Practice20m
... 3) Which of the following is NOT true concerning the Eons of the Precambrian? (a) Their rocks are impossible to correlate by any means. (b) Their intervals were based upon similarities in tectonic activity and rock composition. (c) The oldest interval was defined last. 4) The one location where Hade ...
... 3) Which of the following is NOT true concerning the Eons of the Precambrian? (a) Their rocks are impossible to correlate by any means. (b) Their intervals were based upon similarities in tectonic activity and rock composition. (c) The oldest interval was defined last. 4) The one location where Hade ...
Austin Myslinski
... Between the indicated points on the image, there is roughly 760 miles between the two. 1. What are the tectonic boundaries for each of these two points? ...
... Between the indicated points on the image, there is roughly 760 miles between the two. 1. What are the tectonic boundaries for each of these two points? ...
Sea-Floor Spreading - Zion Central Middle School
... under-water objects and then records the echoes of these sound waves. The time it takes for the echo to arrive indicates the distance to the object. ...
... under-water objects and then records the echoes of these sound waves. The time it takes for the echo to arrive indicates the distance to the object. ...
Chapter 9 Planetary Geology: What are terrestrial planets like on the
... thick continental crust • Dating of seafloor shows it is usually quite young ...
... thick continental crust • Dating of seafloor shows it is usually quite young ...
Seismic reflection image of the Great Sumatra
... magnitude and long return period of the 26 December 2004 event, (> 500 yrs, possibly 1000 yrs or more), longer than usually observed for M ~ 8 earthquakes on fast subduction zone segments, including in central Sumatra29. If the mantle megathrust geometry is correct, models of accretionary wedge mech ...
... magnitude and long return period of the 26 December 2004 event, (> 500 yrs, possibly 1000 yrs or more), longer than usually observed for M ~ 8 earthquakes on fast subduction zone segments, including in central Sumatra29. If the mantle megathrust geometry is correct, models of accretionary wedge mech ...
Seismic re¯ection image revealing offset of Andean subduction
... shotgather from a Quebrada Blanca mine blast (Fig. 2) shows that the upper crust down to 12 s two-way travel time (TWTT; ,35 km depth) is devoid of re¯ections. From 12 to 30 s TWTT (,35± 100 km depth), prominent re¯ective structures can be discerned: for example, the `Quebrada Blanca bright spot' an ...
... shotgather from a Quebrada Blanca mine blast (Fig. 2) shows that the upper crust down to 12 s two-way travel time (TWTT; ,35 km depth) is devoid of re¯ections. From 12 to 30 s TWTT (,35± 100 km depth), prominent re¯ective structures can be discerned: for example, the `Quebrada Blanca bright spot' an ...
File - Islamic Center Of Northland
... contains calcium, aluminum, and garnet, which is a complex aluminum-bearing silicate mineral. This layer is dense when cold because of the garnet. It is buoyant when hot because these minerals melt easily to form basalt which can then rise through the upper layers as magma. (6) Upper Mantle: 10.3% o ...
... contains calcium, aluminum, and garnet, which is a complex aluminum-bearing silicate mineral. This layer is dense when cold because of the garnet. It is buoyant when hot because these minerals melt easily to form basalt which can then rise through the upper layers as magma. (6) Upper Mantle: 10.3% o ...
Earth`s Structure and Processes Test 1 1. What are the only things
... not travel through this area. Using this information, what could they infer about the type of material in this area? The area is composed of gravel. The area is composed of solid iron. The area is composed of solid rock. The area is composed of molten rock. ...
... not travel through this area. Using this information, what could they infer about the type of material in this area? The area is composed of gravel. The area is composed of solid iron. The area is composed of solid rock. The area is composed of molten rock. ...
mass the amount of matter an object has weight
... a line of mountains that forms on each side of the spreading center. the deep area in between the ocean ridges a long, narrow and steep depression that forms on the ocean ...
... a line of mountains that forms on each side of the spreading center. the deep area in between the ocean ridges a long, narrow and steep depression that forms on the ocean ...
Continental Margins and Ocean Basins
... Continents are made of thick granite rock, while the deep seafloor is made of basalt The transition of basalt marks the “true edge” of the continent Divides ocean floor into 2 major provinces Continental Margin – the submerged outer edge of the ...
... Continents are made of thick granite rock, while the deep seafloor is made of basalt The transition of basalt marks the “true edge” of the continent Divides ocean floor into 2 major provinces Continental Margin – the submerged outer edge of the ...
File - GEOLOGY ROCKS!
... Result: Major rivers concentrate creatingerosional major rivers debris in thebuilding: oceans at thethat continental margins deposit erosional 1. Mountain debris alongback the coast of two Andcollision plate collisions weld that debris into or more crustal plates the continent as mountains ...
... Result: Major rivers concentrate creatingerosional major rivers debris in thebuilding: oceans at thethat continental margins deposit erosional 1. Mountain debris alongback the coast of two Andcollision plate collisions weld that debris into or more crustal plates the continent as mountains ...
Graham Cracker Model of Plate Tectonics
... 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 in the mant ...
... 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 in the mant ...
Earth Interior/ Mantle Convection
... F6: friction between the subducting slab and the overlying lithosphere F7: tendency of the oceanic plate to sink as it cools and becomes denser (we can call that negative buoyancy) ...
... F6: friction between the subducting slab and the overlying lithosphere F7: tendency of the oceanic plate to sink as it cools and becomes denser (we can call that negative buoyancy) ...
