Oceanic Crust
... consist of liquid like magma that allows the crust to float on top like ice on a lake. ...
... consist of liquid like magma that allows the crust to float on top like ice on a lake. ...
Plate Tectonics Notes
... of heat from the deep earth. - Where does the heat source come from? Mostly from the decay of radioisotopes in the earth’s interior. - About 94% of the heat comes from the Mantle, and about 6% from the core material - The release of heat (=energy) from the mantle causes volcanoes - Core heat causes ...
... of heat from the deep earth. - Where does the heat source come from? Mostly from the decay of radioisotopes in the earth’s interior. - About 94% of the heat comes from the Mantle, and about 6% from the core material - The release of heat (=energy) from the mantle causes volcanoes - Core heat causes ...
Plate Tectonics and Sedimentation: Where do sediments
... crust heated from below, thermally expands and thins creation of tension fractures (= normal faults) extension causes collapse of thinned crust (= horsts & grabens) creation of long, narrow, fault-bounded central rift valley thick sequences of continental deposits due to rapid subsidence and high re ...
... crust heated from below, thermally expands and thins creation of tension fractures (= normal faults) extension causes collapse of thinned crust (= horsts & grabens) creation of long, narrow, fault-bounded central rift valley thick sequences of continental deposits due to rapid subsidence and high re ...
File
... • Scientists found a close link between earthquakes and plate boundaries. • When the depths of earthquakes and their depth within a trench are plotted, a pattern emerges. •Deep earthquakes are found in trenches (evidence for sinking plates). •Shallow earthquakes are found in oceanic ridges. (evidenc ...
... • Scientists found a close link between earthquakes and plate boundaries. • When the depths of earthquakes and their depth within a trench are plotted, a pattern emerges. •Deep earthquakes are found in trenches (evidence for sinking plates). •Shallow earthquakes are found in oceanic ridges. (evidenc ...
ANSWER KEY Name - Riverdale Middle School
... a.) Name the feature shown at A. Mid-Ocean Ridge b.) What is occurring at B? Sea-floor spreading c.) What process is shown occurring at C, and why does it occur? Subduction, because the ocean floor is so much heavier (denser) than the land ...
... a.) Name the feature shown at A. Mid-Ocean Ridge b.) What is occurring at B? Sea-floor spreading c.) What process is shown occurring at C, and why does it occur? Subduction, because the ocean floor is so much heavier (denser) than the land ...
Tectonic History - Illinois State Geological Survey
... Plate tectonic theory provides insight into the driving forces that have shaped the long and varied geological history of Illinois. In brief, the theory recognizes that the upper part of the Earth’s crust is composed of rigid tectonic plates (slabs) that slide laterally over a layer of weaker, visco ...
... Plate tectonic theory provides insight into the driving forces that have shaped the long and varied geological history of Illinois. In brief, the theory recognizes that the upper part of the Earth’s crust is composed of rigid tectonic plates (slabs) that slide laterally over a layer of weaker, visco ...
Plate Boundaries
... Subduction zone Trench Area of melting Area of volcanism Arrows indicating direction of plate movement ...
... Subduction zone Trench Area of melting Area of volcanism Arrows indicating direction of plate movement ...
1. Earth Science a. Branches i. Geology—study of rocks, minerals
... i. Most of Earth is mantle—rocky shell 2900 km thick ii. Crust has less iron, more silica—thin veneer iii. Core is mostly metal—iron and nickel, ~3500 km radius b. Physical properties of these zones change with depth, due to increase in pressure at greater distances from surface i. Lithosphere is th ...
... i. Most of Earth is mantle—rocky shell 2900 km thick ii. Crust has less iron, more silica—thin veneer iii. Core is mostly metal—iron and nickel, ~3500 km radius b. Physical properties of these zones change with depth, due to increase in pressure at greater distances from surface i. Lithosphere is th ...
Name: Date: Period: ______
... move and shape Earth’s surface. They move in different directions and at different rates relative to one another, and they interact with one another at their boundaries. Types of Plate Boundaries Divergent Boundary: two tectonic plates moving apart from each other (ocean ridge or rift-valley). o ...
... move and shape Earth’s surface. They move in different directions and at different rates relative to one another, and they interact with one another at their boundaries. Types of Plate Boundaries Divergent Boundary: two tectonic plates moving apart from each other (ocean ridge or rift-valley). o ...
Investigation B, Ocean Bottom Topography
... Americas. The east coasts of North and South America, with their generally broad continental margins as schematically shown to the right in Figure B1, are tectonically [(passive)(active)]. The west coasts of the Americas, with relatively narrow continental margins as shown to the left in the same fi ...
... Americas. The east coasts of North and South America, with their generally broad continental margins as schematically shown to the right in Figure B1, are tectonically [(passive)(active)]. The west coasts of the Americas, with relatively narrow continental margins as shown to the left in the same fi ...
Stop the Continent, I Want to Get Off! - PLC-METS
... 2) Oceanic-Continental Convergence • Oceanic Crust is more dense than Continental Crust because: • Many of the minerals in Oceanic Crust are inherently more dense. • Erosion, weathering, and other surficial processes leave pore space (filled with gasses or fluids) in the rocks, decreasing their den ...
