The 4 Earth Sciences
... this cloud began to shrink and therefore spin faster. • The inner material was so hot that nuclear fusion began, creating our sun ...
... this cloud began to shrink and therefore spin faster. • The inner material was so hot that nuclear fusion began, creating our sun ...
The 4 Earth Sciences
... this cloud began to shrink and therefore spin faster. • The inner material was so hot that nuclear fusion began, creating our sun ...
... this cloud began to shrink and therefore spin faster. • The inner material was so hot that nuclear fusion began, creating our sun ...
Size Matters, The Royal Institution Christmas Lectures 2010
... 4. Glue your continents below to show how the modern continents might have been arranged many millions of years ago. ...
... 4. Glue your continents below to show how the modern continents might have been arranged many millions of years ago. ...
Inside Earth Worksheet
... 1. Draw and label a model of the Earth’s layers. Be sure to label both the compositional layers and physical properties layers. You may draw two separate models for each “type” of layers or just one. ...
... 1. Draw and label a model of the Earth’s layers. Be sure to label both the compositional layers and physical properties layers. You may draw two separate models for each “type” of layers or just one. ...
platetectonics
... 800 mile long boundary between the Pacific and North American Plates. It is the main fault of an intricate network of faults spanning the California coastal region. At its deepest, the San ...
... 800 mile long boundary between the Pacific and North American Plates. It is the main fault of an intricate network of faults spanning the California coastal region. At its deepest, the San ...
Molnar, P. (2011), Jack Oliver (1923-2011), Nature, 470, 176.
... tectonics and deep imaging of Earth’s continental crust. He and Bryan Isacks, a former graduate student whom he had advised, showed that not just Earth’s crust, but the entire 100-kilometre-thick outer layer of Earth, the lithosphere, moves over the face of the planet before plunging into the weaker ...
... tectonics and deep imaging of Earth’s continental crust. He and Bryan Isacks, a former graduate student whom he had advised, showed that not just Earth’s crust, but the entire 100-kilometre-thick outer layer of Earth, the lithosphere, moves over the face of the planet before plunging into the weaker ...
33.2 – Folding and Faulting
... a. Two plates moving towards each other that squeeze a plate in between is called compression b. Two plates moving away from each other that pull a plate apart is called tension 2. Plates deform under stress a. Deform = change shape i. elastic deformation means it deforms, but returns to its initial ...
... a. Two plates moving towards each other that squeeze a plate in between is called compression b. Two plates moving away from each other that pull a plate apart is called tension 2. Plates deform under stress a. Deform = change shape i. elastic deformation means it deforms, but returns to its initial ...
Chap-4-Sec-2-Evidence-Supporting-Continental
... theory that explains these movements is called "plate tectonics." It was developed in the mid 1960s by geophysicists. The term "plate" refers to large rigid blocks of the Earth's surface which appear to move as a unit. These plates may include both oceans and continents. When the plates move, the co ...
... theory that explains these movements is called "plate tectonics." It was developed in the mid 1960s by geophysicists. The term "plate" refers to large rigid blocks of the Earth's surface which appear to move as a unit. These plates may include both oceans and continents. When the plates move, the co ...
Slide 1
... Volcanoes are mountains grow taller with time when they erupt. The molten rock, magma, comes from inside the earth and erupts onto the surface. The period of time a volcano is known to be active is unknown, because some seem to erupt forever. The volcano might be explosive and produce ashes and lava ...
... Volcanoes are mountains grow taller with time when they erupt. The molten rock, magma, comes from inside the earth and erupts onto the surface. The period of time a volcano is known to be active is unknown, because some seem to erupt forever. The volcano might be explosive and produce ashes and lava ...
Plate Teconics - FAU-Department of Geosciences
... Vine-Matthews-Morley Theory • If we assume sea-floor spreading is occurring, the magnetic field of the rock is fixed, in alignment with the earth’s field, at the time the rock cools • The measured field above such rocks equals the earth’s field plus the rock’s field (because they are aligned) ...
... Vine-Matthews-Morley Theory • If we assume sea-floor spreading is occurring, the magnetic field of the rock is fixed, in alignment with the earth’s field, at the time the rock cools • The measured field above such rocks equals the earth’s field plus the rock’s field (because they are aligned) ...
