Chapter 1. Volcanoes

Map Learning Exercises
Question 1 of 2

Volcanoes: Locations of andesitic volcanism

Click on two locations you would expect to find andesitic volcanism.

Consider this map of the Earth showing oceans, continents and tectonic plates. Each red dot is the location of a volcano.

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{"title":"selection","description":"Correct. This is a convergent plate boundary with subduction with andesitic magma.","type":"correct","color":"#99cc00","code":"[{\"shape\":\"poly\",\"coords\":\"11,77,81,73,74,109,2,105\"},{\"shape\":\"poly\",\"coords\":\"154,136,131,184,160,172,197,192,225,174,259,189,278,201,298,205,286,238,305,252,321,183,298,180,292,194,283,172,227,156,209,156,228,119,225,145,244,146,236,108,270,61,279,37,266,27,211,104,188,124,196,145,194,174,173,168,161,138\"},{\"shape\":\"poly\",\"coords\":\"395,101,415,90,384,50,374,55\"},{\"shape\":\"poly\",\"coords\":\"368,37,369,30,346,16,327,45,312,58,285,52,283,65,310,70,335,58,348,43\"},{\"shape\":\"poly\",\"coords\":\"420,123,416,134,455,154,461,159,463,182,477,198,473,226,469,256,472,274,493,290,498,278,481,264,488,230,495,195,474,174,503,140,492,122,478,134,489,153,476,151,443,132\"},{\"shape\":\"poly\",\"coords\":\"547,271,542,268,551,301,571,281,555,269\"}]"} {"title":"Hotspot","description":"These volcanoes are not near a trench indicating a convergent plate boundary, so they are likely formed by a hotspot.\n","type":"incorrect","color":"#993300","code":"[{\"shape\":\"poly\",\"coords\":\"306,117,309,132,345,140,346,122\"},{\"shape\":\"circle\",\"coords\":\"451,166,8\"},{\"shape\":\"circle\",\"coords\":\"465,224,10\"},{\"shape\":\"circle\",\"coords\":\"572,115,10\"},{\"shape\":\"circle\",\"coords\":\"552,87,14\"},{\"shape\":\"circle\",\"coords\":\"569,25,17\"}]"} {"title":"Divergent","description":"These volcanoes are formed where there is extension.\n","type":"incorrect","color":"#333300","code":"[{\"shape\":\"poly\",\"coords\":\"52,109,67,111,88,150,81,174,74,197,57,184,38,189,43,165,55,162,51,140,58,130\"},{\"shape\":\"poly\",\"coords\":\"419,111,421,134,410,134,397,114,417,99\"}]"}
Correct.
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