Snack Tectonics
... are made of rock, but the rock is, in general, lightweight compared with the denser, fluid layer underneath. This allows the plates to "float" on top of the denser material. The fluid dense material is called asthenosphere and in this activity the frosting represents it. However, plates are not all ...
... are made of rock, but the rock is, in general, lightweight compared with the denser, fluid layer underneath. This allows the plates to "float" on top of the denser material. The fluid dense material is called asthenosphere and in this activity the frosting represents it. However, plates are not all ...
Plates move apart.
... measure the speed and direction of plate movements. For example, the Yellowstone hot spot under the North American Plate has formed a chain of inactive volcanoes, as shown in the diagram on the right. Scientists estimate that the North American Plate is moving southwest at about 2.3 cm (1 in.) per y ...
... measure the speed and direction of plate movements. For example, the Yellowstone hot spot under the North American Plate has formed a chain of inactive volcanoes, as shown in the diagram on the right. Scientists estimate that the North American Plate is moving southwest at about 2.3 cm (1 in.) per y ...
Prelude :: Just What is Geology?
... Be able to describe the following bathymetric features: Mid ocean ridge, fracture zone, abyssal plain, trench, guyot, seamount. Where are these features found on the seafloor? ...
... Be able to describe the following bathymetric features: Mid ocean ridge, fracture zone, abyssal plain, trench, guyot, seamount. Where are these features found on the seafloor? ...
The Geologic History of ANWR The purpose of this section is to
... The plate that ANWR rests upon is part of small continental fragment call Artic Alaska micro plate. Historically, most hypotheses regarding plate tectonics hold that Cretaceous rifting and the opening of the oceanic Canadian basin of the Artic ocean is what gave rise to the eventual positioning of A ...
... The plate that ANWR rests upon is part of small continental fragment call Artic Alaska micro plate. Historically, most hypotheses regarding plate tectonics hold that Cretaceous rifting and the opening of the oceanic Canadian basin of the Artic ocean is what gave rise to the eventual positioning of A ...
Os isotopic compositions of basaltic andesites and hawaiites of the
... hawaiite and mugerite. The hawaiite and mugerite are unusual rocks for continental-arc settings suggesting that both hydrous, fluid-enriched sub arc mantle and oceanic island type mantle may be present beneath western Mexico (Righter and Carmichael, 1992). Basaltic andesite and hawaiites were analys ...
... hawaiite and mugerite. The hawaiite and mugerite are unusual rocks for continental-arc settings suggesting that both hydrous, fluid-enriched sub arc mantle and oceanic island type mantle may be present beneath western Mexico (Righter and Carmichael, 1992). Basaltic andesite and hawaiites were analys ...
Earth`s Interior WebQuest
... Use the website below to answer the following questions http://www.windows2universe.org/earth/Interior_Structure/interior.html 9. First read the structure of the earth intro The earth’s interior is hotter then what? ____________________________ The heat from Earth’s interior may cause what two thing ...
... Use the website below to answer the following questions http://www.windows2universe.org/earth/Interior_Structure/interior.html 9. First read the structure of the earth intro The earth’s interior is hotter then what? ____________________________ The heat from Earth’s interior may cause what two thing ...
P1: The Earth and the Universe: Revision
... 6. What is tectonic plate and where do you find one (of 12)? a giant slab of rock comprising of crust and upper mantle which makes up the Earth’s outer layer 7. How did Barringer know an asteroid created his crater? Evidence: many fragments of iron / quartz dust particles / layers of rock in revers ...
... 6. What is tectonic plate and where do you find one (of 12)? a giant slab of rock comprising of crust and upper mantle which makes up the Earth’s outer layer 7. How did Barringer know an asteroid created his crater? Evidence: many fragments of iron / quartz dust particles / layers of rock in revers ...
Earth’s Complex Complexion
... there is now a third, ultraslow. Ultraslow-spreading ridges, which may make up one-third of the global ocean ridge system, have distinctive characteristics. Like other mid-ocean ridges, ultraslow ridges have areas where magma rises from the mantle and erupts at the seafloor to create new ocean crust. ...
... there is now a third, ultraslow. Ultraslow-spreading ridges, which may make up one-third of the global ocean ridge system, have distinctive characteristics. Like other mid-ocean ridges, ultraslow ridges have areas where magma rises from the mantle and erupts at the seafloor to create new ocean crust. ...
Chapter 10 Worksheet
... (a) Formed by bending down of a slab as it enters a subduction zone. (b) mid-ocean ridge (b) A rising plume of mantle melts and causes melting of adjacent lithosphere. (c) oceanic plateau (c) Sediment is transported by turbidity currents from the edge of the continent into deeper water. (d) continen ...
... (a) Formed by bending down of a slab as it enters a subduction zone. (b) mid-ocean ridge (b) A rising plume of mantle melts and causes melting of adjacent lithosphere. (c) oceanic plateau (c) Sediment is transported by turbidity currents from the edge of the continent into deeper water. (d) continen ...
