Warm-Up # 46 - East Hanover Schools Online
... A. What theory of explains why the seafloor has both trenches and mid-ocean ridges? Seafloor spreading B. Evidence that tectonic plates are being created younger at divergent boundaries is that _______ rocks are found at the mid-ocean ridges and older ______________rocks are found further away. ...
... A. What theory of explains why the seafloor has both trenches and mid-ocean ridges? Seafloor spreading B. Evidence that tectonic plates are being created younger at divergent boundaries is that _______ rocks are found at the mid-ocean ridges and older ______________rocks are found further away. ...
Earth Formation
... other part of the Earth‘s structure. It is mainly because this is the layer that we live on and it the region most easily within our reach. Thought it is only the “peel’ of the earth we have been able to learn a lot about the Earth from investigating it. We know how old the earth is by dating the ro ...
... other part of the Earth‘s structure. It is mainly because this is the layer that we live on and it the region most easily within our reach. Thought it is only the “peel’ of the earth we have been able to learn a lot about the Earth from investigating it. We know how old the earth is by dating the ro ...
The Inside of Earth: Deep-Earth Science from the Top Down
... down into the mantle. Because the plate was at Earth’s surface, it should be cold when it sinks, and seismic tomography can detect these cold regions (which we usually indicate as blue) going down to 600 kilometers. Numerical correlations show that these slabs may end up in the middle mantle, the me ...
... down into the mantle. Because the plate was at Earth’s surface, it should be cold when it sinks, and seismic tomography can detect these cold regions (which we usually indicate as blue) going down to 600 kilometers. Numerical correlations show that these slabs may end up in the middle mantle, the me ...
Final Exam Practice Quiz 1. What is the chief source of energy for
... c) Rift apart d) Move under each other 3. The San Andreas fault between the Pacific and North American plates is an example of a: a) Continent-continent convergent plate boundary b) Transform fault boundary c) Ocean-continent convergent plate boundary d) Divergent plate boundary 4. What happens when ...
... c) Rift apart d) Move under each other 3. The San Andreas fault between the Pacific and North American plates is an example of a: a) Continent-continent convergent plate boundary b) Transform fault boundary c) Ocean-continent convergent plate boundary d) Divergent plate boundary 4. What happens when ...
Dating the Growth of Oceanic Crust at a Slow
... earlier intrusive bodies, which were temporarily trapped beneath the rift valley before being transported away as part of the heterogeneous crust that forms Atlantis Bank. Although this process may account for some of the younger anomalously old ages, it is difficult to envision portions of the lowe ...
... earlier intrusive bodies, which were temporarily trapped beneath the rift valley before being transported away as part of the heterogeneous crust that forms Atlantis Bank. Although this process may account for some of the younger anomalously old ages, it is difficult to envision portions of the lowe ...
ch07
... 9) List two types of actual rock evidence used by Wegener to show that Pangea existed about 200 million years ago. 10) Is Wegener’s suggestion that the continents move by plowing their way through the ocean floor supported by modern data? Your graded answers will be handed back to you next week. Car ...
... 9) List two types of actual rock evidence used by Wegener to show that Pangea existed about 200 million years ago. 10) Is Wegener’s suggestion that the continents move by plowing their way through the ocean floor supported by modern data? Your graded answers will be handed back to you next week. Car ...
Document
... tension built up along Earth’s plates is released causing one plate to slip past another? © The Science Duo ...
... tension built up along Earth’s plates is released causing one plate to slip past another? © The Science Duo ...
Tectonics of Io
... In reality, it is probably a combination of the stresses that drives crustal uplift, although unless the lithosphere is extremely thin or resurfacing rates are much slower than estimated, subsidence-related compressional stress plays a larger role than thermal expansion. (Figure from Jaeger et al. 2 ...
... In reality, it is probably a combination of the stresses that drives crustal uplift, although unless the lithosphere is extremely thin or resurfacing rates are much slower than estimated, subsidence-related compressional stress plays a larger role than thermal expansion. (Figure from Jaeger et al. 2 ...
