Penrose_Lesher - The University of Texas at Dallas
... High-Mg Magmatism Through Time: Implications for Plate Tectonics C.M. Lesher Mineral Exploration Research Centre Department of Earth Sciences Laurentian University, Sudbury, Ontario ...
... High-Mg Magmatism Through Time: Implications for Plate Tectonics C.M. Lesher Mineral Exploration Research Centre Department of Earth Sciences Laurentian University, Sudbury, Ontario ...
EARTH SCIENCE ACTIVITY: Finding Plates by
... continents lie. Plate size can vary greatly, from a few hundred to thousands of kilometers across. Plate thickness also varies greatly, ranging from less than 15 km for young oceanic lithosphere to about 200 km or more for ancient continental lithosphere. Like many features on the Earth’s surface, p ...
... continents lie. Plate size can vary greatly, from a few hundred to thousands of kilometers across. Plate thickness also varies greatly, ranging from less than 15 km for young oceanic lithosphere to about 200 km or more for ancient continental lithosphere. Like many features on the Earth’s surface, p ...
Oceanic Crust
... • It is also more dense than continental crust and considerably thinner averaging 5-10 km versus the average continental crust thickness of around 20 to 80 km. • Oceanic crust is coarsest at its bottom and is finer grained at its top. • About 60% of the Earth's surface is underlain by oceanic crust. ...
... • It is also more dense than continental crust and considerably thinner averaging 5-10 km versus the average continental crust thickness of around 20 to 80 km. • Oceanic crust is coarsest at its bottom and is finer grained at its top. • About 60% of the Earth's surface is underlain by oceanic crust. ...
Ch._8__10_notes_plate_tectonics_and_earths_surface.pptx
... • Plate Tectonics: theory that explains how the lithosphere is broken into moving plates that float on a layer of partly melted rock • Plate Boundary: area where 2 plates meet • Fault: at a fracture boundary where plates slide past each other. It is a break in the Earth’s crust ...
... • Plate Tectonics: theory that explains how the lithosphere is broken into moving plates that float on a layer of partly melted rock • Plate Boundary: area where 2 plates meet • Fault: at a fracture boundary where plates slide past each other. It is a break in the Earth’s crust ...
Geology Lecture 8 Plate Tectonics and Hotspots
... Hotspots are areas of magma upwelling from the mantle ...
... Hotspots are areas of magma upwelling from the mantle ...
Homework Due Friday, January 15, 2016 The Plate Tectonic Theory
... As you may have discovered, Earth is not just an ordinary planet in the solar system. Much like peeling an onion, Earth’s layers reveal answers to some interesting mysteries that have baffled scientists for years. Earth’s crust, the outermost layer, is not entirely one piece but instead is broken in ...
... As you may have discovered, Earth is not just an ordinary planet in the solar system. Much like peeling an onion, Earth’s layers reveal answers to some interesting mysteries that have baffled scientists for years. Earth’s crust, the outermost layer, is not entirely one piece but instead is broken in ...
3rd Rock Notes 2013
... continents. The PAC-NA plate boundary is MUCH more complex than this diagram shows. ...
... continents. The PAC-NA plate boundary is MUCH more complex than this diagram shows. ...
Earth - edl.io
... About 95% of volcanoes occur at subduction zones and mid-oceanic ridges About 5% occur at hot spots Produce ejecta (lava rock and/or ash) ...
... About 95% of volcanoes occur at subduction zones and mid-oceanic ridges About 5% occur at hot spots Produce ejecta (lava rock and/or ash) ...
Remote Sensing of the Earth`s Interior
... • lubrication for plate tectonics – Lower mantle • boundaries at 400 & 670 km • Pressure increases with depth • more dense mineral structures ...
... • lubrication for plate tectonics – Lower mantle • boundaries at 400 & 670 km • Pressure increases with depth • more dense mineral structures ...
plate boundaries
... • Plate tectonics - Earth’s surface composed thick plates that move • Intense geologic activity is concentrated at plate boundaries • Combination of continental drift and seafloor spreading hypotheses proposed in late 1960s ...
... • Plate tectonics - Earth’s surface composed thick plates that move • Intense geologic activity is concentrated at plate boundaries • Combination of continental drift and seafloor spreading hypotheses proposed in late 1960s ...
No Slide Title
... • Oceanic plate • Trench • Fore-arc ridge (melange) • Fore-arc basin • Continental plate with volcanic mountain range (e.g. Andes) ...
