#5. The slopes of the volcanoes of the Andes Mountains that line the west side o
ID: 299240 • Letter: #
Question
#5. The slopes of the volcanoes of the Andes Mountains that line the west side of South America are likely to be composed of which type of igneous rock? Circle or change the font of the correct choice. a. basalt b. granite c. gabbro d. andesite ___________________________________________________________________________________ Mafic minerals produce magma that contains very little dissolved gas. At the surface, mafic magma (lava) flows freely and tends to move a lot way down the mountain before cooling enough to form extrusive igneous rock (basalt). In general, mafic magma is not explosive. Mafic minerals result in broad, gently sloped shield volcanoes. , Felsic minerals produce a lot of dissolved gases when they melt. These gases explosively expand as the magma reaches the surface, similar to releasing pressure by opening a shaken can of soda pop. Felsic minerals produce thick sluggish lava that doesn’t flow very far before it solidifies. The results are stratovolcanoes, which are steep sided as a result of sluggish lava and piled up debris from the explosions. Plate subduction volcanoes are dangerous.
Explanation / Answer
Answer: d. andesite
The slopes of the volcanoes of the Andes Mountains that line the west side of South America are likely to be composed of andesite
Andesite is a volcanic igneous rock.
Andesite name come from andes mountains.
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