The Restless Earth
... Ocean trenches form at destructive subduction margins (oceanic plate sinks beneath continental plate e.g. Pacific Plate and North American Plate) Young fold mountains form at both destructive subduction margins and destructive collision margins (where two continental plates collide e.g. African plat ...
... Ocean trenches form at destructive subduction margins (oceanic plate sinks beneath continental plate e.g. Pacific Plate and North American Plate) Young fold mountains form at both destructive subduction margins and destructive collision margins (where two continental plates collide e.g. African plat ...
graham cracker plate tectonics - brooke
... Purpose: 1) Identify forces that shape features of the Earth 2) Predict land features resulting from gradual changes 3) Represent the natural world using models and identify their limitations Background Information: Plate boundaries are found at the edge of the plates. There are three types: Converg ...
... Purpose: 1) Identify forces that shape features of the Earth 2) Predict land features resulting from gradual changes 3) Represent the natural world using models and identify their limitations Background Information: Plate boundaries are found at the edge of the plates. There are three types: Converg ...
Driving the Earth machine?
... plumes—is no better than the correla–2 tion with the low–wave speed regions Top or bottom? Seismic anomalies in the asthenosphere (A) and at the base of the mantle, just above the core (B); the anomalies beneath the asthenosphere (15). are relative to a one-dimensional reference model. The correlati ...
... plumes—is no better than the correla–2 tion with the low–wave speed regions Top or bottom? Seismic anomalies in the asthenosphere (A) and at the base of the mantle, just above the core (B); the anomalies beneath the asthenosphere (15). are relative to a one-dimensional reference model. The correlati ...
Wegener`s Hypothesis, continued
... Sea-Floor Spreading, continued • In the late 1950’s geologist Harry Hess proposed that the valley at the center of the mid-ocean ridge was a crack, or rift, in Earth’s crust. • As the ocean floor moves away from the ridge, molten rock, or magma, rises to fill the crack. • Hess suggested that if the ...
... Sea-Floor Spreading, continued • In the late 1950’s geologist Harry Hess proposed that the valley at the center of the mid-ocean ridge was a crack, or rift, in Earth’s crust. • As the ocean floor moves away from the ridge, molten rock, or magma, rises to fill the crack. • Hess suggested that if the ...
What Are Earthquakes?
... lithosphere to break up into fault blocks. • These blocks thrust over one another as the plates move. • Two types of earthquakes may occur. • Between the two plates & • Inside the down going plate. ...
... lithosphere to break up into fault blocks. • These blocks thrust over one another as the plates move. • Two types of earthquakes may occur. • Between the two plates & • Inside the down going plate. ...
Mantle convection results from plate tectonics – Fresh
... original concept of continental drift proposed in 1912 by Alfred Wegner, and ideas of sea-floor spreading advanced by Arthur Holmes in 1928. Subsequent work by British, American, Canadian and French scientists led to a full-fledged plate tectonic theory in 1968. According to this theory, the outer l ...
... original concept of continental drift proposed in 1912 by Alfred Wegner, and ideas of sea-floor spreading advanced by Arthur Holmes in 1928. Subsequent work by British, American, Canadian and French scientists led to a full-fledged plate tectonic theory in 1968. According to this theory, the outer l ...
Late - to post-orogenic tectonic processes and exhumation
... From late to post orogenic tectonics in continental collision zones to rifts The end of a Wilson cycle does not mark the end of the tectonic activity in a mountainbelt. In many orogenic belts high-grade rocks formed by the crustal-thickening during collision get quickly exhumed. In many instances t ...
... From late to post orogenic tectonics in continental collision zones to rifts The end of a Wilson cycle does not mark the end of the tectonic activity in a mountainbelt. In many orogenic belts high-grade rocks formed by the crustal-thickening during collision get quickly exhumed. In many instances t ...
