Plate Tectonics Study Guide (Chapter 13 Lesson 1) Challenge Date
... Where does subduction occur? Circle one: mid-ocean ridge Where does oceanic crust go when it is subducted? Be able to read a map that shows the ages of the Atlantic Ocean floor. ...
... Where does subduction occur? Circle one: mid-ocean ridge Where does oceanic crust go when it is subducted? Be able to read a map that shows the ages of the Atlantic Ocean floor. ...
Unit 11: Plate Tectonics
... 1. Paleomagnetism - the study of the Earth’s magnetic field in the past – used as evidence for seafloor spreading a. Normal Polarity – when rocks show the same magnetism as the present magnetic field b. Reverse polarity – rocks that show the opposite magnetism c. the discovery of strips of alternati ...
... 1. Paleomagnetism - the study of the Earth’s magnetic field in the past – used as evidence for seafloor spreading a. Normal Polarity – when rocks show the same magnetism as the present magnetic field b. Reverse polarity – rocks that show the opposite magnetism c. the discovery of strips of alternati ...
oceans
... • Younger rocks are found closer to the ridge • Less sediment closer to the ridge • Polarity of magnetic minerals is mirror image on either side of the ridge – N and S pole flip periodically – Minerals line up as magma cools with the N pole ...
... • Younger rocks are found closer to the ridge • Less sediment closer to the ridge • Polarity of magnetic minerals is mirror image on either side of the ridge – N and S pole flip periodically – Minerals line up as magma cools with the N pole ...
Earth is made of materials with different DENSITIES The 4 layers of
... boundaries. Mid-ocean ridges form the longest MOUNTAIN chains on Earth. The largest mid-ocean ridge is the MID-ATLANTIC RIDGE which runs about _____ miles through the ATLANTIC Ocean. Most mid-ocean ridges contain a RIFT VALLEY along the center. 7. Magma rising through cracked, thinned crust forms VO ...
... boundaries. Mid-ocean ridges form the longest MOUNTAIN chains on Earth. The largest mid-ocean ridge is the MID-ATLANTIC RIDGE which runs about _____ miles through the ATLANTIC Ocean. Most mid-ocean ridges contain a RIFT VALLEY along the center. 7. Magma rising through cracked, thinned crust forms VO ...
EES Review for Final Exam
... Ch. 18 – Water in the Atmosphere Salinity – about 3.5% (35 parts per thousand) Processes that affect salinity – icebergs, runoff, sea ice, evaporation Thermocline – ocean temperature variation Pycnocline – ocean density variation; salinity and pressure affect ocean density Ocean layering: surface zo ...
... Ch. 18 – Water in the Atmosphere Salinity – about 3.5% (35 parts per thousand) Processes that affect salinity – icebergs, runoff, sea ice, evaporation Thermocline – ocean temperature variation Pycnocline – ocean density variation; salinity and pressure affect ocean density Ocean layering: surface zo ...
Chapter 17
... 1950s led to more detailed ocean floor mapping • Magnetometer: detects changes in magnetic fields • Sonar: found mid-ocean ridges and deep sea trenches • Interesting patterns in age of rock samples ...
... 1950s led to more detailed ocean floor mapping • Magnetometer: detects changes in magnetic fields • Sonar: found mid-ocean ridges and deep sea trenches • Interesting patterns in age of rock samples ...
Chapter 4
... Sea Floor Spreading on Land • Sea floor spreading adds thin, lowelevation ocean crust to landmass. Eventually water fills in • Arabian peninsula split from African continent • Process continues in East Africa rift valleys (note lakes filling in low lying ocean crust) • Somali Plate? ...
... Sea Floor Spreading on Land • Sea floor spreading adds thin, lowelevation ocean crust to landmass. Eventually water fills in • Arabian peninsula split from African continent • Process continues in East Africa rift valleys (note lakes filling in low lying ocean crust) • Somali Plate? ...
Topography of the Ocean Floor Notes
... A mound of sediments at the bottom of the continental slope ...
... A mound of sediments at the bottom of the continental slope ...
Lecture 1.
... at the Mid-Atlantic Ridge. Only a small portion of the oceanic crust produced in the Atlantic is subducted. However, the plates making up the Pacific Ocean are experiencing subduction along many of their boundaries which causes the volcanic activity in what has been termed the Ring of Fire of the Pa ...
... at the Mid-Atlantic Ridge. Only a small portion of the oceanic crust produced in the Atlantic is subducted. However, the plates making up the Pacific Ocean are experiencing subduction along many of their boundaries which causes the volcanic activity in what has been termed the Ring of Fire of the Pa ...
Tectonic Plate Theory PowerPoint Study Guide
... *Divergent-Spreading CenterOcean ridges and seafloor spreading (Atlantic Ocean) *Convergent-Creates trenches and island arcs (Pacific Ocean) *Transform-Plates move past one another (San Andreas Fault in California) ...
... *Divergent-Spreading CenterOcean ridges and seafloor spreading (Atlantic Ocean) *Convergent-Creates trenches and island arcs (Pacific Ocean) *Transform-Plates move past one another (San Andreas Fault in California) ...
Preview from Notesale.co.uk Page 1 of 1
... parts of the ocean—and some of the deepest natural spots on Earth. Ocean trenches are found in every ocean basin on the planet, although the deepest ocean trenches ring the Pacific as part of the so-called “Ring of Fire” that also includes active volcanoes and earthquake zones.Ocean trenches are a r ...
