Narrow continental shelf AN ACTIVE MARGIN A PASSIVE MARGIN Peru- Chile Trench Plate boundary Andes Mountains Plate boundary Broad South America continental shelf Atlantic Ocean Pacific Ocean Suth American Plate - Deep basin African Piate Nazca Plate Plate movement Plate Plate movement movement Subduction zone (deep and shallow earthquakes) Mid-Atlantic Ridge (spreading centers, shallow earthquakes) Typical continental margins bordering the tectonically active (Pacific-type) and tectonically passive (Atlantic- NORTH AMERICAN PLATE type) edges of a moving continent. (The vertical scale has been exaggerated.) Figure 4.11 Active and passive margins. Mt. Rainier Seattle Fault Mt. Adams Olympic Peninsula Sea level Crust Locked zone 20 Mantle 40 60 Crust Crustal Mantie earthquakes A more detailed view of subduction and earthquakes at an active margin; in this case, the American Pacific Deep-slab earthquakes Northwest. Subduction earthquakes © Cengage Learning Mies
Narrow continental shelf AN ACTIVE MARGIN A PASSIVE MARGIN Peru- Chile Trench Plate boundary Andes Mountains Plate boundary Broad South America continental shelf Atlantic Ocean Pacific Ocean Suth American Plate - Deep basin African Piate Nazca Plate Plate movement Plate Plate movement movement Subduction zone (deep and shallow earthquakes) Mid-Atlantic Ridge (spreading centers, shallow earthquakes) Typical continental margins bordering the tectonically active (Pacific-type) and tectonically passive (Atlantic- NORTH AMERICAN PLATE type) edges of a moving continent. (The vertical scale has been exaggerated.) Figure 4.11 Active and passive margins. Mt. Rainier Seattle Fault Mt. Adams Olympic Peninsula Sea level Crust Locked zone 20 Mantle 40 60 Crust Crustal Mantie earthquakes A more detailed view of subduction and earthquakes at an active margin; in this case, the American Pacific Deep-slab earthquakes Northwest. Subduction earthquakes © Cengage Learning Mies
Applications and Investigations in Earth Science (9th Edition)
9th Edition
ISBN:9780134746241
Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Chapter1: The Study Of Minerals
Section: Chapter Questions
Problem 1LR
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Question
One of the most violent earthquakes recorded in North America occurred near New Madrid, Missouri, in 1811. Is Missouri at an active or passive margin? No margin? Can you propose a cause for this earthquake?
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