GEOLOGY

Detailed explanation-1: -If the lava is very hot and has a low viscosity (runny with a low gas and silica content) the lava flow is called Pahoehoe .

Detailed explanation-2: -Basaltic Lava Magma that has a lower viscosity and lower silica content produces the volcanic rock called basalt and forms shield volcanoes.

Detailed explanation-3: -Temperature: The hotter the lava, the lower the viscosity (the thinner it is). The cooler the lava, the higher the viscosity (the thicker it is). Composition: he more felsic the lava (the more silica in the lava), the higher the viscosity because silica forms chains in the cooling lava even before it crystallizes.

Detailed explanation-4: -The viscosity of most lava is about that of ketchup, roughly 10, 000 to 100, 000 times that of water.

Detailed explanation-5: -Pahoehoe flows tend to be relatively thin, from a few inches to a few feet thick. In map-view the flows tend to be narrow and elongate.