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VOLCANOES (Preventive Measures (Avoid all low-lying places, Listen for…

- - - - lava which has solidified as rounded masses, characteristic of eruption under water.
    - - Pahoehoe lava is a common type of basaltic lava that cools down forming typical smooth, billowy, or ropy surfaces. Often, it forms by many small breakouts of lava from an over-crusted inflating flat, irregular flow.
    - - During an eruption, a'a lava comes out of the volcano as a very thick (viscous) lava that travels very slowly. The inside of an a'a lava flow is thick and dense. Surrounding this thick dense core is a sharp spiny surface of cooling rock.