問題一覧
1
An american geologist
Harry hess
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When was seafloor spreading theory proposed
1960's
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Coined the term "seafloor spreading"
Robert S. Dietz
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New oceanic crust is formed at mid ocean ridges and spreads outwards, pushing older crust away from the ridge.
Sea floor spreading
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A deep canal in the ocean floor
Trench
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meaning of SONAR
Sound Navigation and Ranging
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Uses longitudinal waves to find and identify objects in the water
SONAR
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Region between an oceanic trench and the associated volcanic arc found in convergent margins
Forearc
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A.K.A destructive plate boundary
Convergent Boundaries
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It occurs when two plates push against each other
Convergent Boundaries
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areas where tectonic plates dive beneath other plates into earth's interior
Subduction zones
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100km before subducting plate heats up
Depth of earthquakes
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Two seismologist
Kiyoo Wadati and Hugo Benioff
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Three Convergent Boundaries
Oceanic to Continental Convergence Oceanic to Oceanic Convergence Continental to Continental Convergence
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Sierra madre mountain range, Andes Mountains and Cascade Range
Oceanic to continental convergence
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Trenches, The arc of volcanic islands
Oceanic to Oceanic Convergence
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Zone of kountains - The himalayas
Continental to continental Convergence
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A.K.A constructive plate boundary
Divergent Boundaries
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It occurs when two plates move apart from each other
Divergent Boundaries
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This plate is characterized by tensional stresses that normally produce long rift zones, normal daults, and basaltic volcanism
divergent Boundaries
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A.K.A conservative plate boundary
Transform Boundaries
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Two plates slide horizontally past one another
Transform boundaries
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These are generally vertical and prallel to the direction of movement. They are produced by sharing and are closely related to Divergent plate boundaries on the ocean floor
Transform Boundaries
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Pccur in the ocean floor
Fracture zones
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When on land
Faults
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Three types of transform plate boundaries
Ridge-Ridge transform Ridge-Trench transform Trench-Trench transform