flow banding


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flow banding

[′flō ‚band·iŋ]
(geology)
An igneous rock structure resulting from flowing of magmas or lavas and characterized by alternation of mineralogically unlike layers.
References in periodicals archive ?
These structures, caused by explosive eruptions of F-rich rhyolite lava, are approximately 6.5 million years in age, and are characterized throughout the area by complex flow banding. At outcrop scale, the flow banding is one of the most distinct features of Topaz Mountain and appears to have provided pathways for vapor transport, with crystal-lined vugs concentrated along the flow banding.