D’’. At present, seismic data are consistent with a radially uniform mantle composition with variation in seismic velocity resulting from selfcompressi ...
... In the deepest mantle, another significant phase change occurs, which may partly account for the seismic properties of the lowermost ~200 km, called D’’. At present, seismic data are consistent with a radially uniform mantle composition with variation in seismic velocity resulting from selfcompressi ...
Slide 1
... a. continents were once joined b. the Earth was about 6000 years old c. there was no evidence to suggest that the Earth was changing d. all rocks on Earth were of the same age ...
... a. continents were once joined b. the Earth was about 6000 years old c. there was no evidence to suggest that the Earth was changing d. all rocks on Earth were of the same age ...
Mantle plumes: Why the current skepticism?
... Plausible temperature variations in the deep mantle may then cause density variations that are smaller than those across the chemical interfaces, hindering or precluding the rising of warmed material from the deep mantle. These variations in physical properties within the Earth suggest that in the u ...
... Plausible temperature variations in the deep mantle may then cause density variations that are smaller than those across the chemical interfaces, hindering or precluding the rising of warmed material from the deep mantle. These variations in physical properties within the Earth suggest that in the u ...
3 Types of heat transfer 2. Conduction
... transfer of heat through large scale fluid flow. flow caused by density differences due to temperature differences ...
... transfer of heat through large scale fluid flow. flow caused by density differences due to temperature differences ...
Earth`s Internal Structure Earth`s Layered Structure In the preceding
... Earth’s Layered Structure In the preceding section, you learned that the segregation of material that began early inEarth’s history resulted in the formation of three layers defined by their chemical composition—the crust, mantle, and core. In addition to these compositionally distinct layers, Earth ...
... Earth’s Layered Structure In the preceding section, you learned that the segregation of material that began early inEarth’s history resulted in the formation of three layers defined by their chemical composition—the crust, mantle, and core. In addition to these compositionally distinct layers, Earth ...
ES Ch 3 Test
... Continental Drift, Sea-Floor Spreading, Deep-Ocean Trench, Plates, Rift Valley, Mid-Ocean Ridge, Trench 11. The hypothesis of _________________________ was that all the continents once were joined as a single supercontinent and have since drifted apart. 12. The process of _________________________ c ...
... Continental Drift, Sea-Floor Spreading, Deep-Ocean Trench, Plates, Rift Valley, Mid-Ocean Ridge, Trench 11. The hypothesis of _________________________ was that all the continents once were joined as a single supercontinent and have since drifted apart. 12. The process of _________________________ c ...
GG 101, Spring 2006 Name_________________________ Exam 2
... 2. How could you use P and S seismic waves to find a chamber of molten magma in the earth’s crust? (5 points) Because P-waves travel more slowly through liquids than through solids and S-waves are absorbed by liquids, one could generate seismic waves of both types and search for areas below the surf ...
... 2. How could you use P and S seismic waves to find a chamber of molten magma in the earth’s crust? (5 points) Because P-waves travel more slowly through liquids than through solids and S-waves are absorbed by liquids, one could generate seismic waves of both types and search for areas below the surf ...
Plate Tectonics
... New bathymetric measurements define the continental crust boundary. Do South America and Africa still fit together? If crust is being created at mid-ocean ridges, it should also be consumed. Where is the crust ...
... New bathymetric measurements define the continental crust boundary. Do South America and Africa still fit together? If crust is being created at mid-ocean ridges, it should also be consumed. Where is the crust ...
(with Death Valley) Geoscience 10: Geology of The National Parks
... The deeper a mine or oil well is, the hotter it is at the bottom; volcanoes bring up heat from below; Earth’s heat made mostly by decay of natural radioactive atoms in rocks; How materials (and people!) behave depends on what they are (iron, silica, etc.) and on the conditions they are placed in (he ...
... The deeper a mine or oil well is, the hotter it is at the bottom; volcanoes bring up heat from below; Earth’s heat made mostly by decay of natural radioactive atoms in rocks; How materials (and people!) behave depends on what they are (iron, silica, etc.) and on the conditions they are placed in (he ...
Chapter 10: Plate Tectonics
... plates have been identified 3. Plates are often bordered by major surface features, such as mountain ranges or oceanic trenches ...
... plates have been identified 3. Plates are often bordered by major surface features, such as mountain ranges or oceanic trenches ...
Part B - Bakersfield College
... • thinner and more dense plate subducts • subducted plates melt (160 km) below the surface, and magma rises • EQ’s occur along the subduction zone, and magma plumes rise • typically, the older plate will subduct (more dense) beneath younger plate material ...
... • thinner and more dense plate subducts • subducted plates melt (160 km) below the surface, and magma rises • EQ’s occur along the subduction zone, and magma plumes rise • typically, the older plate will subduct (more dense) beneath younger plate material ...
Mantle plume
A mantle plume is a mechanism proposed in 1971 to explain volcanic regions of the earth that were not thought to be explicable by the then-new theory of plate tectonics. Some such volcanic regions lie far from tectonic plate boundaries, for example, Hawaii. Others represent unusually large-volume volcanism, whether on plate boundaries, e.g. Iceland, or basalt floods such as the Deccan or Siberian traps.A mantle plume is posited to exist where hot rock nucleates at the core-mantle boundary and rises through the Earth's mantle becoming a diapir in the Earth's crust. The currently active volcanic centers are known as ""hot spots"". In particular, the concept that mantle plumes are fixed relative to one another, and anchored at the core-mantle boundary, was thought to provide a natural explanation for the time-progressive chains of older volcanoes seen extending out from some such hot spots, such as the Hawaiian–Emperor seamount chain.The hypothesis of mantle plumes from depth is not universally accepted as explaining all such volcanism. It has required progressive hypothesis-elaboration leading to variant propositions such as mini-plumes and pulsing plumes. Another hypothesis for unusual volcanic regions is the ""Plate model"". This proposes shallower, passive leakage of magma from the mantle onto the Earth's surface where extension of the lithosphere permits it, attributing most volcanism to plate tectonic processes, with volcanoes far from plate boundaries resulting from intraplate extension.