Plate Tectonics Activity
... Note** Earthquakes commonly occur along the length of the subducted slab and compressional structures (folds and faults) are often associated with the compressional zone near the colliding plates. The subducted lithosphere consists of relatively low-melting-point rocks (sediments and oceanic crust f ...
... Note** Earthquakes commonly occur along the length of the subducted slab and compressional structures (folds and faults) are often associated with the compressional zone near the colliding plates. The subducted lithosphere consists of relatively low-melting-point rocks (sediments and oceanic crust f ...
17.3 Theory of plate Tectonics
... – Convergent boundaries are places where two tectonic plates are moving toward each other. – There are three types of convergent boundaries: 1. Oceanic crust converging with oceanic crust 2. Oceanic crust converging with continental crust 3. Continental crust converging and colliding with continenta ...
... – Convergent boundaries are places where two tectonic plates are moving toward each other. – There are three types of convergent boundaries: 1. Oceanic crust converging with oceanic crust 2. Oceanic crust converging with continental crust 3. Continental crust converging and colliding with continenta ...
A note on the gravitational field of the right rectangular prism
... numerical assessment of the metric information given by the database in terms of thickness and position of individual crustal layers with respect to sea level takes place by investigating correlations with the surface topography and by comparing those values with known theoretical approaches that de ...
... numerical assessment of the metric information given by the database in terms of thickness and position of individual crustal layers with respect to sea level takes place by investigating correlations with the surface topography and by comparing those values with known theoretical approaches that de ...
Ch. 9 Plate Tectonics: Study Guide
... 14. At what location is most lithosphere created? At what location is most lithosphere destroyed? ...
... 14. At what location is most lithosphere created? At what location is most lithosphere destroyed? ...
Continental Drift
... Plates consist of oceanic crust and upper mantle ► Continental Plates consist of continental crust and upper mantle Regions containing continental crust are up to 250 km thick Regions containing oceanic crust are up to 100 km thick ...
... Plates consist of oceanic crust and upper mantle ► Continental Plates consist of continental crust and upper mantle Regions containing continental crust are up to 250 km thick Regions containing oceanic crust are up to 100 km thick ...
Lab 2 Presentation slides
... Mid-Ocean Ridge and Rise System • Ocean floor mountain chains: – total length: ~ 75,000 km – width: 500 -1500 km – rugged slope with a central rift ...
... Mid-Ocean Ridge and Rise System • Ocean floor mountain chains: – total length: ~ 75,000 km – width: 500 -1500 km – rugged slope with a central rift ...
Rift Valleys (1)
... Cycle of mountain building: (1)Erosion- rocks of the land are weathered and eroded by rivers, waves, glaciers and wind. (2)Deposition- sedimentary and volcanic rocks are deposited on ocean floor where they accumulate. (3) Deformation- as the crust of the ocean floor slides under the continent in the ...
... Cycle of mountain building: (1)Erosion- rocks of the land are weathered and eroded by rivers, waves, glaciers and wind. (2)Deposition- sedimentary and volcanic rocks are deposited on ocean floor where they accumulate. (3) Deformation- as the crust of the ocean floor slides under the continent in the ...
Sea Levels - MSU Billings
... Types of continental margins Passive margins (= “Atlantic-type” margins) " They face the edges of diverging tectonic plates " Very little volcanic or earthquake activity Active margins (= “Pacific-type” margins) " Located near the edges of converging plates, where one plate subducts beneath another ...
... Types of continental margins Passive margins (= “Atlantic-type” margins) " They face the edges of diverging tectonic plates " Very little volcanic or earthquake activity Active margins (= “Pacific-type” margins) " Located near the edges of converging plates, where one plate subducts beneath another ...
Shortly after the Earth formed, heat released by colliding particles
... the Theory of Plate tectonics: • The lithosphere (crust & upper mantle) is broken into puzzle pieces called tectonic plates. • Oceanic plates are more dense than continental. • Therefore, oceanic plates will be subducted (pushed underneath) continental. ...
... the Theory of Plate tectonics: • The lithosphere (crust & upper mantle) is broken into puzzle pieces called tectonic plates. • Oceanic plates are more dense than continental. • Therefore, oceanic plates will be subducted (pushed underneath) continental. ...
Week 1
... ► After WWII some bathymetric data becam available (it was not public but it was available to some scientists. ► Radiometric dating was available ► Due to submarine navigation in WWII, bathimetry studies were done. ► Radar systems were used so militaries wanted to know more about magnetic field. ► P ...
