Question

Choose the magma type which is most viscous: basaltic andesitic rhyolitic

Answer 1

Answer:

Option (3)

Explanation:

Rhyolitic magma is the most viscous and rhyolite is the volcanic equivalent of granite. In the case of Rhyolitic magma, the silica content is more than 65%. This type of magma generally forms because of the wet melting of continental crust. This magma when traps gas in it or it comes in contact with water, then it becomes highly explosive and violent, producing a large amount of pyroclastic materials. It leads to the production of rocks such as Pumice along with other ash deposits.

Thus, the Rhyolitic type of magma is highly viscous.

Thus, the correct answer is option (3).

Answer 2

This question is probably from Oddessyware or QDA  I just had the same question. The answer is rhyolitic because it is high in viscous, Silica content, gas content, and explosiveness.