Plate Tectonics - Open Earth Systems
... A subduction zone occurs when one oceanic plate is forced down into the mantle beneath a second plate. Oceanic-Continental • Denser oceanic slab sinks into the asthenosphere. • Pockets of magma develop and rise. • Continental volcanic arcs form in part by volcanic activity caused by the subducti ...
... A subduction zone occurs when one oceanic plate is forced down into the mantle beneath a second plate. Oceanic-Continental • Denser oceanic slab sinks into the asthenosphere. • Pockets of magma develop and rise. • Continental volcanic arcs form in part by volcanic activity caused by the subducti ...
Directed Reading
... 2. By what time period was evidence supporting continental drift, which led to the development of plate tectonics, developed? ...
... 2. By what time period was evidence supporting continental drift, which led to the development of plate tectonics, developed? ...
Review Sheet Quiz 2
... 1) Earth's interior is a dynamic system with relatively warm rock rising and cool rock sinking, all as part of the cooling process of the planet. a) True b) False 2) Alfred Wegener proposed the idea of Continental Drift based on all but which of the following: a) Continental coastlines b) Magnetic S ...
... 1) Earth's interior is a dynamic system with relatively warm rock rising and cool rock sinking, all as part of the cooling process of the planet. a) True b) False 2) Alfred Wegener proposed the idea of Continental Drift based on all but which of the following: a) Continental coastlines b) Magnetic S ...
3 How does the movement of lithospheric plates cause major events
... ocean trench - a long narrow trench when one plate goes under another at a convergent boundary rift valley – a gap at divergent boundaries where molten material rises to build new crust. This can be at oceanic (mid-ocean ridges) and continental (volcanoes, lakes, rivers) hot spot – heat from a plume ...
... ocean trench - a long narrow trench when one plate goes under another at a convergent boundary rift valley – a gap at divergent boundaries where molten material rises to build new crust. This can be at oceanic (mid-ocean ridges) and continental (volcanoes, lakes, rivers) hot spot – heat from a plume ...
PLATE TECTONICS - UA Geosciences
... There are very few such long lived plume products and it is questionable whether they remain fixed. The common way of tracking plate motions is in a relative framework. Some useful rules: 1. Plate motions are transform parallel; 2. Plate moves away from ridge 3. The sum of relative plate velocities ...
... There are very few such long lived plume products and it is questionable whether they remain fixed. The common way of tracking plate motions is in a relative framework. Some useful rules: 1. Plate motions are transform parallel; 2. Plate moves away from ridge 3. The sum of relative plate velocities ...
Localized shear in the deep lithosphere beneath the San Andreas
... Heather A. Ford (Yale Univ.), Karen M. Fischer (Brown Univ.) and Vedran Lekic (Univ. of Maryland) The extent and geometry of strike-slip plate boundaries in the deep mantle lithosphere is an important, yet unresolved, aspect of plate tectonics. Models range from localized shear zones that are deep e ...
... Heather A. Ford (Yale Univ.), Karen M. Fischer (Brown Univ.) and Vedran Lekic (Univ. of Maryland) The extent and geometry of strike-slip plate boundaries in the deep mantle lithosphere is an important, yet unresolved, aspect of plate tectonics. Models range from localized shear zones that are deep e ...
Plate Tectonics and Continental Drift
... (1) The subducting plate bends downward forming the outer wall of an oceanic trench (2) The trench forms a broad curve convex to the subducting plate due to Earth’s rounded surface. ...
... (1) The subducting plate bends downward forming the outer wall of an oceanic trench (2) The trench forms a broad curve convex to the subducting plate due to Earth’s rounded surface. ...
The Rock Cycle
... If you guessed a volcanic eruption, you were right. One day we just exploded onto the crust. It was amazing. Chip and I were no longer magma. We had become lava that was flowing onto continental crust. When we finally cooled off enough we stopped flowing, and we saw things we had never seen before. ...
... If you guessed a volcanic eruption, you were right. One day we just exploded onto the crust. It was amazing. Chip and I were no longer magma. We had become lava that was flowing onto continental crust. When we finally cooled off enough we stopped flowing, and we saw things we had never seen before. ...
Land Formations - Library Video Company
... 1. Set the oatmeal carton on its side. It will represent the mantle of the Earth. At this point, the mantle is not covered by any crust. 2. Prepare your mid-ocean ridge and your two deep trenches. Using the scissors, carefully cut a slit vertically in the side of the oatmeal carton that’s about 12 c ...