... ► After WWII some bathymetric data becam available (it was not public but it was available to some scientists. ► Radiometric dating was available ► Due to submarine navigation in WWII, bathimetry studies were done. ► Radar systems were used so militaries wanted to know more about magnetic field. ► P ...
Types of Plate Boundaries
... thickens and crustal rocks are folded and faulted. Large amounts of uplift push rock high into the sky, forming mountain ranges such as the Alps or the ...
... thickens and crustal rocks are folded and faulted. Large amounts of uplift push rock high into the sky, forming mountain ranges such as the Alps or the ...
Ophiolites as Archives of Recycled Crustal Material Residing in the
... lamellae of diopside and coesite in some chromite grains suggests chromite crystallization depths around >380 km, near the mantle transition zone. The carbon isotopes and other features of the high-pressure and super-reduced mineral groups point to previously subducted surface material as their sour ...
... lamellae of diopside and coesite in some chromite grains suggests chromite crystallization depths around >380 km, near the mantle transition zone. The carbon isotopes and other features of the high-pressure and super-reduced mineral groups point to previously subducted surface material as their sour ...
Types of Plate Boundaries
... thickens and crustal rocks are folded and faulted. Large amounts of uplift push rock high into the sky, forming mountain ranges such as the Alps or the ...
... thickens and crustal rocks are folded and faulted. Large amounts of uplift push rock high into the sky, forming mountain ranges such as the Alps or the ...
Review sheet – Chapter 3 Understand that the Earth is density
... Know that the Earth is layered (contains a series of concentric layers) Understand that the compositional (based on chemical properties) layers of the Earth are the crust (thin, outermost), mantle (thick, middle layer), and core (densest, innermost layer) Understand that the Earth is further classif ...
... Know that the Earth is layered (contains a series of concentric layers) Understand that the compositional (based on chemical properties) layers of the Earth are the crust (thin, outermost), mantle (thick, middle layer), and core (densest, innermost layer) Understand that the Earth is further classif ...
Sample_reading_tasks
... two types of plate: continental and oceanic. However, these terms do not refer to actual continents and oceans but to different types of crust or rock. Continental crust is (3)_________ of older, lighter rock of granitic type. Oceanic crust (4) of much younger and denser rock of basaltic composition ...
... two types of plate: continental and oceanic. However, these terms do not refer to actual continents and oceans but to different types of crust or rock. Continental crust is (3)_________ of older, lighter rock of granitic type. Oceanic crust (4) of much younger and denser rock of basaltic composition ...
Phet Plate Tectonics Inquiry
... Now switch to the “Plate Motion” Tab. Always view “Both”, “Show Labels”, and “Show Seawater” (when possible). Click on “Manual Mode”. Complete the table below using only Manual Mode. *Note: To see the same action happen again click “Rewind” to change the plates completely click “New Crust”. Example ...
... Now switch to the “Plate Motion” Tab. Always view “Both”, “Show Labels”, and “Show Seawater” (when possible). Click on “Manual Mode”. Complete the table below using only Manual Mode. *Note: To see the same action happen again click “Rewind” to change the plates completely click “New Crust”. Example ...
Name: Section: Date: Plate Tectonics Learning Objectives
... Now switch to the “Plate Motion” Tab. Always view “Both”, “Show Labels”, and “Show Seawater” (when possible). Click on “Manual Mode”. Complete the table below using only Manual Mode. *Note: To see the same action happen again click “Rewind” to change the plates completely click “New Crust”. Example ...
... Now switch to the “Plate Motion” Tab. Always view “Both”, “Show Labels”, and “Show Seawater” (when possible). Click on “Manual Mode”. Complete the table below using only Manual Mode. *Note: To see the same action happen again click “Rewind” to change the plates completely click “New Crust”. Example ...
Document
... • It provide an explanation for continental drift • mid-oceanic ridge is formed • Evidence : Heat flow with minerals, young ocean floor and palaeomagnetic evidence ...
... • It provide an explanation for continental drift • mid-oceanic ridge is formed • Evidence : Heat flow with minerals, young ocean floor and palaeomagnetic evidence ...
Sea-Floor Spreading
... Sonar: a device that bounces sound waves off underwater objects and then records the echoes of these sound waves. Scientists used this to map the ocean floor. The time it takes for the echo to arrive indicates the distance from you to an object. Mid-ocean ridges curve along the sea floor and ...