... parts of the ocean—and some of the deepest natural spots on Earth. Ocean trenches are found in every ocean basin on the planet, although the deepest ocean trenches ring the Pacific as part of the so-called “Ring of Fire” that also includes active volcanoes and earthquake zones.Ocean trenches are a r ...
the midocen ridge and the black smokers
... and magnesium (3) are removed from the water. As the water begins to heat up (4), sodium, potassium, and calcium dissolve from the crust. Magma superheats the water, dissolving iron, zinc, copper, and sulfur (5). The water then rises back to the surface (6), where it mixes with the cold seawater, fo ...
... and magnesium (3) are removed from the water. As the water begins to heat up (4), sodium, potassium, and calcium dissolve from the crust. Magma superheats the water, dissolving iron, zinc, copper, and sulfur (5). The water then rises back to the surface (6), where it mixes with the cold seawater, fo ...
11 Sea Floor
... 1. Passive Margin = where oceanic plate is fused to continental plate and large amount of sediment is deposited. – Ex: Eastern N. America Cont’l Margin ...
... 1. Passive Margin = where oceanic plate is fused to continental plate and large amount of sediment is deposited. – Ex: Eastern N. America Cont’l Margin ...
Chapter 2 – Plate Tectonics
... The inner core is 4000°C and made of nickel and iron. It has one million times as much pressure as the surface of the earth. The outer part of the mantle is plastic and can flow, the asthenoshere. Ocean and continental crust float on top. Ocean crust is thinner and more dense, mostly basalt. ...
... The inner core is 4000°C and made of nickel and iron. It has one million times as much pressure as the surface of the earth. The outer part of the mantle is plastic and can flow, the asthenoshere. Ocean and continental crust float on top. Ocean crust is thinner and more dense, mostly basalt. ...
GEOL1033-SQS07R
... 14. Which subdivision, zone, or layer of Earth, as visualized in cross section, is composed mostly of iron and some nickel? ________________________ 15-16. The lithosphere is composed of what two zones? ...
... 14. Which subdivision, zone, or layer of Earth, as visualized in cross section, is composed mostly of iron and some nickel? ________________________ 15-16. The lithosphere is composed of what two zones? ...
The sea floor spreads apart at divergent boundaries.
... In the ocean, divergent boundaries are also called spreading centers. Mid-ocean ridges mark these sites where the ocean floor is spreading apart. As the ridges continue to widen, a gap called a rift valley forms. Here molten material rises to build new crust. ...
... In the ocean, divergent boundaries are also called spreading centers. Mid-ocean ridges mark these sites where the ocean floor is spreading apart. As the ridges continue to widen, a gap called a rift valley forms. Here molten material rises to build new crust. ...
crust outermost layer of earth mantle layer between core and crust
... piece of lithosphere that move around on top of asthenosphere ...
... piece of lithosphere that move around on top of asthenosphere ...
The Earth`s Drifting Continents
... Alfred Wegener suggested that the continents were once and have since drifted ...
... Alfred Wegener suggested that the continents were once and have since drifted ...
Deepest Place on Earth film worksheet
... globe, to make the largest geological feature on Earth. 12. During the Cold War, the U.S. built a vast network of underground ____________________ to detect __________________________ testing around the world. These instruments also detected____________________________ which were primarily clustered ...
... globe, to make the largest geological feature on Earth. 12. During the Cold War, the U.S. built a vast network of underground ____________________ to detect __________________________ testing around the world. These instruments also detected____________________________ which were primarily clustered ...
Plate Boundaries
... • The continents were once a super-continent called Pangea • the continents are plowing through the ocean floors---most people didn’t believe this ...
... • The continents were once a super-continent called Pangea • the continents are plowing through the ocean floors---most people didn’t believe this ...
Mariana Trench - WordPress.com
... WHAT CREATED THE MARIANA TRENCH • IT WAS CREATED BY OCEAN CRUST-TO-OCEAN CRUST SUBDUCTION. • A PHENOMENA IN WHICH A OCEANIC PLATE IS TOPPED BY ANOTHER OCEANIC PLATE. ...
... WHAT CREATED THE MARIANA TRENCH • IT WAS CREATED BY OCEAN CRUST-TO-OCEAN CRUST SUBDUCTION. • A PHENOMENA IN WHICH A OCEANIC PLATE IS TOPPED BY ANOTHER OCEANIC PLATE. ...
Evidence of Seafloor Spreading
... mantle and core to the lithosphere. Convection currents also “recycle” lithospheric materials back to the mantle. A rift valley is a large elongated depression with steep walls formed by the downward displacement of a block of the earth's surface between nearly parallel faults or fault systems. ...
... mantle and core to the lithosphere. Convection currents also “recycle” lithospheric materials back to the mantle. A rift valley is a large elongated depression with steep walls formed by the downward displacement of a block of the earth's surface between nearly parallel faults or fault systems. ...
Theory of plate tectonics - 8th Grade Social Studies
... is destroyed as one plate dives under another Transform boundaries – where crust is neither produced nor destroyed as the plates slide horizontally past each other Plate boundary zones – broad belts in which boundaries are not well defined and the effects of plate interaction are ...
... is destroyed as one plate dives under another Transform boundaries – where crust is neither produced nor destroyed as the plates slide horizontally past each other Plate boundary zones – broad belts in which boundaries are not well defined and the effects of plate interaction are ...
Poor Wegener - Issaquah Connect
... HOW the continents could drift. In the 1950’s scientists began mapping the ocean floor using sonar. They expected it to be smooth and level……. ...
... HOW the continents could drift. In the 1950’s scientists began mapping the ocean floor using sonar. They expected it to be smooth and level……. ...
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.