UNIT 2 Metamorphism and tectonic plates: Metamorphism is a
... is very fluid. Their melting point is 1700 ºC. We have this type of lava in rifts. Orogens associated with continental collision: these orogens are produced by the collision between two continents (ex. Himalayas). They are called Alpine-type orogens. On a geological scale it is a much faster process ...
... is very fluid. Their melting point is 1700 ºC. We have this type of lava in rifts. Orogens associated with continental collision: these orogens are produced by the collision between two continents (ex. Himalayas). They are called Alpine-type orogens. On a geological scale it is a much faster process ...
IGCSE Physical Geography
... Destructive (plates converging – subduction or folding/faulting) Violent EQ’s & Volcanoes Constructive (plates move apart – oceanic ridges) Gentle Volcanoes & weak EQ’s Conservative (plates move past each other) Frequent, sometimes violent EQ’s ...
... Destructive (plates converging – subduction or folding/faulting) Violent EQ’s & Volcanoes Constructive (plates move apart – oceanic ridges) Gentle Volcanoes & weak EQ’s Conservative (plates move past each other) Frequent, sometimes violent EQ’s ...
Plate Tectonics - British Geological Survey
... www.bgs.ac.uk/education/earthquakes.html www.cotf.edu/ete/modules/msese/earthsysflr/plates1.html ...
... www.bgs.ac.uk/education/earthquakes.html www.cotf.edu/ete/modules/msese/earthsysflr/plates1.html ...
Plate Tectonics Definition
... The volcanism stems from the unique manner at which subduction produces molten rock. Some of the ocean water trapped in the oceanic crust is brought down into the asthenosphere with it. Because of the higher temperature, the water evaporates from the oceanic crust and dissolves into the wedge of as ...
... The volcanism stems from the unique manner at which subduction produces molten rock. Some of the ocean water trapped in the oceanic crust is brought down into the asthenosphere with it. Because of the higher temperature, the water evaporates from the oceanic crust and dissolves into the wedge of as ...
Chapter 4
... As the sea floor spreads away from a mid-ocean ridge, it carries with it a record of magnetic reversals and this record was the final proof that se-floor spreading does in fact ...
... As the sea floor spreads away from a mid-ocean ridge, it carries with it a record of magnetic reversals and this record was the final proof that se-floor spreading does in fact ...
Theory of Plate Tectonics
... • Distribution of fossil remains over several continents. • Similar rock layers on different continents. • Glacial marks on different continents appear to line when the continents are moved together. ...
... • Distribution of fossil remains over several continents. • Similar rock layers on different continents. • Glacial marks on different continents appear to line when the continents are moved together. ...
Why do volcanoes erupt?
... When two plates collide at a destructive plate boundary, subduction will occur and magma may rise to the surface. ...
... When two plates collide at a destructive plate boundary, subduction will occur and magma may rise to the surface. ...
Answer Key - Learn Earth Science
... ¾ What can people do to protect themselves during an earthquake? get under a desk/table, stand against an interior wall, stay away from windows ¾ What is the Richter scale and how is it used? What it is ...
... ¾ What can people do to protect themselves during an earthquake? get under a desk/table, stand against an interior wall, stay away from windows ¾ What is the Richter scale and how is it used? What it is ...
Chapter 5 Section 1 - Ms. Flythe's 6th Grade Science Class
... There are three main layers of Earth 1. The CRUST 2. The MANTLE 3. The CORE ...
... There are three main layers of Earth 1. The CRUST 2. The MANTLE 3. The CORE ...
The Solid Earth - cloudfront.net
... Lithosphere can sink under a lighter continental plate. Eventually, the plunging oceanic plate will disappear completely. This process is happening now off the coast of Oregon and Washington. The small Juan de Fuca Plate, a remnant of the formerly much larger oceanic Farallon Plate, will someday be ...
... Lithosphere can sink under a lighter continental plate. Eventually, the plunging oceanic plate will disappear completely. This process is happening now off the coast of Oregon and Washington. The small Juan de Fuca Plate, a remnant of the formerly much larger oceanic Farallon Plate, will someday be ...
