Q. Consider the following statements with respect to the types of Volcanoes:
Which of the above statements is/are correct?
Q. Consider the following statements with respect to the types of Volcanoes:
Which of the above statements is/are correct?
The correct option is C 1 and 3 only
Explanation:
Statement 1 is correct: A shield volcano is a type of volcano usually built almost entirely of fluid lava flows and hence low viscosity. They have very gentle slopes and are developed horizontally. Shield volcanoes are built by effusive eruptions, which flow out in all directions.
Statement 2 is incorrect: Composite volcanoes are characterized by the eruption of cooler and more viscous lavas than basalt. These volcanoes often result in explosive eruptions. Along with lava, large quantities of pyroclastic materials and ashes also come out.
Statement 3 is correct: Caldera volcanoes are the most explosive of all volcanoes and affect the surrounding environment. They are usually so explosive that when they erupt they tend to collapse on themselves rather than building any structure. The lava is blown violently into the air, and the pieces rain down around the vent.
Explanation:
Statement 1 is correct: A shield volcano is a type of volcano usually built almost entirely of fluid lava flows and hence low viscosity. They have very gentle slopes and are developed horizontally. Shield volcanoes are built by effusive eruptions, which flow out in all directions.
Statement 2 is incorrect: Composite volcanoes are characterized by the eruption of cooler and more viscous lavas than basalt. These volcanoes often result in explosive eruptions. Along with lava, large quantities of pyroclastic materials and ashes also come out.
Statement 3 is correct: Caldera volcanoes are the most explosive of all volcanoes and affect the surrounding environment. They are usually so explosive that when they erupt they tend to collapse on themselves rather than building any structure. The lava is blown violently into the air, and the pieces rain down around the vent.
