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Plate Tectonics and the Dynamic Earth
Plate Tectonics and the Dynamic Earth

... Some of the Earth’s crust must be destroyed elsewhere, But where… Earthquakes provided the clue Shallow earthquakes occur along mid-ocean ridges as the ridges spread apart Earthquakes also occur in other areas, far from mid-ocean ridges Graphic: Garrison Fig. 3.14. ...
Continental Drift and Plate Tectonics Webquest - Mamanakis
Continental Drift and Plate Tectonics Webquest - Mamanakis

... 2. The type of convergence -- called by some a very slow "collision" -- that takes place between plates depends on the kind of lithosphere involved. Convergence can occur between what types of plates? a) b) c) Scroll down to: Oceanic-continental convergence 3. Off the coast of South America along th ...
Continental Drift and Plate Tectonics Webquest
Continental Drift and Plate Tectonics Webquest

... 1. What is shown in this picture? What type of plate boundary is it? Where is it located? ...
Chapter 5 Review
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... (9)Mid-ocean ridges are places where oceanic crust sinks back to the mantle. (10)When two continental plates diverge, a transform boundary forms. ...
Tectonic Plates The theory of plate tectonics has done for geology
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... huge mountain range, while the edge of the oceanic plate has bent downward and dug deep into the Earth. A trench has formed at the bend. All that folding and bending makes rock in both plates break and slip, causing earthquakes. As the edge of the oceanic plate digs into Earth's hot interior, some o ...
Oceans_I - Geophile.net
Oceans_I - Geophile.net

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Do Now - Barren County Schools
Do Now - Barren County Schools

... plate boundaries, movement of plates, and what causes plate movement  Student will create a graphic organizer that describes each of the three plate boundaries. (convergent, divergent, transform)  Students will paste notes in their notebook and will highlight key points.  Students will also be gi ...
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Task 1 Plates Are Moving Beneath You

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Quiz 2 - Study Guidelines Study Outline
Quiz 2 - Study Guidelines Study Outline

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Plate Tectonics

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Stratigraphy & geochemistry of the Nipigon basin
Stratigraphy & geochemistry of the Nipigon basin

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... Fault 12. A break in the crust where slabs of crust slip past each other due to the build-up of stress Reverse Fault 13. A fault where compression forces cause the land blocks to move in opposite directions Strike-Slip Fault 14. A fault where shearing makes the rocks on either side of the fault sip ...
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... Oceanic crust is usually about 10 kilometers (km) thick, while continental crust ranges from 20 to 80 km thick. For this reason, the lithosphere is about 100–150 km thick under the ocean, and up to 300 km thick at some continents. Despite being thinner, oceanic lithosphere is denser than continental ...
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... the edge. Why do these types of convergent boundary make volcanoes while a continent-continent boundary does not? (5 min / 5 pts) Ocean-Ocean and Ocean-Continent boundaries both have oceanic crust as one of the plates ...
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Chapter 12.2 - Features of Plate Tectonics
Chapter 12.2 - Features of Plate Tectonics

... smoke and ask everywhere, found along plate boundaries  Layers of ash and thick lava (magma outside Earth) form a tall cone.  As magma reaches the surface, it cools, hardens and traps gases below.  Pressure builds, eventually there is an eruption. 2. Shield volcanoes - these are not found at plat ...
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oceanic crust - Science by Shaw

... hypothesis of continental drift. Also talked about the supercontinent Pangaea that broke up into the continents we know today about 180 million years ago. ...
Plate Tectonics Lab - Bakersfield College
Plate Tectonics Lab - Bakersfield College

... By the late 1960’s, scientists had joined together to create the plate tectonic model. The plate tectonic model is used to describe various geologic features, geological rock environments, and the pattern of volcanism as well as earthquake activity. According to the plate tectonic model, the surface ...
Plate Tectonics – Lab
Plate Tectonics – Lab

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Low frequency events occurred during the sequence of aftershock
Low frequency events occurred during the sequence of aftershock

... produces a swell in front of it. Behind the seamount a depression remains. As a result, the subducting seamount should be located between a pair of a swell and a depression. Comparing the horizontal location of the LF events and the bathymetric map in Fig. 1, the LF events seems to be located betwee ...
Plate Tectonics Power Point
Plate Tectonics Power Point

... Ocean-floor spreading helps to explain how continents drift. As a piece of the ocean floor moves, it takes its continent (if it has one) with it. Individual sections of midocean ridges are straight but the ridges as a whole curve.This is because the straight sections are offset by thin cracks known ...
Cordilleran Orogen Main Topics Paleozoic Passive Margin Antler
Cordilleran Orogen Main Topics Paleozoic Passive Margin Antler

... • Collision of the arc with a passive margin • Roberts Mountain Allochton thrust over the passive margin • A series of foreland basins formed in eastern Nevada ...
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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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