Plate Tectonics and Continental Drift lab
... shape. Plate boundaries are the sites of intense geologic activity (e.g., earthquakes and volcanoes). The boundaries between plates are of three general types. At divergent boundaries plates move apart while convergent boundaries are where plates collide. A transform boundary is found where two plat ...
... shape. Plate boundaries are the sites of intense geologic activity (e.g., earthquakes and volcanoes). The boundaries between plates are of three general types. At divergent boundaries plates move apart while convergent boundaries are where plates collide. A transform boundary is found where two plat ...
geology of the pacific northwest
... he Paciic Northwest is a land of exciting contrasts. It has the largest annual snowfall in the world. It has rainforests, and it has deserts. he Paciic Northwest also has some of our nation’s greatest natural wonders, such as the mighty Columbia River, majestic Denali Peak, and rugged Glacier Nation ...
... he Paciic Northwest is a land of exciting contrasts. It has the largest annual snowfall in the world. It has rainforests, and it has deserts. he Paciic Northwest also has some of our nation’s greatest natural wonders, such as the mighty Columbia River, majestic Denali Peak, and rugged Glacier Nation ...
File - Mr. Snelgrove
... A geologic process called sea floor spreading causes the ocean floor to move.Ocean floor is created at oceanic ridges and is destroyed or consumed within Earth at subduction zones. This process of recycling the ocean floor occurs within a span of 180 - 200 million years. ...
... A geologic process called sea floor spreading causes the ocean floor to move.Ocean floor is created at oceanic ridges and is destroyed or consumed within Earth at subduction zones. This process of recycling the ocean floor occurs within a span of 180 - 200 million years. ...
mid-ocean ridge
... plankton), which sink from the upper layer of the ocean, known as Pelagic sediments. ...
... plankton), which sink from the upper layer of the ocean, known as Pelagic sediments. ...
Plate Boundary Notes
... mountains, called mid-ocean ridges. • For the last 250 million years, the Atlantic ocean has been growing wider as new crust is added to Sea-floor spreading. • Example: Eurasian and North American Plates= the Mid-Atlantic Ocean Ridge and Iceland. Divergent Boundary Oceanic/ Oceanic ...
... mountains, called mid-ocean ridges. • For the last 250 million years, the Atlantic ocean has been growing wider as new crust is added to Sea-floor spreading. • Example: Eurasian and North American Plates= the Mid-Atlantic Ocean Ridge and Iceland. Divergent Boundary Oceanic/ Oceanic ...
V: 0
... Tectonics is the discovery of what in both South America and Africa? A. Insects on both continents have similar feeding habits B. The rates of sedimentary rock formation are similar C. The ancient atmosphere in both places are similar D. Fossil remains of the same land-dwelling animal were found on ...
... Tectonics is the discovery of what in both South America and Africa? A. Insects on both continents have similar feeding habits B. The rates of sedimentary rock formation are similar C. The ancient atmosphere in both places are similar D. Fossil remains of the same land-dwelling animal were found on ...
Theory of Plate Tectonics
... lithosphere topped with oceanic and/or continental crust. The plates are moved around on Earth’s surface by seafloor spreading. Convection in the mantle drives seafloor spreading. Oceanic crust is created at mid-ocean ridges. The crust moves outward from the ridge over time. The crust may eventually ...
... lithosphere topped with oceanic and/or continental crust. The plates are moved around on Earth’s surface by seafloor spreading. Convection in the mantle drives seafloor spreading. Oceanic crust is created at mid-ocean ridges. The crust moves outward from the ridge over time. The crust may eventually ...
Continental Formation - Department of Geosciences
... basalts into grantioids has to exist • The only reasonable place- the continental arcs • If not- we simply don’t have a good enough environment today (or in the recent geologic past) that makes continents • The key place where all may can be explained: the Sierra Nevada of California ...
... basalts into grantioids has to exist • The only reasonable place- the continental arcs • If not- we simply don’t have a good enough environment today (or in the recent geologic past) that makes continents • The key place where all may can be explained: the Sierra Nevada of California ...
No Slide Title
... Lecture 1: Sediment loading and unloading Lithospheric flexure, Hawaii; elastic thickness and its relationship to plate and load age; sediment loading, the lithosphere as a filter; Amazon Cone; sediment unloading, English Midlands; sediment loading and unloading at passive margins. ...
... Lecture 1: Sediment loading and unloading Lithospheric flexure, Hawaii; elastic thickness and its relationship to plate and load age; sediment loading, the lithosphere as a filter; Amazon Cone; sediment unloading, English Midlands; sediment loading and unloading at passive margins. ...
The Theory of Seafloor Spreading
... mountain range that is more than 56000 kilometers (35000 mi) long, where new seafloor is being created. Rift Valley – The valley between the ridges where lava rises on the ocean floor and forms new rock. Trench – Deep, steep, narrow crack in the ocean floor where old sinks back into the mantle and i ...
... mountain range that is more than 56000 kilometers (35000 mi) long, where new seafloor is being created. Rift Valley – The valley between the ridges where lava rises on the ocean floor and forms new rock. Trench – Deep, steep, narrow crack in the ocean floor where old sinks back into the mantle and i ...
