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Review sheet for Exam 1, Locations and Maps
Review sheet for Exam 1, Locations and Maps

... ASTR/GEOL 1070: The Earth: Its Physical Environment ...
Continental Crust
Continental Crust

... • Forms mountains, e.g. European Alps, Himalayas ...
Sea Floor Spreading The Mid-ocean Ridge
Sea Floor Spreading The Mid-ocean Ridge

... Moving toward each other Classified according to type of crust involved Oceanic crust mostly basalt Continental crust granite and sedimentary rock Oceanic-oceanic- subduction occurs (one plate descends) creates deep sea trench, forms arc of volcanic islands: Mariana trench and islands ...
Plate Tectonics
Plate Tectonics

...  Believed continents were once all combined into one landmass he called Pangaea meaning “All Earth”  Continents seemed to fit together like a jigsaw puzzle  Explained why fossils of the same plants and animals are found on the coast of Africa and South America ...
Ocean-Continent Convergent Plate Boundaries Quiz
Ocean-Continent Convergent Plate Boundaries Quiz

... Both are made when two plates collide. Mountain building can be made by two continental crust colliding with each other creating a mountain. Volcanic mountains are made by subduction when an oceanic plate collides with a continental plate. ...
Notes: Plate Boundaries Name: Plate Tectonics
Notes: Plate Boundaries Name: Plate Tectonics

... paragraph where the answers can be found.   ...
Don’t Break Your Plate
Don’t Break Your Plate

... When two continental plates meet head-on, neither one subducts. Plates tend to buckle and rise up/sideways to form mountain ranges ...
WORLD GEOGRAPHY TODAY Red Flag Questions Pages 63
WORLD GEOGRAPHY TODAY Red Flag Questions Pages 63

... 1. What physical processes inside the Earth build up the land? 2. What physical processes on Earth’s surface wear down the land? 3. How do these physical processes interact to create landforms? FORCES BELOW EARTH’S SURFACE ...
No Slide Title - physicalallen
No Slide Title - physicalallen

... • Rocks in the asthenosphere are partially melted and flow slowly • Convection currents rising and sinking push the plates apart and pull them together ...
Plate Tectonics Matching
Plate Tectonics Matching

...  moves the tectonic plates Pangaea  continents were joined  similar rocks and fossils on separate continents  similar mountain ranges divergent boundary between two plates boundary that are moving apart convergent two plates move together boundary mid-ocean mountains chains at the bottom ridge o ...
Jeopardy - Central Lyon CSD
Jeopardy - Central Lyon CSD

... When two plates are sliding past each other, the type of boundary is known as a _______ boundary. ...
Don`t Break Your Plate
Don`t Break Your Plate

... New crust is created as two plates pull away from each other If two oceanic plates, the ocean will grow wider—seafloor spreading If two continental plates, creates a rift that will form two different land masses ...
Chapter 17 Vocabulary
Chapter 17 Vocabulary

... tectonic plates are moving toward each other; is associated with trenches, island arcs, and folded mountains. Divergent Boundary (p. 456) Place where two of Earth’s tectonic plates are moving apart; is associated with volcanism, earthquakes, and high heat flow, and is found primarily on the seafloor ...
Shoreline Fit of the Continents Fossil Evidence
Shoreline Fit of the Continents Fossil Evidence

... Sediment gets older towards the edges of continents ...
Layers of Earth`s Interior Continental Drift/Seafloor
Layers of Earth`s Interior Continental Drift/Seafloor

... ■ Shear forces cause plates to grind/slide past each other ■ Effects: shallow earthquakes ○ Earthquakes, along with volcanoes, mountains, ridges, and trenches occur at the boundary between two plates. ...
Plate Tectonics - Teacher Background File
Plate Tectonics - Teacher Background File

... thickened continental crust forms a “keel” below the range and its mass attracts the pendulum. 2. Marine trenches Marine exploration scientists also observed deep trenches along active volcanic continental margins. Ocean sounding using weights and cables has been superseded by LIDAR, an echo sounder ...
Plate Boundaries
Plate Boundaries

... On the back of that half, label at the top “Definition of _____” and label accordingly. On the second page of notebook, fold in half and then draw a line up the center. Then separate into the same three even halves. Across the top of this page, label each “Landforms or Geologic Events” and then labe ...
Plate Tectonics: Ch. 22.4 Self Quiz
Plate Tectonics: Ch. 22.4 Self Quiz

... 6. The patterns of magnetic striping on the sea – floor indicate that … a. Rocks of the ocean floor are all the same age. b. Rocks of the ocean floor vary in age c. Rocks of the ocean floor are the oldest on the ...
Plate Tectonics: Ch. 22.4 Self Quiz
Plate Tectonics: Ch. 22.4 Self Quiz

... 6. The patterns of magnetic striping on the sea – floor indicate that … a. Rocks of the ocean floor are all the same age. b. Rocks of the ocean floor vary in age c. Rocks of the ocean floor are the oldest on the ...
1. 1. Draw a subduction zone in which an oceanic plate collides with
1. 1. Draw a subduction zone in which an oceanic plate collides with

... 1. 1. Draw a subduction zone in which an oceanic plate collides with a continental plate. Label the following on your sketch: the oceanic plate, the continental plate, location of seismicity (if any), location of volcanism (if any). Draw the boundary between the crust and the mantle and the boundary ...
Plate Tectonics
Plate Tectonics

...  The mid-ocean ridge is the longest chain of mountains.  Most of the mountains in the mid-ocean ridge lie hidden under hundreds of meters of water.  Hess proposed that the ocean floors move, carrying the continents along with them. The movement begins at the mid-ocean ridge.  At the mid-ocean r ...
Plate Tectonics Review Sheet
Plate Tectonics Review Sheet

... What was the name of the super continent? List and explain evidence that supports the hypothesis of continental drift. ...
The Theory of Plate Tectonics
The Theory of Plate Tectonics

... below the continent and the continental plate slides over the top of the oceanic plate. Forms a TRENCH. ...
PTOPs Student Information Sheet Answer Key
PTOPs Student Information Sheet Answer Key

... The subduction of the ancient Farallon plate underneath the North American plate caused the uplift of the Sierra Nevadas. Melting of the subducted plate led to the production of magma. ...
Life on an Ocean Planet
Life on an Ocean Planet

... Island Arcs  Convergent ocean plates  Subduction of denser plate ...
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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.
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