File
... the uppermost part of the mantle. It is relatively rigid and brittle and resists deformation. The mobile lithosphere is, in a sense, floating on top of the asthenosphere. 10. How does continental crust differ from oceanic crust? They differ in density, composition, and thickness. Oceanic crust is th ...
... the uppermost part of the mantle. It is relatively rigid and brittle and resists deformation. The mobile lithosphere is, in a sense, floating on top of the asthenosphere. 10. How does continental crust differ from oceanic crust? They differ in density, composition, and thickness. Oceanic crust is th ...
Physical Geology Lab
... 2. How does heat inside the Earth power our planet‟s dynamic processes (plate movement, earthquakes, volcanoes, mountain building, and formation of the atmosphere, weather and climate)? How is this heat essential for life on Earth? 3. Why are we not able to make direct observations of the Earth‟s co ...
... 2. How does heat inside the Earth power our planet‟s dynamic processes (plate movement, earthquakes, volcanoes, mountain building, and formation of the atmosphere, weather and climate)? How is this heat essential for life on Earth? 3. Why are we not able to make direct observations of the Earth‟s co ...
Natural Hazards - Geology 209 Homework assignment #3
... magnetic field at the time that the rock was formed. The study of this ancient fossilized magnetism is called paleomagnetism - what Professor Weil does. Paleomagnetic studies were instrumental in leading to the widespread acceptance of plate tectonics. The Earth's magnetic field behaves very much li ...
... magnetic field at the time that the rock was formed. The study of this ancient fossilized magnetism is called paleomagnetism - what Professor Weil does. Paleomagnetic studies were instrumental in leading to the widespread acceptance of plate tectonics. The Earth's magnetic field behaves very much li ...
File - Mr. Snelgrove
... Besides the idea of plates, Wilson also discovered stationary hotspots, which explained volcanism within plates. He also discovered transform faults along divergent plate boundaries. (WILL DEAL WITH THESE LATER). ...
... Besides the idea of plates, Wilson also discovered stationary hotspots, which explained volcanism within plates. He also discovered transform faults along divergent plate boundaries. (WILL DEAL WITH THESE LATER). ...
Themes in Regional Geography
... • So what drives continental drift? – Exchange of heat energy from the inner Earth • Described by Plate Tectonics theory ...
... • So what drives continental drift? – Exchange of heat energy from the inner Earth • Described by Plate Tectonics theory ...
3 The Theory of Plate Tectonics
... Why Do Tectonic Plates Move? Scientists do not know for sure what causes tectonic plates to move. They have three main hypotheses to explain plate movements: convection, slab pull, and ridge push. Scientists used to think that convection in the mantle was the main force that caused plate motions. Re ...
... Why Do Tectonic Plates Move? Scientists do not know for sure what causes tectonic plates to move. They have three main hypotheses to explain plate movements: convection, slab pull, and ridge push. Scientists used to think that convection in the mantle was the main force that caused plate motions. Re ...
Chapter 20: Mountain Building
... 1. When did the formation of the Appalachians begin? 2. When did the plate movements reverse in forming the Appalachians? 3. According to Figure 20-11, when did the fragment that was to become the Blue Ridge Province attached to N. America? 4. According to Figure 20-11, what does the island arc that ...
... 1. When did the formation of the Appalachians begin? 2. When did the plate movements reverse in forming the Appalachians? 3. According to Figure 20-11, when did the fragment that was to become the Blue Ridge Province attached to N. America? 4. According to Figure 20-11, what does the island arc that ...
geol_15_patton_fall_..
... distance from the fault)? Where are some places that I discussed examples of earthquakes? What type of plate boundaries and what type of earthquakes were they (Denali 2002, San Francisco 1906, Aleutians 2013, Sea of Okhotsk, 2013, Pakistan 2013)? Where do earthquakes occur (related to depth of hypoc ...
... distance from the fault)? Where are some places that I discussed examples of earthquakes? What type of plate boundaries and what type of earthquakes were they (Denali 2002, San Francisco 1906, Aleutians 2013, Sea of Okhotsk, 2013, Pakistan 2013)? Where do earthquakes occur (related to depth of hypoc ...
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.