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Question: The average composition of rocks comprising a large composite cone or stratovolcano is similar to a (an) ________ magma.

Options:

  1.  basaltic
  2.  ultramafic
  3.  andesitic
  4.  rhyolitic

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3. Andesitic

The average composition of rocks comprising a large composite cone or stratovolcano is similar to an andesitic magma.

Andesite is a volcanic rock of intermediate composition. It is a gray to black volcanic rock with between about 52 and 63 weight percent silica (SiO2).

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