It's a mere openings of any shape or size which act as avenues for the magma to rise and spread upon earth's surface in the form of lava.
A. Swamp
B. Reef
C. Moraine
D. Volcano
Answer: Option D
Related Questions on Mining Geology
On the basis of which content the igneous rocks are classified as acid rocks and basic rocks?
A. Magnetite
B. Hematite
C. Bauxite
D. Silica
Origin of Solar System divided in two groups, which are
A. Evolutionary and catastrophic
B. Nebula and gaseous tidal hypo
C. Jeansand Jeffires
D. A and B both
A. Attrition
B. Deflation
C. Denudation
D. Mantle
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