Basaltic lavas a. are more viscous than rhyolitic lavas b. contain more silica than rhyolitic lavas c. typically contain a greater proportion of trapped volatiles than rhyolitic lavas d. contain less silica than rhyolitic lavas

The Correct Answer is D

Explanation:

Basaltic lava, or mafic lava, is melted rock magnified in magnesium and iron and silica exhausted.

Basaltic magmas are created by surpassing the softening period of the mantle each by combining energy, converting its creation, or reducing its pressure.

Basaltic magma is created through the dry partial melting of the mantle.

correct answer is option a.

tropopause, stratopause and mesopause have all in common aspect that is point of maximum temperature in its layer of the atmosphere. all layers of atmosphere observe abrupt change in temperature. tropopause is the boundary between troposphere and stratosphere. stratopause is the boundary between stratosphere and mesosphere. mesopause is the boundary between mesosphere and thermosphere. these all boundaries are ranges between altitude of 0 to 80 km.