... • Oceanic plate • Trench • Fore-arc ridge (melange) • Fore-arc basin • Continental plate with volcanic mountain range (e.g. Andes) ...
Table 1. Plate Boundaries of an Unkn
... Table 4. Showing the Plate Boundaries in Cross Section On the figure below, draw a simple cross section of your plates in the subsurface. Use other figures in this chapter as a guide to the thicknesses of the crust and lithosphere and to the geometries typical for each type of plate boundary. Some f ...
... Table 4. Showing the Plate Boundaries in Cross Section On the figure below, draw a simple cross section of your plates in the subsurface. Use other figures in this chapter as a guide to the thicknesses of the crust and lithosphere and to the geometries typical for each type of plate boundary. Some f ...
science 6 topic 4 - Stillwater Christian School
... Scientists use volcanic and earthquake data to draw the conclusion that the earth is divided into these plates. At the edge of the Pacific Ocean and South America is where two plates are moving toward each other. ...
... Scientists use volcanic and earthquake data to draw the conclusion that the earth is divided into these plates. At the edge of the Pacific Ocean and South America is where two plates are moving toward each other. ...
Atmospheric Heating
... You have learned that plate tectonics is the theory that ::.lithosphere is divided into tectonic plates that move around :: top of the asthenosphere. What causes the motion of tecto:-: plates? Remember that the solid rock of the asthenosph=:= flows very slowly. This movement occurs because of chan.: ...
... You have learned that plate tectonics is the theory that ::.lithosphere is divided into tectonic plates that move around :: top of the asthenosphere. What causes the motion of tecto:-: plates? Remember that the solid rock of the asthenosph=:= flows very slowly. This movement occurs because of chan.: ...
Types of plate boundaries
... plate boundaries and explain the geologic processes that happen at each. PAGE 61 ...
... plate boundaries and explain the geologic processes that happen at each. PAGE 61 ...
Reading
... A transform boundary is a point where two plates slip past each other, moving in opposite directions. Along transform boundaries, the earth’s crust is neither created nor destroyed. Earthquakes occur frequently along these boundaries. The San Andreas Fault which causes many of the earthquakes in Cal ...
... A transform boundary is a point where two plates slip past each other, moving in opposite directions. Along transform boundaries, the earth’s crust is neither created nor destroyed. Earthquakes occur frequently along these boundaries. The San Andreas Fault which causes many of the earthquakes in Cal ...
History of Continental Drift, part 1
... 1. Continents were once joined. Therefore, they must have moved apart over time. 2. Contracting Earth theory was not consistent with the facts/evidence. Wegener proposed that continents were pushed by gravity from sun / moon ...
... 1. Continents were once joined. Therefore, they must have moved apart over time. 2. Contracting Earth theory was not consistent with the facts/evidence. Wegener proposed that continents were pushed by gravity from sun / moon ...
What is the Earth Made of? Let`s review the structure of the earth
... under immense pressure. So much pressure that, even though it is so hot, it is solid. The inner core is the hottest part of the Earth, and, at over 5000 degrees C, is about as hot as the surface of the sun. The deepest that anyone has ever drilled into the earth is about seven miles. So how can scie ...
... under immense pressure. So much pressure that, even though it is so hot, it is solid. The inner core is the hottest part of the Earth, and, at over 5000 degrees C, is about as hot as the surface of the sun. The deepest that anyone has ever drilled into the earth is about seven miles. So how can scie ...
![C7 Revision Earth and atmosphere[1].](http://s1.studyres.com/store/data/001217671_1-b9cc347117db8dff9935614904a55b09-300x300.png)
C7 Revision Earth and atmosphere[1].
... move. Plates normally move s………..….. (a few centimetres per year) but sudden release of strain energy causes e…………………………. Scientists cannot accurately predict when earthquakes and volcanic eruptions will occur because they can’t be certain ...
... move. Plates normally move s………..….. (a few centimetres per year) but sudden release of strain energy causes e…………………………. Scientists cannot accurately predict when earthquakes and volcanic eruptions will occur because they can’t be certain ...
C7 Revision Earth and Atmosphere
... move. Plates normally move s………..….. (a few centimetres per year) but sudden release of strain energy causes e…………………………. Scientists cannot accurately predict when earthquakes and volcanic eruptions will occur because they can’t be certain ...
... move. Plates normally move s………..….. (a few centimetres per year) but sudden release of strain energy causes e…………………………. Scientists cannot accurately predict when earthquakes and volcanic eruptions will occur because they can’t be certain ...
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.