Plate Tectonics
... mapping the ocean floor with a fathometer - a type of sonar that used echo sounding to help ships know where the bottom of the ocean floor was. He proposed that hot, less dense material below the crust rises toward the surface at the mid ocean ridges, flowing sideways, carrying the seafloor away fro ...
... mapping the ocean floor with a fathometer - a type of sonar that used echo sounding to help ships know where the bottom of the ocean floor was. He proposed that hot, less dense material below the crust rises toward the surface at the mid ocean ridges, flowing sideways, carrying the seafloor away fro ...
Clues for mountain formation
... the continental rocks are relatively light • like two colliding icebergs, plates resist ...
... the continental rocks are relatively light • like two colliding icebergs, plates resist ...
Dynamic Crust 4 Plate Tectonics
... Transform Fault Boundaries At a transform fault boundary, plates grind past each other without destroying the lithosphere. Transform faults • Most join two segments of a mid-ocean ridge. • At the time of formation, they are roughly parallel to the direction of plate movement. • They aid the move ...
... Transform Fault Boundaries At a transform fault boundary, plates grind past each other without destroying the lithosphere. Transform faults • Most join two segments of a mid-ocean ridge. • At the time of formation, they are roughly parallel to the direction of plate movement. • They aid the move ...
Review of Plate Tectonics Name
... 15. Another type of plate boundary called a ________________ boundary occurs where two plates are sliding past each other. At this type of site the plates get locked together with friction and store great stress over a long time. When the boundary finally breaks apart, the sudden motion causes _____ ...
... 15. Another type of plate boundary called a ________________ boundary occurs where two plates are sliding past each other. At this type of site the plates get locked together with friction and store great stress over a long time. When the boundary finally breaks apart, the sudden motion causes _____ ...
Review Sheet
... Describe the relative motions of plates. Be able to list & explain Wegener’s evidence for continental drift. Describe the relationship between volcanoes, earthquakes, & plate boundaries. List & describe evidence for the theory of Sea Floor Spreading. Explain convection currents & how they are relate ...
... Describe the relative motions of plates. Be able to list & explain Wegener’s evidence for continental drift. Describe the relationship between volcanoes, earthquakes, & plate boundaries. List & describe evidence for the theory of Sea Floor Spreading. Explain convection currents & how they are relate ...
Plate Tectonics - dhsearthandspacescience
... What evidence supports the idea of plate tectonics? (5 reasons) 4. Paleomagnetic studies of Earth’s past magnetic fields suggest the magnetic north pole has changed. A parsimonious (simple) explanation is that landmasses have moved, NOT the north pole. Stripes within magnetite (magnetic magma mine ...
... What evidence supports the idea of plate tectonics? (5 reasons) 4. Paleomagnetic studies of Earth’s past magnetic fields suggest the magnetic north pole has changed. A parsimonious (simple) explanation is that landmasses have moved, NOT the north pole. Stripes within magnetite (magnetic magma mine ...
Week 2 background reading
... diverging from the main Africa plate, which is heading north. about 60 million years ago as Greenland & northwest Scotland separated to form the Atlantic Ocean. A series of underwater volcanoes exists along the margin, occasionally appearing above sea-level as volcanic islands. An example of such is ...
... diverging from the main Africa plate, which is heading north. about 60 million years ago as Greenland & northwest Scotland separated to form the Atlantic Ocean. A series of underwater volcanoes exists along the margin, occasionally appearing above sea-level as volcanic islands. An example of such is ...
File
... a) magma rises at mid-ocean ridges to create new ocean floor b) ocean floor slowly moves outward away from the rift c) ocean floor sinks back into the mantle at deep-ocean trenches ...
... a) magma rises at mid-ocean ridges to create new ocean floor b) ocean floor slowly moves outward away from the rift c) ocean floor sinks back into the mantle at deep-ocean trenches ...
Basin and Range
... • Prior to 200 million years ago, – the west coast of South America – was a passive continental margin – where huge quantities of sediment were deposited ...
... • Prior to 200 million years ago, – the west coast of South America – was a passive continental margin – where huge quantities of sediment were deposited ...
Chapter 8: Volcanoes The Big Idea: Volcanoes form as a result of
... -Plates collide, the denser plate sinks. As the plate sinks a trench is formed. As the plate subducts into the mantle (subduction), the rock is subjected to heat and pressure, which causes the rock to melt. ...
... -Plates collide, the denser plate sinks. As the plate sinks a trench is formed. As the plate subducts into the mantle (subduction), the rock is subjected to heat and pressure, which causes the rock to melt. ...
Week 3 (Norton), part b (pdf, 5.7 MB)
... earth scientists, transform faults, that transected roughly perpendicularly mid ocean ridges. A couple of papers by Tuzo Wilson, and one each by Heezen and Goode, all in 1965, finally unified all the theoretical bases for how continents could be “rafting around” continuously atop denser components o ...
... earth scientists, transform faults, that transected roughly perpendicularly mid ocean ridges. A couple of papers by Tuzo Wilson, and one each by Heezen and Goode, all in 1965, finally unified all the theoretical bases for how continents could be “rafting around” continuously atop denser components o ...
