EOSC 114 Study Guide - Volcanic Gas, Strombolian Eruption, Vulcanian Eruption
Document Summary
Extrusive (fine grained) lavas typically have very small sizes of crystals: lava flows results when magma that is relatively low in gas content erupts effusively at earth"s surface, pahoehoe the surface of a lava flow maybe ropy texture and smooth & low viscosity , aa a lava flow with a rubble y flow top consisting of broken fragment of lava and roug & higher viscosity than pahoehoe , volcanic glass the magma solidifies into glass, a supercooled liquid, obsidian: massive glass (dark, pumice: massive glass with many bubbles (vesicles) (porous and light, pyroclastic material refers to fragments of all sizes that are erupted explosively out of a volcano.
