Definition of Vitrophyres. Meaning of Vitrophyres. Synonyms of Vitrophyres

- A vitrophyre is a porphyritic volcanic rock in which phenocrysts are embedded in a gl****y matrix. Vitrophyres are contrasted from typical porphyritic...
- Lunar breccias range from gl****y vitrophyre melt rocks, to gl****-rich breccia, to regolith breccias. The vitrophyres are dominantly gl****y rocks that...
- Rhyolites that cool too quickly to grow crystals form a natural gl**** or vitrophyre, also called obsidian. Slower cooling forms microscopic crystals in the...
- tools Obsidian hydration dating – Geochemical dating method Stone tool Vitrophyre – Gl****y volcanic rock Yaxchilan Lintel 24 – Ancient Maya limestone carving...
- The Newbury Volcanic Complex, also known as the Newbury Formation or the Newbury Volcanics, is a 16 km long, 3 km wide strip of volcanic materials and...
- location for this rock. On Pantelleria the rock is usually found as a vitrophyre containing phenocrysts of anorthoclase or sanidine. Quartz is found only...
- plagioclase-group feldspar is oligoclase Tuff – Rock consolidated from volcanic ash Vitrophyre – Gl****y volcanic rock - Gl****y igneous rock with phenocrysts Websterite –...
- diameter from 0.30 to 4.3 meters occur within a thick layer of rhyolitic vitrophyre. Megaspherulites as large as 0.91 meter occur within rhyolite exposures...
- Pitchstones may also contain phenocrysts, in which case it is a form of vitrophyre. Pitchstone has a resinous lustre, or silky in some cases, and a variable...
- may have gl****y zones near the base and top, called lower and upper 'vitrophyres', but central parts are microcrystalline ('lithoidal'). The mineralogy...