Q49
Shield volcanoes refer to ________
A.
Explosive lava eruptions
B.
Repeated lava flows
AnswerC.
Ejection of a wide range of pyroclastic materials
D.
Individual lava flows
Answer: Option B
Solution
Answer: Option B
Solution:
Shield volcanoes are formed by lava flows of low viscosity - lava that flows easily. Consequently, a volcanic mountain having a broad profile is built up over time by flow after flow of relatively fluid basaltic lava issuing from vents or fissures on the surface of the volcano.