Differences in the size, shape, and eruptive style of shield volcanoes as compar
ID: 113294 • Letter: D
Question
Differences in the size, shape, and eruptive style of shield volcanoes as compared to composite volcanoes (stratovolcanoes) are
primarily due to differences in _______________.
Question 10 options:
the temperature of their magma chambers
the silica content of their magmas and lavas
the size of their magma chambers
the size of their craters
None of the above
a)the temperature of their magma chambers
b)the silica content of their magmas and lavas
c)the size of their magma chambers
d)the size of their craters
e)None of the above
Explanation / Answer
Basing on the silica content rocks are classified as acidic ,Intermediate, basic types.
Because silica is the most abundant mineral in the earth.
coming to volcanoes are classified basing on their size,shape,and type of erruption and percentage of silica content also.
These stratovolcanoes are comes under the type of composite volcano or conical volvcano(basing on shape).
The highly viscous lava flows through them it cools and solidified before spreading in to the so far distance .
Based on the percentage of silica content the magma is acidic to Intermediate with some minute content of other minerals.
Ex:- plagiaclose feldphar group ANDASINE is an example of acidic magmatic rock or DIOLITE its volcainic equallent.
silica(quartz) group GRANITE is an example of Intermediate magmatic rock or RHYOLITE its volcainic equallent.
So basing on the above factors these stratovolcanoes are classified basing on the silica content of their magmas and lavas.
Answer:- b
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