Lava Flows and Lava Domes 1
Lava Flows and Lava Domes 1 : Lava flows are hot streams of molten rock that travel down valleys on the slopes of volcanoes. The distance lava flows travel depends on the viscosity ('stickiness') of the lava. If the lava is viscous (sticky) it cannot flow easily so it tends to form short thick lava flows or pile up around the vent to form a hill, or lava dome. Lava flows generally move slowly and therefore usually pose little hazard to humans, although they destroy everything in their path and can cause forest fires. However, viscous (sticky) lava flows and domes can be hazardous as their steep sides often become unstable and can collapse, causing a type of small pyroclastic flow known as a block and ash flow. Lava flows are uncommon on the volcanoes of the Lesser Antilles but lava domes are abundant and their collapse has caused significant loss of life
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