EARTH SCIENCE
VOLCANOES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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100, 000-800, 000
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30, 000-100, 000
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20, 000-80, 000
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10, 000-500, 000
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Detailed explanation-1: -Abstract. Stratigraphy and radiocarbon dating of pyroclastic deposits at Merapi Volcano, Central Java, reveals 10, 000 years of explosive eruptions. Highlights include: (1) Construction of an Old Merapi stratovolcano to the height of the present cone or slightly higher.
Detailed explanation-2: -How Long Does it Take a Volcano to Grow? Volcanoes are created over approximately 10, 000-500, 000 years by thousands of eruptions–each lava flow covering the one before it. In the case of oceanic island volcanoes, lava erupts first from fissures, or cracks, on the deep ocean floor.
Detailed explanation-3: -In total there are 1, 551 volcanoes in the Smithsonian Institution database, used for the map, of which 866 are known to have erupted in the last 10, 000 years.
Detailed explanation-4: -An extinct volcano is “dead”-it hasn’t erupted in the past 10, 000 years and is not expected to ever erupt again. Kohala on the Big Island of Hawaii could be considered an extinct volcano.