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Lava Flows. The major eruptive product of Hawaiian volcanoes is lava. Lava flows can form during fountaining eruptions or they can well out of the ground with little or no pyroclastic activity. There are two major types of basaltic lava flow, ' a'a and pahoehoe.ava flows can form during fountaining eruptions or they can well out of the ground with little or no pyroclastic activity.
Magma is called lava after it erupts from a volcano. Different types of eruption result in different types of lava. For example, shield volcanoes such as Kilauea on the island of Hawaii produce large amounts of lava that is less viscous (less sticky) because it has less silica, SiO 2, in it.ava is the molten rock expelled by a volcano during an eruption and the resulting rock after solidification and cooling. This molten rock is formed in the interior of some planets, including Earth, and some of their satellites. The source of the heat that liquefies the rock within the earth is geothermal energy.