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Volcanic arc: Quiz

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Question 1: The best examples of volcanic arcs with both sets of characteristics are in the North Pacific, with the Aleutian Arc consisting of the ________ and their extension the Aleutian Range on the Alaska Peninsula, and the Kuril-Kamchatka Arc comprising the Kuril Islands and southern Kamchatka Peninsula.
Commander IslandsAleutian IslandsAttu IslandAmchitka

Question 2: Two classic examples of oceanic island arcs are the Mariana Islands in the western Pacific Ocean and the Lesser Antilles in the western ________.
Southern OceanAtlantic OceanIndian OceanArctic Ocean

Question 3: In the rock record, volcanic arcs can be seen as the volcanic rocks themselves, but because volcanic rock is easily ________ and eroded, it is more typical that they are seen as plutonic rocks, the rocks that formed underneath the arc (e.g.
OxygenWeatheringMineralCalcium carbonate

Question 4: On the subducting side of the island arc is a deep and narrow ________, which is the trace at the Earth’s surface of the boundary between the downgoing and overriding plates.
Volcanic arcOceanic trenchPhysical oceanographyMarginal sea

Question 5: Multiple ________ occur along this subduction boundary with the seismic hypocenters located at increasing depth under the island arc: these quakes define the Wadati-Benioff zones.
Geotechnical engineeringLandslideEarthquakeS-wave

Question 6: The Cascade Volcanic Arc in western North America and the ________ along the western edge of South America are examples of continental volcanic arcs.
GeographyAndesGran ChacoPhysical geography

Question 7: Map of the volcanic arcs, flat-slab segments and subducted ridges in the ________
Physical geographyGeographyAndesGran Chaco

Question 8: A volcanic arc is a chain of volcanic islands or mountains formed as an oceanic tectonic plate subducts under another tectonic plate and produces ________ at depth under the over-riding plate.
Igneous rockMagmaBasaltGranite







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