Chemistry: Atoms First, McMurry and Fay, 1st Edition
... Plate Tectonic theory The movements of the plates and the interactions of plates along their boundaries cause volcanic eruptions, earthquakes, the formation of mountain ranges and ocean basins, and recycling of rock ...
... Plate Tectonic theory The movements of the plates and the interactions of plates along their boundaries cause volcanic eruptions, earthquakes, the formation of mountain ranges and ocean basins, and recycling of rock ...
File - Ms. D. Science CGPA
... Plate Boundaries pg. 185 Faults—breaks in Earth’s crust where rocks have slipped past each other—form along plate boundaries. Plate movements produce changes in Earth’s surface and on the ocean floor. These changes include the formation of volcanoes, mountain ranges, and deepocean trenches. ...
... Plate Boundaries pg. 185 Faults—breaks in Earth’s crust where rocks have slipped past each other—form along plate boundaries. Plate movements produce changes in Earth’s surface and on the ocean floor. These changes include the formation of volcanoes, mountain ranges, and deepocean trenches. ...
Slide 1
... great pressure so the rocks crumble together and form massive mountain chains like the Himalayas. The Himalayas are still growing today as the plates continue to be pushed together at about 1 or 2cm a year! The Himalayas are an example of fold mountains, where the rocks are colliding and folding tog ...
... great pressure so the rocks crumble together and form massive mountain chains like the Himalayas. The Himalayas are still growing today as the plates continue to be pushed together at about 1 or 2cm a year! The Himalayas are an example of fold mountains, where the rocks are colliding and folding tog ...
plate tectonics and california geology - FOG
... underbelly of ancient Sierran volcanism, the rifting activity is also producing a source of new volcanism to the area. The resulting volcanoes are completely different in character and cause to subduction-zone volcanoes, both by being more voluminous in their magma supply and more explosive in their ...
... underbelly of ancient Sierran volcanism, the rifting activity is also producing a source of new volcanism to the area. The resulting volcanoes are completely different in character and cause to subduction-zone volcanoes, both by being more voluminous in their magma supply and more explosive in their ...
Chapter One: Plate Tectonics
... • map where different types of rocks are found on and beneath the surface. • describe landforms, features that form in rock by water, wind, and waves. ...
... • map where different types of rocks are found on and beneath the surface. • describe landforms, features that form in rock by water, wind, and waves. ...
plate tectonics article from nat'l geo. fall 2012
... comes to shaping the Earth. The tiny Juan de Fuca plate is largely responsible for the volcanoes that dot the Pacific Northwest of the United States. The plates make up Earth's outer shell, called the lithosphere. (This includes the crust and uppermost part of the mantle.) Churning currents in the m ...
... comes to shaping the Earth. The tiny Juan de Fuca plate is largely responsible for the volcanoes that dot the Pacific Northwest of the United States. The plates make up Earth's outer shell, called the lithosphere. (This includes the crust and uppermost part of the mantle.) Churning currents in the m ...
Define and discuss on Isostatic Equilibrium Submitted by WWW
... because the material is eroded away, and it does not need to “ride” as low in the mantle. The eroded material is deposited as sediment on the adjacent thinner continental blocks, which increases their weight, and they then sink farther into the plastic asthenosphere. Areas that are tectonically stab ...
... because the material is eroded away, and it does not need to “ride” as low in the mantle. The eroded material is deposited as sediment on the adjacent thinner continental blocks, which increases their weight, and they then sink farther into the plastic asthenosphere. Areas that are tectonically stab ...
Critical Thinking - Leon County Schools
... cause of the quake? Which direction do you think the ground west of the fault moved? Explain. ...
... cause of the quake? Which direction do you think the ground west of the fault moved? Explain. ...
Plate Tectonics
... The theory that the Earth’s Crust and upper mantle (Lithosphere is broken up into 20 MOVING sections called plates. ...
... The theory that the Earth’s Crust and upper mantle (Lithosphere is broken up into 20 MOVING sections called plates. ...
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.