Assertion A Melting point of basic lava flowing out of a volcanic eruption is very low Reason R Basi...........

World Geography (Easy) World Physical Aspects

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Assertion (A) : Melting point of basic lava flowing out of a volcanic eruption is very low.

Reason (R) : Basic lava is found in a liquid form and flows through a large distance before it solidifies.

Both A and R are individually true and R is the correct explanation of A.

Both A and R are individually true but R is not a correct explanation of A.

A is true but R is false.

A is false but R is true.

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Explanation:

A is false but R is true.
The basaltic or basic lava is highly fluid, and their temperature is about 1,000 C. Basaltic lava is poor in silica, but are rich in Iron and manganese.
They have a dark colour and high fluidity. Due to their high fluidity, the basaltic Lava is not very explosive, and they spread over great distances as thin sheets of Lava. The volcano formed by Basic Lava is gently sloping and they form a flattened shield or dome with a wide diameter.