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| large wedgeshaped mass of sediment that accumulates in subduction zones. here sediment is scraped from the subducting oceanic plate and accreted to the overriding crustal block. |
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| Andean-type plate margins |
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Definition
| plate boundaries that generate continental volcanic arcs |
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| a basin that forms on the side of a volcanic arc away from the trench. |
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mountains formed in part by igneous activity associated with the subduction of oceanic lithosphere beneath a continent.
ex: Andes and Cascades |
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| a mountain formed by the displacement of rock along a fault. |
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regions within compressional mountain systems where large areas have been shortened and thickened by the processes of folding and thrust faulting.
ex: Valley and Ridge Province of the Appalachains. |
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| the region located between a volcanic arc and an accretionary wedge where shallow water marine sediments typically accumulate. |
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| the gradual subsidence of mountains caused by lateral spreading of weak material located deep within these structures. |
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| a chain of volcanic islands generally located a few hundred km from a trench where there is active subduction of one oceanic plate beneath another. |
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| the concept that Earth's crust is "floating" in gravitational balance upon the material of the mantle. |
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| compensation of the lithosphere when weight is added or removed. When weight is added, the lithosphere will respond by subsiding, and when weight is removed, there will be uplift. |
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relatively small fragments of continental crust that may lie above sea leave, such as the island of Madagascar, or be submerged.
ex: Campbell Plateau near New Zealand |
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| the processes that collectively result in the formation of mountains |
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| maring that consist of a continental shelf, slop, and rise. they are not associated with plate boundaries therefore experiencing little volcanism and few earthquakes. |
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Definition
the zone along which two crustal fragments are jointed together.
ex: continental collisoin the two continental blocks are sutured together. |
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Definition
| a crustal block bounded by faults, whose geologic history is distinct from the histories of adjoining crustal blocks. |
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Definition
| a chain of volcanic islands generally located a few hundred km from a trench where there is active subduction of one oceanic plate beneath another. |
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