solidified pahoehoe lava flow, hawaii big island

active basalt basaltic big billowy black chamber cooled cooling dark earth eruption extrusive flood flow fluid geology geoscience hawaii hawaiian hazards hohala hot hotspot hualalai igneous island kea kilauea lava loa long mafic magma mantle mauna molten mountain national natural ocean olivine pacific pahoehoe park plate plume rocks ropes ropey ropy sciences scientific shield silica smooth solidified spot sticky tectonic viscous volcanic volcano volcanoes