Llanite

Llanite is a hypabyssally intruded rhyolite with phenocrysts of microcline and euhedral quartz. The quartz crystals are blue hexagonal bipyramids. The unusual blue coloration of the quartz is thought to be due to ilmenite inclusions. It is named after Llano County, Texas, the only place where it is found (according to locals; however, geologists have identified other locations where this rock may be found, according to Robert Reed. A dike of llanite crops out on Texas State Highway 16 about 9 miles north of the town of Llano.

单词	Llanite
释义	Llanite 英语百科 Llanite Llanite is a hypabyssally intruded rhyolite with phenocrysts of microcline and euhedral quartz. The quartz crystals are blue hexagonal bipyramids. The unusual blue coloration of the quartz is thought to be due to ilmenite inclusions. It is named after Llano County, Texas, the only place where it is found (according to locals; however, geologists have identified other locations where this rock may be found, according to Robert Reed. A dike of llanite crops out on Texas State Highway 16 about 9 miles north of the town of Llano.
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