Earthquakes and Plate Boundaries
... This occurs because newer warm rock cools and becomes denser allowing it to sink into the asthenosphere and push away from the ridge. The largest ridge on our planet is located in the Atlantic Ocean and is known as the Mid-Atlantic Ridge (3) Slab Pull Old parts of a plate will sink down into the man ...
... This occurs because newer warm rock cools and becomes denser allowing it to sink into the asthenosphere and push away from the ridge. The largest ridge on our planet is located in the Atlantic Ocean and is known as the Mid-Atlantic Ridge (3) Slab Pull Old parts of a plate will sink down into the man ...
GE 121 Physical and Historical Geology I Earth’s Dynamic Systems 10
... 5. Where plates move apart, hot material from the mantle wells up to fill the void and creates new lithosphere. The major features formed where plates spread apart are continental rifts, oceanic ridges, and new ocean basins. 6. Where plates converge, one slides beneath the other and plunges down int ...
... 5. Where plates move apart, hot material from the mantle wells up to fill the void and creates new lithosphere. The major features formed where plates spread apart are continental rifts, oceanic ridges, and new ocean basins. 6. Where plates converge, one slides beneath the other and plunges down int ...
Graham Cracker Model of Plate Tectonics
... Background The Theory of Plate Tectonics states that the crust of the Earth is composed of seven major plates and numerous smaller plates. These plates “ride” on the hot plastic upper mantle known as the asthenosphere. This theory also says that most of these plates are in motion, due to convection ...
... Background The Theory of Plate Tectonics states that the crust of the Earth is composed of seven major plates and numerous smaller plates. These plates “ride” on the hot plastic upper mantle known as the asthenosphere. This theory also says that most of these plates are in motion, due to convection ...
File - Ms. D. Science CGPA
... As the rock gets hotter, its density decreases and it rises. As the rock rises, it gets cooler and its density increases and it sinks. This process of heat transfer is called convection and is the force behind the convections currents in the mantle. Convection currents in the mantle transfer heat to ...
... As the rock gets hotter, its density decreases and it rises. As the rock rises, it gets cooler and its density increases and it sinks. This process of heat transfer is called convection and is the force behind the convections currents in the mantle. Convection currents in the mantle transfer heat to ...
Chapter 1—The Science of Historical Geology
... evidence, it may be elevated to the status of a theory. This generally takes a long time and requires the work of many people. 2. The lithosphere is the rigid outer layer of Earth – roughly 100 km thick – that includes the crust as well as the uppermost part of the mantle. The crust is a part of the ...
... evidence, it may be elevated to the status of a theory. This generally takes a long time and requires the work of many people. 2. The lithosphere is the rigid outer layer of Earth – roughly 100 km thick – that includes the crust as well as the uppermost part of the mantle. The crust is a part of the ...
Powerpoint
... Blocks rotations have been documented by paleomag. Can block rotations be measured geodetically? ...
... Blocks rotations have been documented by paleomag. Can block rotations be measured geodetically? ...
EES Review for Final Exam
... Earthquake distance and direction. how can you determine the distance to the EQ? How can you locate the EQ itself? Ring of Fire Measuring EQs: Richter Scale, Moment magnitude Liquefaction of the soil; Tsunamis; landslides, and fire Earth’s layers structure: Core, mantle, crust Lithosphere, asthenosp ...
... Earthquake distance and direction. how can you determine the distance to the EQ? How can you locate the EQ itself? Ring of Fire Measuring EQs: Richter Scale, Moment magnitude Liquefaction of the soil; Tsunamis; landslides, and fire Earth’s layers structure: Core, mantle, crust Lithosphere, asthenosp ...
Chapter 2
... depend on the direction of relative plate motion and the type of crust. At which kind of plate boundary is new oceanic lithosphere formed? A. Oceanic transform boundary ...
... depend on the direction of relative plate motion and the type of crust. At which kind of plate boundary is new oceanic lithosphere formed? A. Oceanic transform boundary ...
Plate Tectonics and Global Impacts – Tutorial Script - FOG
... Now that we know where the plate boundaries are, how can we determine what types of boundaries they are? We can measure their movement, and we can study the surrounding topography, bathymetry, and geology. For example, what do we see in South America that shows us subduction is going on? The dark-bl ...
... Now that we know where the plate boundaries are, how can we determine what types of boundaries they are? We can measure their movement, and we can study the surrounding topography, bathymetry, and geology. For example, what do we see in South America that shows us subduction is going on? The dark-bl ...
Marking your Boundaries!!
... Abundant volcanoes form (submarine volcanoes) As the volcanoes build up over time and appear at the surface, this chain of volcanoes appearing over the water is known as island arcs ...
... Abundant volcanoes form (submarine volcanoes) As the volcanoes build up over time and appear at the surface, this chain of volcanoes appearing over the water is known as island arcs ...
Earth`s Surface Vocabulary
... Rock that is formed when heat and pressure change the minerals in the igneous or sedimentary rocks; examples are marble, soapstone, and slate. ...
... Rock that is formed when heat and pressure change the minerals in the igneous or sedimentary rocks; examples are marble, soapstone, and slate. ...
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.