Pangaea Wegener video guide 2016 17
... meaning all/whole earth. He theorized further that around 250 million years ago these continents drifted apart. His theories needed evidence to support them. Directions: List and describe 3 pieces of evidence below. 1. Evidence: ________________________________ Explanation: ...
... meaning all/whole earth. He theorized further that around 250 million years ago these continents drifted apart. His theories needed evidence to support them. Directions: List and describe 3 pieces of evidence below. 1. Evidence: ________________________________ Explanation: ...
Inside the Restless Earth
... A. 3 Possible Causes of Plate Tectonic motion (pg 99-figure 13) a. Ridge push – Oceanic plate slides down the lithosphere asthenosphere boundary ...
... A. 3 Possible Causes of Plate Tectonic motion (pg 99-figure 13) a. Ridge push – Oceanic plate slides down the lithosphere asthenosphere boundary ...
Sea-Floor Spreading powerpoint
... • At the mid-ocean ridge, molten material rises from the mantle and erupts. It spreads out, pushing older rock to both sides of the ridge. ...
... • At the mid-ocean ridge, molten material rises from the mantle and erupts. It spreads out, pushing older rock to both sides of the ridge. ...
Tectonic Plates
... pushed underneath the continental crust • The melt rises forming volcanism • Example: The Andes ...
... pushed underneath the continental crust • The melt rises forming volcanism • Example: The Andes ...
Edible Tectonics
... 3. Hold the candy bar over the paper towel, and with one hand holding each end of the candy bar, gently pull in opposite directions. The candy bar should stretch slowly and pull apart at the center. ...
... 3. Hold the candy bar over the paper towel, and with one hand holding each end of the candy bar, gently pull in opposite directions. The candy bar should stretch slowly and pull apart at the center. ...
Rocks - Images
... How Continents Move • Lithosphere broken into tectonic plates that ride on the asthenosphere • Oceanic crust – dense, rich in Fe and Mg • Continental crust – low density, rich in silica ...
... How Continents Move • Lithosphere broken into tectonic plates that ride on the asthenosphere • Oceanic crust – dense, rich in Fe and Mg • Continental crust – low density, rich in silica ...
Physical and Ecological Processes
... plates slide past each other, causing a fault or fracture in the crust. One example of a transform boundary is the San Andreas Fault in California. ...
... plates slide past each other, causing a fault or fracture in the crust. One example of a transform boundary is the San Andreas Fault in California. ...
Skills Worksheet
... 2. The hypothesis that continents can drift apart and have done so in the past is known as .______________________ 3. The ______________________ is the soft layer of the mantle on which the tectonic plates move. 4. ______________________ is stress that occurs when forces act to stretch anobject. 5. ...
... 2. The hypothesis that continents can drift apart and have done so in the past is known as .______________________ 3. The ______________________ is the soft layer of the mantle on which the tectonic plates move. 4. ______________________ is stress that occurs when forces act to stretch anobject. 5. ...
Semester 1 Exam Study Guide Stars ESS1-1 1. HS-ESS1
... 31) The temperature below which magnetic material can retain a permanent magnetization is called the _______. A. Darcy temperature B. Curie point C. Bullard point D. Vine temperature 32) A very long-lived magma source located deep in the mantle is called a _______. A. magma welt B. basalt spout C. h ...
... 31) The temperature below which magnetic material can retain a permanent magnetization is called the _______. A. Darcy temperature B. Curie point C. Bullard point D. Vine temperature 32) A very long-lived magma source located deep in the mantle is called a _______. A. magma welt B. basalt spout C. h ...
Chapter2 PlateTectonics
... continental drift was not very convincing and his theory remained discarded till 1960s. • It was revived with the advent of paleomagnetism, which confirmed that the continents have moved relative to one another. ...
... continental drift was not very convincing and his theory remained discarded till 1960s. • It was revived with the advent of paleomagnetism, which confirmed that the continents have moved relative to one another. ...
Outline
... • Side-scan sonar uses a “fish” towed behind a ship to give a more detailed picture of the sea floor • Low frequency sound is used to determine structure beneath the sea floor • Satellites measure sea surface elevation, which mimics sea floor bathymetry The hypsographic curve • The hypsographic curv ...
... • Side-scan sonar uses a “fish” towed behind a ship to give a more detailed picture of the sea floor • Low frequency sound is used to determine structure beneath the sea floor • Satellites measure sea surface elevation, which mimics sea floor bathymetry The hypsographic curve • The hypsographic curv ...
Oceanic trench
The oceanic trenches are hemispheric-scale long but narrow topographic depressions of the sea floor. They are also the deepest parts of the ocean floor. Oceanic trenches are a distinctive morphological feature of convergent plate boundaries, along which lithospheric plates move towards each other at rates that vary from a few mm to over ten cm per year. A trench marks the position at which the flexed, subducting slab begins to descend beneath another lithospheric slab. Trenches are generally parallel to a volcanic island arc, and about 200 km (120 mi) from a volcanic arc. Oceanic trenches typically extend 3 to 4 km (1.9 to 2.5 mi) below the level of the surrounding oceanic floor. The greatest ocean depth to be sounded is in the Challenger Deep of the Mariana Trench, at a depth of 11,034 m (36,201 ft) below sea level. Oceanic lithosphere moves into trenches at a global rate of about 3 km2/yr.