... 1. Set the oatmeal carton on its side. It will represent the mantle of the Earth. At this point, the mantle is not covered by any crust. 2. Prepare your mid-ocean ridge and your two deep trenches. Using the scissors, carefully cut a slit vertically in the side of the oatmeal carton that’s about 12 c ...
Earth`s Structure Model
... and nickel (Ni). Molten describes materials that change to liquid form when exposed to extreme amounts of thermal energy. ...
... and nickel (Ni). Molten describes materials that change to liquid form when exposed to extreme amounts of thermal energy. ...
Plate Tectonics
... the subduction is interrupted. • Because the continental crust is made of low density material, it does not sink. • The crust moves upward, folds and buckles and ...
... the subduction is interrupted. • Because the continental crust is made of low density material, it does not sink. • The crust moves upward, folds and buckles and ...
Study Guide: Plate Tectonics Test
... 2. Wegener’s Continental Drift Theory was supported by the following evidence: a. Landforms: When Wegener looked at maps of Africa and South America, a mountain range running from east to west in South Africa lined up with a range in Argentina. European coal fields matched up with similar coal field ...
... 2. Wegener’s Continental Drift Theory was supported by the following evidence: a. Landforms: When Wegener looked at maps of Africa and South America, a mountain range running from east to west in South Africa lined up with a range in Argentina. European coal fields matched up with similar coal field ...
Ocean Topography
... sea floor to the Continental shelf. This is still considered to be part of the Continent. ...
... sea floor to the Continental shelf. This is still considered to be part of the Continent. ...
Volcanism in Response to Plate Flexure
... Volcanism on Earth is known to occur in three tectonic settings: divergent plate boundaries (such as mid-ocean ridges), convergent plate boundaries (such as island arcs), and hot spots. We report volcanism on the 135 million-year-old Pacific Plate not belonging to any of these categories. Small alka ...
... Volcanism on Earth is known to occur in three tectonic settings: divergent plate boundaries (such as mid-ocean ridges), convergent plate boundaries (such as island arcs), and hot spots. We report volcanism on the 135 million-year-old Pacific Plate not belonging to any of these categories. Small alka ...
Cross section of the Earth
... layer of red-hot solid rocks; some of these rocks are so soft that they ooze about and can blast out of cracks in the crust, as lava. The layer under the mantle is called the Outer Core. It is made of liquid iron and nickel. Special movement in this section is responsible for the Earth’s magnetic ...
... layer of red-hot solid rocks; some of these rocks are so soft that they ooze about and can blast out of cracks in the crust, as lava. The layer under the mantle is called the Outer Core. It is made of liquid iron and nickel. Special movement in this section is responsible for the Earth’s magnetic ...
Seafloor spreading
... recognition in science. Seismological investigations showed that the Earth merely has a thin solid crust that floats on a plastic mantle. Deep inside our planet there’s a very hot core. The Earth’s crust, which contains the continents and seafloor, is geologically divided into seven large and numero ...
... recognition in science. Seismological investigations showed that the Earth merely has a thin solid crust that floats on a plastic mantle. Deep inside our planet there’s a very hot core. The Earth’s crust, which contains the continents and seafloor, is geologically divided into seven large and numero ...
Earth`s Layers PowerPoint
... How do we know there are layers of the earth? •Earthquakes emit different kinds of seismic waves that can travel through different substances and at different speeds •Scientists used these waves to determine the layers based on the speed and movement of the layers! ...
... How do we know there are layers of the earth? •Earthquakes emit different kinds of seismic waves that can travel through different substances and at different speeds •Scientists used these waves to determine the layers based on the speed and movement of the layers! ...
Plate Tectonics
... the subduction is interrupted. • Because the continental crust is made of low density material, it does not sink. • The crust moves upward, folds and buckles and ...
... the subduction is interrupted. • Because the continental crust is made of low density material, it does not sink. • The crust moves upward, folds and buckles and ...
Oreo Cookie Plate Tectonics
... The outer shell is the lithosphere from the Greek “lithos,” meaning hard rock. The plates, composed of Earth’s crust and uppermost mantle, ride on a warmer, softer layer of the mantle, is the asthenosphere. The Greek “asthenes” means ...
... The outer shell is the lithosphere from the Greek “lithos,” meaning hard rock. The plates, composed of Earth’s crust and uppermost mantle, ride on a warmer, softer layer of the mantle, is the asthenosphere. The Greek “asthenes” means ...
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.