Structure of the southern Jalisco subduction zone, Mexico, as
... Jalisco block, comprises the northern part of the Middle America trench (MAT) between the Tres Marías Islands and the southern Colima rift. The subduction process occurring within this zone produces large earthquakes (e.g., Singh et al., 1985; Pacheco et al., 1997a); however, the background seismici ...
... Jalisco block, comprises the northern part of the Middle America trench (MAT) between the Tres Marías Islands and the southern Colima rift. The subduction process occurring within this zone produces large earthquakes (e.g., Singh et al., 1985; Pacheco et al., 1997a); however, the background seismici ...
Plate Boundaries - Westfield School
... At a divergent plate boundary, two plates move apart. As the two plates move apart, magma rises up to fill the gap. This causes volcanoes. However, since the magma can escape easily at the surface the volcano does not erupt with much force. Earthquakes are also found at divergent boundaries. An exam ...
... At a divergent plate boundary, two plates move apart. As the two plates move apart, magma rises up to fill the gap. This causes volcanoes. However, since the magma can escape easily at the surface the volcano does not erupt with much force. Earthquakes are also found at divergent boundaries. An exam ...
PEUXENOS
... the continent-al lithosphere in that part of the world, which in turn explains its high topography. ...
... the continent-al lithosphere in that part of the world, which in turn explains its high topography. ...
Magnitude 7.2 KAMCHATKA PENINSULA
... northern California. An animation of that tsunami and its record at two DART buoys adjacent to the Aleutian Trench can be found at nctr.pmel.noaa.gov/kuril20061115.html Image courtesy of the US Geological Survey ...
... northern California. An animation of that tsunami and its record at two DART buoys adjacent to the Aleutian Trench can be found at nctr.pmel.noaa.gov/kuril20061115.html Image courtesy of the US Geological Survey ...
Background Knowledge – Layers of the Earth 1. List the layers of the
... 4. Describe the trends of the ocean floor age, sediment thickness, and heat flow as you move away from the center of the mid-ocean ridge. As you move away from the center of a mid-ocean ridge, the ocean floor gets older, the sediment on top of the floor gets thicker, and the heat flow decreases or g ...
... 4. Describe the trends of the ocean floor age, sediment thickness, and heat flow as you move away from the center of the mid-ocean ridge. As you move away from the center of a mid-ocean ridge, the ocean floor gets older, the sediment on top of the floor gets thicker, and the heat flow decreases or g ...
Web page 1
... paleomagnetics and show a simplified timeline of events. Readers can find more detailed information in subsequent pages which concentrate on slab gaps and the deformation caused within the continental US due to forces without. ...
... paleomagnetics and show a simplified timeline of events. Readers can find more detailed information in subsequent pages which concentrate on slab gaps and the deformation caused within the continental US due to forces without. ...
22.4 Plate Tectonics
... • Later on, geologists discovered fossils of species of landbased plants and animals on continents separated by large ...
... • Later on, geologists discovered fossils of species of landbased plants and animals on continents separated by large ...
Demonstrating Plate Boundaries Script
... other and touching. Your right hand should now represent the more dense oceanic crust and your left hand the continental crust. Have students repeat the process of slowly pushing their fingertips together. Students should show that the right hand goes under the left one as the two “plates” collide. ...
... other and touching. Your right hand should now represent the more dense oceanic crust and your left hand the continental crust. Have students repeat the process of slowly pushing their fingertips together. Students should show that the right hand goes under the left one as the two “plates” collide. ...
Convergent Boundaries
... Boundaries. Divergent Boundaries Convergent Boundaries Transform Boundaries Each one has a type of STRESS on the rock & a way that it breaks called a FAULT: ...
... Boundaries. Divergent Boundaries Convergent Boundaries Transform Boundaries Each one has a type of STRESS on the rock & a way that it breaks called a FAULT: ...
Powerpoint
... Principles of plate tectonics The outermost portion of Earth is composed of a mosaic of thin rigid plates (pieces of lithosphere) that move horizontally with respect to one another Plates interact with each other along their edges (called plate boundaries) Plate boundaries have a high degree of tec ...
... Principles of plate tectonics The outermost portion of Earth is composed of a mosaic of thin rigid plates (pieces of lithosphere) that move horizontally with respect to one another Plates interact with each other along their edges (called plate boundaries) Plate boundaries have a high degree of tec ...
Sea-Floor Spreading Power Point
... In the mid-1900’s, scientists realized that the ocean floor had many mountain ranges similar to those on the continents. ...
... In the mid-1900’s, scientists realized that the ocean floor had many mountain ranges similar to those on the continents. ...
A free plate surface and weak oceanic crust
... friction coefficients and requires a moderate increase of viscosity with depth in order to avoid slab break-off. The lithospheric strength, here controlled by the friction coefficient, is a key parameter controlling subduction style. While weak plates result in unsteady ‘blob-like’ subduction, asymm ...
... friction coefficients and requires a moderate increase of viscosity with depth in order to avoid slab break-off. The lithospheric strength, here controlled by the friction coefficient, is a key parameter controlling subduction style. While weak plates result in unsteady ‘blob-like’ subduction, asymm ...
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.