Document
... happened in each major event in right side column (use headers) 3. Gives a time frame for each major event (Add dates). ...
... happened in each major event in right side column (use headers) 3. Gives a time frame for each major event (Add dates). ...
Earth`s History - cloudfront.net
... • At ____________________ ____________________, magma rises up in the gap between the two plates that are pulling apart. Recall that _______________ _______________ form in ...
... • At ____________________ ____________________, magma rises up in the gap between the two plates that are pulling apart. Recall that _______________ _______________ form in ...
LECTURE 13
... Extend through all the major ocean basins with a total length in excess of 60,000 km. With the exception of the East Pacific Rise, they occur in the middle part of the oceans and essentially form a submarine mountain range, which slopes to its highest elevation at the ridge crest and slopes away sys ...
... Extend through all the major ocean basins with a total length in excess of 60,000 km. With the exception of the East Pacific Rise, they occur in the middle part of the oceans and essentially form a submarine mountain range, which slopes to its highest elevation at the ridge crest and slopes away sys ...
CHAPTER 18 Volcanism
... massive ranges that extends 2,500 kilometers across South Asia north of India. The Himalayas cover all or part of the countries of Tibet, Nepal, and Bhutan. A climber on the high slopes of Mt. Everest would probably be surprised to learn that the region was relatively flat about 40 million years ago ...
... massive ranges that extends 2,500 kilometers across South Asia north of India. The Himalayas cover all or part of the countries of Tibet, Nepal, and Bhutan. A climber on the high slopes of Mt. Everest would probably be surprised to learn that the region was relatively flat about 40 million years ago ...
Earth Science – Quiz 2
... 31. New oceanic crust and lithosphere are formed at ________. a. divergent boundaries by submarine eruptions and intrusions of rhyolitic magma b. convergent boundaries by submarine eruptions and intrusions of rhyolitic magma c. convergent boundaries by submarine eruptions and intrusions of basaltic ...
... 31. New oceanic crust and lithosphere are formed at ________. a. divergent boundaries by submarine eruptions and intrusions of rhyolitic magma b. convergent boundaries by submarine eruptions and intrusions of rhyolitic magma c. convergent boundaries by submarine eruptions and intrusions of basaltic ...
Chapter 32: Plate Tectonics: A Working Model for the Earth
... the hot regions do not project vertically downward. Rather, the deep heat sources are somewhat offset from the surface features. It appears that we are seeing convection currents all right, but as they rise they are also carried horizontally and are not nearly as geometrically simple as suggested in ...
... the hot regions do not project vertically downward. Rather, the deep heat sources are somewhat offset from the surface features. It appears that we are seeing convection currents all right, but as they rise they are also carried horizontally and are not nearly as geometrically simple as suggested in ...
mantle - Uplift Mighty Prep
... the Earth was in a fluid state. • As the Earth began to cool, the materials began to separate because of their densities. What do you think happened to the more dense materials during the separation? What about the less dense materials? ...
... the Earth was in a fluid state. • As the Earth began to cool, the materials began to separate because of their densities. What do you think happened to the more dense materials during the separation? What about the less dense materials? ...
Plate Boundarieskouts
... Part of the Pacific Ring of Fire The Juan de Fuca subducts underneath the North American Plate ...
... Part of the Pacific Ring of Fire The Juan de Fuca subducts underneath the North American Plate ...
ES Ch 1 Test
... b. convection. d. subduction. ______ 5. Using data from seismic waves, geologists have learned that Earth’s interior is made up of several a. continents. c. ridges. b. layers. d. trenches. ______ 6. Which of Earth’s layers is the thickest? a. the crust c. the outer core b. the mantle d. the inner co ...
... b. convection. d. subduction. ______ 5. Using data from seismic waves, geologists have learned that Earth’s interior is made up of several a. continents. c. ridges. b. layers. d. trenches. ______ 6. Which of Earth’s layers is the thickest? a. the crust c. the outer core b. the mantle d. the inner co ...
Changes to the Earth`s rocks and atmosphere
... New evidence supports Wegener’s theory New evidence from exploring the ocean floor rocks, including the magnetic striping patterns of the mid-ocean rocks, gives us the idea that it is the radioactivity from uranium and thorium that provides the enormous heat source that creates the convection curren ...
... New evidence supports Wegener’s theory New evidence from exploring the ocean floor rocks, including the magnetic striping patterns of the mid-ocean rocks, gives us the idea that it is the radioactivity from uranium and thorium that provides the enormous heat source that creates the convection curren ...
View PDF - Goldschmidt Conference Archive
... with felsic melts originated from previously subducted oceanic crust, whereas the mantle source for the first type of rocks would be generated by reaction of the cratonic mantle of the North China Block with felsic melts from subsequently subducted continental crust of the South China Block. It is t ...
... with felsic melts originated from previously subducted oceanic crust, whereas the mantle source for the first type of rocks would be generated by reaction of the cratonic mantle of the North China Block with felsic melts from subsequently subducted continental crust of the South China Block. It is t ...
Plate Models - Fairmont State University
... Point out on the map where the eastern edges of the Pacific Plate along the western edge of South America are subduction zones as well as areas along other trenches. Earthquakes and volcanoes tend to happen near subduction zones. Model C What happens when foam and cardboard push together? (The f ...
... Point out on the map where the eastern edges of the Pacific Plate along the western edge of South America are subduction zones as well as areas along other trenches. Earthquakes and volcanoes tend to happen near subduction zones. Model C What happens when foam and cardboard push together? (The f ...
plate tectonics
... Earthquake occurrence coincides with plate boundaries, reflecting the energy released during subduction, seafloor spreading or plates sliding past each other (transform). ...