... Sonar: a device that bounces sound waves off underwater objects and then records the echoes of these sound waves. Scientists used this to map the ocean floor. The time it takes for the echo to arrive indicates the distance from you to an object. Mid-ocean ridges curve along the sea floor and ...
Open File - Earth Science > Home
... to lower depths. These dead organisms decay and release nutrients back into the deep water. Nutrients can return to the surface through a process called upwelling. Upwelling is the movement of deep, cold, nutrient-rich water to the surface. When wind blows along a coastline, surface water moves away ...
... to lower depths. These dead organisms decay and release nutrients back into the deep water. Nutrients can return to the surface through a process called upwelling. Upwelling is the movement of deep, cold, nutrient-rich water to the surface. When wind blows along a coastline, surface water moves away ...
Plate Tectonics - My Teacher Pages
... liquid by the circulation of currents from one region to another Convection cell is a circular-moving loop of matter (gas or liquid) involved in convection movement ...
... liquid by the circulation of currents from one region to another Convection cell is a circular-moving loop of matter (gas or liquid) involved in convection movement ...
Power Point Presentation
... continents and consist of massive wedges of sediment eroded from the land and deposited along the continental edge. The Continental Margin can be divided into three parts: the Continental shelf, the Continental slope, and the Continental rise. ...
... continents and consist of massive wedges of sediment eroded from the land and deposited along the continental edge. The Continental Margin can be divided into three parts: the Continental shelf, the Continental slope, and the Continental rise. ...
Moving Plates- Spreading and Colliding
... In plate tectonics, a divergent boundary is a linear feature that exists between two tectonic plates that are moving away from each other. These areas can form in the middle of continents or on the ocean floor. As the plates pull apart, hot molten material can rise up this newly formed pathway to th ...
... In plate tectonics, a divergent boundary is a linear feature that exists between two tectonic plates that are moving away from each other. These areas can form in the middle of continents or on the ocean floor. As the plates pull apart, hot molten material can rise up this newly formed pathway to th ...
Abyssal plain
An abyssal plain is an underwater plain on the deep ocean floor, usually found at depths between 3000 and 6000 m. Lying generally between the foot of a continental rise and a mid-ocean ridge, abyssal plains cover more than 50% of the Earth’s surface. They are among the flattest, smoothest and least explored regions on Earth. Abyssal plains are key geologic elements of oceanic basins (the other elements being an elevated mid-ocean ridge and flanking abyssal hills). In addition to these elements, active oceanic basins (those that are associated with a moving plate tectonic boundary) also typically include an oceanic trench and a subduction zone.Abyssal plains were not recognized as distinct physiographic features of the sea floor until the late 1940s and, until very recently, none had been studied on a systematic basis. They are poorly preserved in the sedimentary record, because they tend to be consumed by the subduction process. The creation of the abyssal plain is the end result of spreading of the seafloor (plate tectonics) and melting of the lower oceanic crust. Magma rises from above the asthenosphere (a layer of the upper mantle) and as this basaltic material reaches the surface at mid-ocean ridges it forms new oceanic crust. This is constantly pulled sideways by spreading of the seafloor. Abyssal plains result from the blanketing of an originally uneven surface of oceanic crust by fine-grained sediments, mainly clay and silt. Much of this sediment is deposited by turbidity currents that have been channelled from the continental margins along submarine canyons down into deeper water. The remainder of the sediment is composed chiefly of pelagic sediments. Metallic nodules are common in some areas of the plains, with varying concentrations of metals, including manganese, iron, nickel, cobalt, and copper. These nodules may provide a significant resource for future mining ventures.Owing in part to their vast size, abyssal plains are currently believed to be a major reservoir of biodiversity. The abyss also exerts significant influence upon ocean carbon cycling, dissolution of calcium carbonate, and atmospheric CO2 concentrations over timescales of 100–1000 years. The structure and function of abyssal ecosystems are strongly influenced by the rate of flux of food to the seafloor and the composition of the material that settles. Factors such as climate change, fishing practices, and ocean fertilization are expected to have a substantial effect on patterns of primary production in the euphotic zone. This will undoubtedly impact the flux of organic material to the abyss in a similar manner and thus have a profound effect on the structure, function and diversity of abyssal ecosystems.