MS Word
... Relative Age dating: Stratigraphic principles Absolute age dating: Half-life, geologically useful geologic isotopes, assumptions underlying the use of absolute age dating, what types of rocks are used. How isotopic dating is used to constrain the geologic time scale. Paleomagnetism: what typ ...
... Relative Age dating: Stratigraphic principles Absolute age dating: Half-life, geologically useful geologic isotopes, assumptions underlying the use of absolute age dating, what types of rocks are used. How isotopic dating is used to constrain the geologic time scale. Paleomagnetism: what typ ...
Earthquake and Volcano Activity: Webquest
... plates, and there is massive _________________on the fault lines. This intense pressure resulting from energy build up causes the fault lines give way, and plates move over, against or apart from each other. iv. There is an __________________ at this point. In the form of _____________________ (like ...
... plates, and there is massive _________________on the fault lines. This intense pressure resulting from energy build up causes the fault lines give way, and plates move over, against or apart from each other. iv. There is an __________________ at this point. In the form of _____________________ (like ...
Plate Tectonics, Volcano and Earthquake Webquest
... plates, and there is massive _________________on the fault lines. This intense pressure resulting from energy build up causes the fault lines give way, and plates move over, against or apart from each other. iv. There is an __________________ at this point. In the form of _____________________ (like ...
... plates, and there is massive _________________on the fault lines. This intense pressure resulting from energy build up causes the fault lines give way, and plates move over, against or apart from each other. iv. There is an __________________ at this point. In the form of _____________________ (like ...
FREE Sample Here
... whereas the oldest continental crust is approximately 4 billion years old. Fossil evidence and the thickness of sediments overlying the oceanic crust further support and confirm that ocean basins are recent geologic features. Plate tectonic theory became widely accepted by the 1970s because the evid ...
... whereas the oldest continental crust is approximately 4 billion years old. Fossil evidence and the thickness of sediments overlying the oceanic crust further support and confirm that ocean basins are recent geologic features. Plate tectonic theory became widely accepted by the 1970s because the evid ...
On the move - Discovering Antarctica
... On the move Each picture below shows a stage in the break-up of the super-continent, Gondwana that began 180 million years ago. Use what you already know to add captions to the pictures to describe what is happening. If you are a bit stuck on what to write, you could use these captions to get starte ...
... On the move Each picture below shows a stage in the break-up of the super-continent, Gondwana that began 180 million years ago. Use what you already know to add captions to the pictures to describe what is happening. If you are a bit stuck on what to write, you could use these captions to get starte ...
Chapter 1: Planet Ocean: A Historical Perspective
... KEY QUESTIONS As you navigate this chapter, look for the answers to these key questions: • What is the nature of scientific inquiry? • What are the four principal oceans on Earth? • Where is the deepest part of the oceans, and have humans ever visited there? ...
... KEY QUESTIONS As you navigate this chapter, look for the answers to these key questions: • What is the nature of scientific inquiry? • What are the four principal oceans on Earth? • Where is the deepest part of the oceans, and have humans ever visited there? ...
HS Plate Tectonics
... composition is granite, which is much less dense than the mafic rocks of the oceanic crust (Figure 1.6). Because it is thick and has relatively low density, continental crust rises higher on the mantle than oceanic crust, which sinks into the mantle to form basins. When filled with water, these basi ...
... composition is granite, which is much less dense than the mafic rocks of the oceanic crust (Figure 1.6). Because it is thick and has relatively low density, continental crust rises higher on the mantle than oceanic crust, which sinks into the mantle to form basins. When filled with water, these basi ...
Pangaea CC Reading
... difficult'to'ignore.'The'Eastern'coast'of'South' America'seems'to'fit'perfectly,'almost'like'a'puzzle,' into'the'Western'coast'of'Africa.'At'the'same'time,' North'America'can'be'rotated'slightly,'and'made'to' fit'comfortably'next'to'Europe,'and'Asia.'' These'clues'have'lead'geologists'and'other' sci ...
... difficult'to'ignore.'The'Eastern'coast'of'South' America'seems'to'fit'perfectly,'almost'like'a'puzzle,' into'the'Western'coast'of'Africa.'At'the'same'time,' North'America'can'be'rotated'slightly,'and'made'to' fit'comfortably'next'to'Europe,'and'Asia.'' These'clues'have'lead'geologists'and'other' sci ...
Plate Tectonics II
... regions of the ocean floor are elongate trenches found along the margins of some, but not all, ocean basins. ...
... regions of the ocean floor are elongate trenches found along the margins of some, but not all, ocean basins. ...
When did Making Mountains the Modern Way Begin?
... When did Making Mountains the Modern Way Begin? The process of mountain building and major structural change on Earth underwent a significant change in style in the deep geological past. Early Earth was hotter and as a result the planet’s outer lithospheric rock layer was thinner and weaker, consequ ...
... When did Making Mountains the Modern Way Begin? The process of mountain building and major structural change on Earth underwent a significant change in style in the deep geological past. Early Earth was hotter and as a result the planet’s outer lithospheric rock layer was thinner and weaker, consequ ...
Plate tectonics - Geological Society of India
... spreading, was formulated in the mid-1960s by J. Tuzo Wilson. This theory holds that the Earth's upper shell, or lithosphere, consists of six major and 22 or so minor rigid slabs called plates. The thickness of each of these plates extends to a depth of roughly 80 to 150 kilometers. These plates mov ...
... spreading, was formulated in the mid-1960s by J. Tuzo Wilson. This theory holds that the Earth's upper shell, or lithosphere, consists of six major and 22 or so minor rigid slabs called plates. The thickness of each of these plates extends to a depth of roughly 80 to 150 kilometers. These plates mov ...
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.