... Earthquake occurrence coincides with plate boundaries, reflecting the energy released during subduction, seafloor spreading or plates sliding past each other (transform). ...
Ocean Floor Power Point
... Scientists are able to measure the direction and speed of ocean currents. Measure the different heights of the ocean surface to make maps of ocean floor. Can cover more territory using ...
... Scientists are able to measure the direction and speed of ocean currents. Measure the different heights of the ocean surface to make maps of ocean floor. Can cover more territory using ...
For Creative Minds - Arbordale Publishing
... The water causes part of the mantle to melt—making magma. Since magma is less dense than the rock around it, it moves up—just as a balloon floats up into the air. As it moves up, it melts the solid rock in the Earth’s crust along the way. The magma pools as a magma chamber. Gases in the magma can ca ...
... The water causes part of the mantle to melt—making magma. Since magma is less dense than the rock around it, it moves up—just as a balloon floats up into the air. As it moves up, it melts the solid rock in the Earth’s crust along the way. The magma pools as a magma chamber. Gases in the magma can ca ...
Abstract - gemoc - Macquarie University
... represents a milestone in Earth dynamics as it will have had a profound interaction with, and influence on, plate tectonics. Amalgams of lithospheric blocks form rigid cratons, dictating a minimum plate size, localizing subduction on their margins, and facilitating the transfer of stress during accr ...
... represents a milestone in Earth dynamics as it will have had a profound interaction with, and influence on, plate tectonics. Amalgams of lithospheric blocks form rigid cratons, dictating a minimum plate size, localizing subduction on their margins, and facilitating the transfer of stress during accr ...
Slow and Steady
... and volcanic islands form. This can be seen in the island chain of Hawaii. Plate boundaries also exist where plates pull away from each other. These are called divergent plate boundaries. At these boundaries, magma from beneath the earth’s crust rises to the surface and pushes apart the tectonic pla ...
... and volcanic islands form. This can be seen in the island chain of Hawaii. Plate boundaries also exist where plates pull away from each other. These are called divergent plate boundaries. At these boundaries, magma from beneath the earth’s crust rises to the surface and pushes apart the tectonic pla ...
EARTH SYSTEMS (Plate Tectonics) KUD
... about crustal movement. Materials will separate based on their densities if in a fluid mixture. Temperature affects the density of a material. For materials other than water, the density decreases as the temperature increases. Temperature changes to one part of a fluid mixture will change the relati ...
... about crustal movement. Materials will separate based on their densities if in a fluid mixture. Temperature affects the density of a material. For materials other than water, the density decreases as the temperature increases. Temperature changes to one part of a fluid mixture will change the relati ...
Tectonics and Sea Floor Spreading
... The theory of Plate Tectonics explains most observable geological features on the surface of the Earth as the result of a major, unified pattern of large scale horizontal motions, involving the shallowest portions of the planet. In turns, motions of the “plates” thus defined at the surface of the Ea ...
... The theory of Plate Tectonics explains most observable geological features on the surface of the Earth as the result of a major, unified pattern of large scale horizontal motions, involving the shallowest portions of the planet. In turns, motions of the “plates” thus defined at the surface of the Ea ...
Collision-induced mantle flow during Tethyan closure: a link
... represent lithospheric detritus accumulated at the core-mantle interface, they may be more plausibly explained by selective delamination of dispersed Gondwana cratonic roots in a context of shallow-level mantle convection. This type of model is supported by new thermobarometric and isotopic data for ...
... represent lithospheric detritus accumulated at the core-mantle interface, they may be more plausibly explained by selective delamination of dispersed Gondwana cratonic roots in a context of shallow-level mantle convection. This type of model is supported by new thermobarometric and isotopic data for ...
Year 9 Lesson Kit - Kronosaurus Korner
... tectonic plates (answer: no). The teacher will note that Australia doesn’t have any very tall mountains, as there are no plates colliding underneath Australia. They will state that Australia is relatively geologically stable with no active volcanos or large earthquakes. As a result, it also has some ...
... tectonic plates (answer: no). The teacher will note that Australia doesn’t have any very tall mountains, as there are no plates colliding underneath Australia. They will state that Australia is relatively geologically stable with no active volcanos or large earthquakes. As a result, it also has some ...
A-level Geography Teaching Guidance GEOG Unit 3
... coastlines. [Strong knowledge (K), together with evidence of synopticity in the latter two sentences] Wegener’s ideas, though simple, [first sign of critical understanding (c/u)] were proved further right and built upon which further increased our understanding of tectonic events. Sea floor spreadin ...
... coastlines. [Strong knowledge (K), together with evidence of synopticity in the latter two sentences] Wegener’s ideas, though simple, [first sign of critical understanding (c/u)] were proved further right and built upon which further increased our understanding of tectonic events. Sea floor spreadin ...
E8C4_PlateMovement_Final
... shaping the planet. Earthquakes, volcanoes, and mountain building are geologic events that result from the very slow movement of large crustal plates. Although earthquake and volcanic events may be “destructive” to society, they are responsible for creating much of the topography present on our plan ...
... shaping the planet. Earthquakes, volcanoes, and mountain building are geologic events that result from the very slow movement of large crustal plates. Although earthquake and volcanic events may be “destructive” to society, they are responsible for creating much of the topography present on our plan ...
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.