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Rhyolite
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#	Item
21	Hang Hau Formation,34, 36, 37, 38 Hong Kong GeologicalSurvey,3, 8, 10, aerialphotography,15,31,36,37 hydrothermalalteration,30 Add to Reading List Source URL: www.cedd.gov.hk Language: English - Date: 2014-04-27 03:57:35 Volcanic rocks Volcanology Tephra Lapilli Andesite Granite Granitoid Granodiorite Rhyolite Petrology Igneous petrology Geology
22	Classification and Distribution Hatch et at[removed]recommendedthe use of namessuchasrhyolite and basaltas a non-geneticsystemfor both minor intrusions and volcanics. Le Maitre[removed]made recommendationson the classificat Add to Reading List Source URL: www.cedd.gov.hk Language: English - Date: 2014-04-27 03:57:35 Granite Aplite Aphanite Igneous rock Rhyolite Phenocryst Volcanic rock Dike Porphyry Petrology Igneous petrology Volcanology
23	Basaltic rock Description Dark grey, very fine grained, massive, intrusive igneous rock. Key diagnostic features : Add to Reading List Source URL: www.cedd.gov.hk Language: English - Date: 2014-04-27 03:57:35 Igneous rocks Volcanology Volcanic rocks Metamorphic rocks Rhyolite Breccia Rock microstructure Clastic rock Quartz Petrology Geology Igneous petrology
24	Granite Description Light coloured, acid igneous rock composed principally of alkali-feldspar, quartz and biotite, with some plagioclase. Individual crystals in the groundmass are greater than 2 mm diameter on average. M Add to Reading List Source URL: www.cedd.gov.hk Language: English - Date: 2014-04-27 03:57:35 Volcanology Volcanic rocks Phenocryst Rocks Rhyolite Granite Igneous rock Matrix Piégut-Pluviers Granodiorite Petrology Igneous petrology Geology
25	DEPARTMENT OF THE INTERIOR U.S. GEOLOGICAL SURVEY Analytical results for stream sediments, panned concentrates from stream sediments, and rock samples from the Dooley Mountain quadrangle, Baker County, Oregon Add to Reading List Source URL: pubs.usgs.gov Language: English - Date: 2010-11-11 08:28:24 Volcanic rocks Volcanology Tephra Igneous rocks Tuff Breccia Clastic rock Basalt Rhyolite Petrology Geology Igneous petrology
26	U.S. Department of Interior U.S. Geological Survey Interpretive Geologic Map of Mt Ajo Quadrangle, Organ Pipe Cactus National Monument, Arizona by Janet L. Brown Add to Reading List Source URL: pubs.usgs.gov Language: English - Date: 2010-11-30 21:02:48 Volcanology Volcanic rocks Igneous rocks Andesite Porphyry Rhyolite Aphanite Tuff Lava Petrology Igneous petrology Geology
27	EDS Scan: Glass, Rhyolite NMNH[removed]VG-568 Glass, Rhyolite NMNH[removed]VG-568 SiO2: Al2O3: Add to Reading List Source URL: mineralsciences.si.edu - Date: 2014-09-17 16:03:08
28	USGS Certificate of Analysis Rhyolite, Glass Mountain RGM-2 Add to Reading List Source URL: crustal.usgs.gov Language: English - Date: 2014-10-30 15:45:07
29	ReadIng seLectIon BUILDING YOUR UNDERSTANDING IGNEOUS ROCKS Rocks formed by cooling magma or lava are called igneous rocks. Igneous rocks make up most of the Add to Reading List Source URL: www.ssec.si.edu Language: English - Date: 2014-12-09 13:34:16 Volcanology Igneous rock Volcanic rock Magma Basalt Rock Rhyolite Intrusion Granite Petrology Geology Igneous petrology
30	NEWFOUNDLAND & LABRADOR Explore The Opportunities Kim Lake Gold-Antimony ² Add to Reading List Source URL: www.nr.gov.nl.ca Language: English - Date: 2013-02-05 08:59:21 Sulfide minerals Dielectrics Quartz Stibnite Rhyolite Felsic Petrology Crystallography Igneous petrology

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