GG 101 Fall 2010 Exam 1 September 23, 2010
... B) In a tropical rainforest, the forest-floor litter is often burned during the dry season. C) Less humus is produced in the cool, temperate forest but the rate of decay and oxidation is slower than in a tropical rainforest. D) No humus is produced in a tropical rainforest because the B horizon is p ...
... B) In a tropical rainforest, the forest-floor litter is often burned during the dry season. C) Less humus is produced in the cool, temperate forest but the rate of decay and oxidation is slower than in a tropical rainforest. D) No humus is produced in a tropical rainforest because the B horizon is p ...
Figure 1. The composition of the earth normalized to
... elements such as Si/Mg-Al/Mg. Since certain refractory elements (Mg, Ca, Al, etc.) do not partition into the earth’s core, we can assume that their bulk earth ratios are equivalent to their ratios in the primitive mantle. The bulk earth falls along the carbonaceous chondrite lines for these elements ...
... elements such as Si/Mg-Al/Mg. Since certain refractory elements (Mg, Ca, Al, etc.) do not partition into the earth’s core, we can assume that their bulk earth ratios are equivalent to their ratios in the primitive mantle. The bulk earth falls along the carbonaceous chondrite lines for these elements ...
Lecture 10: Introduction to Earth Structure and Energetics
... Example: what is the temperature at the base of 40-km thick granitic crust with a geothermal gradient 15 oC/km? Answer: T = 40 km x 15 oC/km = 600 oC This temperature is not high enough to melt crustal rocks. ...
... Example: what is the temperature at the base of 40-km thick granitic crust with a geothermal gradient 15 oC/km? Answer: T = 40 km x 15 oC/km = 600 oC This temperature is not high enough to melt crustal rocks. ...
Plate and Volcano Information
... Island chains such as Japan and New Zealand have been created by plate collisions. Because the rocks that melt differ, there are different types of volcanoes. Shield volcanoes form from magma that is not under much pressure. It oozes out of the ground producing a wide volcano that is not very tall. ...
... Island chains such as Japan and New Zealand have been created by plate collisions. Because the rocks that melt differ, there are different types of volcanoes. Shield volcanoes form from magma that is not under much pressure. It oozes out of the ground producing a wide volcano that is not very tall. ...
Deep Earth Volatiles Cycle: processes, fluxes and deep mantle
... the largest volatiles reservoir – has outer-‐rise due to bending-‐related faulting and subsequent profound implications on the dynamics dehydration at upper mantle depths. From (Faccenda et al. and the evolution of our planet, as 2012 ...
... the largest volatiles reservoir – has outer-‐rise due to bending-‐related faulting and subsequent profound implications on the dynamics dehydration at upper mantle depths. From (Faccenda et al. and the evolution of our planet, as 2012 ...
Forces In The Earths Crust
... of the earth. Continental crust is relatively thick and mostly very old. Oceanic crust is relatively thin and is always geologically very young. ...
... of the earth. Continental crust is relatively thick and mostly very old. Oceanic crust is relatively thin and is always geologically very young. ...
Non-Trad PA - Layers and Tectonics of Earth
... The students will have already learned about the layers of the earth, plate tectonics, and the causes and typical locations of major geologic events related to tectonic movement. Students will be assessed on their knowledge of Earth’s internal structure and how different layers of the internal s ...
... The students will have already learned about the layers of the earth, plate tectonics, and the causes and typical locations of major geologic events related to tectonic movement. Students will be assessed on their knowledge of Earth’s internal structure and how different layers of the internal s ...
Poster on PPT
... crustal plates and how they interact. Since these plates move, they may hit each other, move away from each other, or slide across each other. As it relates to the Pacific Ring of Fire, convergent plate movements are the most applicable to understanding the disasters in this part of the world. Conve ...
... crustal plates and how they interact. Since these plates move, they may hit each other, move away from each other, or slide across each other. As it relates to the Pacific Ring of Fire, convergent plate movements are the most applicable to understanding the disasters in this part of the world. Conve ...
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.