... 2) Oceanic-Continental Convergence • Oceanic Crust is more dense than Continental Crust because: • Many of the minerals in Oceanic Crust are inherently more dense. • Erosion, weathering, and other surficial processes leave pore space (filled with gasses or fluids) in the rocks, decreasing their den ...
From rifting to subduction: the role of inheritance in the Wilson Cycle
... inferring continuity from divergence to convergence and that continental rifting takes place along former suture zones. This view questions the role of inherited structures at each stage of the Wilson Cycle. Using the 3D thermo-mechanical code, I3ELVIS (Gerya and Yuen 2007) we present a high-resolut ...
... inferring continuity from divergence to convergence and that continental rifting takes place along former suture zones. This view questions the role of inherited structures at each stage of the Wilson Cycle. Using the 3D thermo-mechanical code, I3ELVIS (Gerya and Yuen 2007) we present a high-resolut ...
4th Nine Weeks Benchmark
... 16. In what zone are hydrothermal vents located? 17. In the open ocean, algae live only in the ________________________ zone. 18. Organisms in the deep ocean that produce their own light are called ____________________________. 19. A nearly flat region of the ocean floor, covered with thick layers o ...
... 16. In what zone are hydrothermal vents located? 17. In the open ocean, algae live only in the ________________________ zone. 18. Organisms in the deep ocean that produce their own light are called ____________________________. 19. A nearly flat region of the ocean floor, covered with thick layers o ...
4th Nine Weeks Benchmark
... 16. In what zone are hydrothermal vents located? 17. In the open ocean, algae live only in the ________________________ zone. 18. Organisms in the deep ocean that produce their own light are called ____________________________. 19. A nearly flat region of the ocean floor, covered with thick layers o ...
... 16. In what zone are hydrothermal vents located? 17. In the open ocean, algae live only in the ________________________ zone. 18. Organisms in the deep ocean that produce their own light are called ____________________________. 19. A nearly flat region of the ocean floor, covered with thick layers o ...
MS1_PNT_Geologyppt_V01
... and widening the seafloor. Mid-ocean ridges and rift valleys mark divergent boundaries. ...
... and widening the seafloor. Mid-ocean ridges and rift valleys mark divergent boundaries. ...
File
... [Extension] Read the information below and answer the questions in sentences in your jotter. Oceanic Lithosphere The rigid, outermost layer of the Earth comprising the crust and upper mantle is called the lithosphere. New oceanic lithosphere forms through volcanism in the form of fissures at mid-oc ...
... [Extension] Read the information below and answer the questions in sentences in your jotter. Oceanic Lithosphere The rigid, outermost layer of the Earth comprising the crust and upper mantle is called the lithosphere. New oceanic lithosphere forms through volcanism in the form of fissures at mid-oc ...
iNOB
... shrimp, crabs, bacteria, and tubeworms. • For food, these animals depend on certain types of single-cell Archaebacteria and Eubacteria microbes that live off the methane and hydrogen sulfide from the seep. • There are cold seeps in many different places in the world’s ocean. They are often at the ed ...
... shrimp, crabs, bacteria, and tubeworms. • For food, these animals depend on certain types of single-cell Archaebacteria and Eubacteria microbes that live off the methane and hydrogen sulfide from the seep. • There are cold seeps in many different places in the world’s ocean. They are often at the ed ...
1 Plate Tectonics Review w
... Sediment and oceanic crust scraped off ocean crust to form accretionary wedges ...
... Sediment and oceanic crust scraped off ocean crust to form accretionary wedges ...
chapter 15B - plate tectonics 2
... Evidence from ocean drilling • Next slide shows youngest ocean crust (red) at oceanic ridge system, and oldest ocean crust (blue) farthest from the ridge. This supports sea-floor spreading (note symmetry). • Oldest ocean crust is about 180 million years old (myo), while oldest continental crust is ...
... Evidence from ocean drilling • Next slide shows youngest ocean crust (red) at oceanic ridge system, and oldest ocean crust (blue) farthest from the ridge. This supports sea-floor spreading (note symmetry). • Oldest ocean crust is about 180 million years old (myo), while oldest continental crust is ...
answer key - Riverdale Middle School
... a.) Name the feature shown at A. Mid-Ocean Ridge b.) What is occurring at B? Sea-floor spreading c.) What process is shown occurring at C, and why does it occur? Subduction, because the ocean floor is so much heavier (denser) than the land ...
... a.) Name the feature shown at A. Mid-Ocean Ridge b.) What is occurring at B? Sea-floor spreading c.) What process is shown occurring at C, and why does it occur? Subduction, because the ocean floor is so much heavier (denser) than the land ...
Earth Science Chapter 17: Plate Tectonics Chapter Overview
... An American scientist proposed a theory that could explain the topographic, age, and magnetic data from the seafloor. This theory, called seafloor spreading, states that new ocean crust is formed at ocean ridges and destroyed at deep-sea trenches. • The theory of sea floor spreading explained how la ...
... An American scientist proposed a theory that could explain the topographic, age, and magnetic data from the seafloor. This theory, called seafloor spreading, states that new ocean crust is formed at ocean ridges and destroyed at deep-sea trenches. • The theory of sea floor spreading explained how la ...
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.