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#	Item
31	USGS Geologic Investigations Series I-2780, sheet 2 of 2 Add to Reading List Source URL: pubs.usgs.gov Language: English - Date: 2004-11-05 18:03:26 Volcanic rocks Volcanology Igneous rock Andesite Porphyry Dacite Basalt Petrology Igneous petrology Geology
32	Alaska Resource Data File Melozitna quadrangle Descriptions of the mineral occurrences shown on the accompanying figure follow. See U.S. Geological Survey[removed]for a description of the information content of each fiel Add to Reading List Source URL: ardf.wr.usgs.gov Language: English - Date: 2012-07-25 12:39:35 Volcanic rocks Volcanology Igneous rock Dacite Mineral exploration Gold Limonite Rhyolite Tuff Petrology Igneous petrology Geology
33	UNITED STATES DEPARTMENT OF THE INTERIOR GEOLOGICAL SURVEY DETECTION AND MAPPING OF HYDROTHERMALLY ALTERED ROCKS IN THE VICINITY OF THE COMSTOCK LODE, VIRGINIA RANGE, NEVADA, USING ENHANCED LANDSAT IMAGES Add to Reading List Source URL: pubs.usgs.gov Language: English - Date: 2010-11-18 19:26:32 Cartography Landsat program Multispectral image Multispectral Scanner Dacite Igneous rock Petrology Igneous petrology Imaging
34	Table 1. Radiometric ages from the Western Aleutian Islands, Alaska [Quad is 1:250,000-scale quadrangle; AD, Adak; AT, Attu; GI, Gareloi Island; KK, Kiska; RI, Rat Island; Longitude if negative is degrees W, if positive Add to Reading List Source URL: pubs.usgs.gov Language: English - Date: 2006-09-18 15:00:01 Volcanology Volcanic rocks Andesite Dacite Lava Basalt Petrology Igneous petrology Geology
35	USGS Open-File Report[removed], table 1 Add to Reading List Source URL: pubs.usgs.gov Language: English - Date: 2008-02-20 22:33:31 Granodiorite Dacite Diorite Monzonite Petrology Igneous petrology Volcanic rocks
36	Geologic Map of the Tularosa Mountains 30′ Z 60′ Quadrangle, Catron County, New Mexico Compiled by James C. Ratté Prepared in cooperation with the Add to Reading List Source URL: pubs.usgs.gov Language: English - Date: 2002-06-25 11:37:03 Volcanic rocks Volcanology Tephra Dacite Rhyodacite Aphanite Rhyolite Andesite Igneous rock Petrology Igneous petrology Geology
37	KSM Volcanic and Intrusive Rock Chemistry • Intrusive rocks at KSM are similar to the lower part of the Jurassic Hazelton Group volcanic rocks: o Dacite and Trachyandesite composition (quartz syenites) o moderate en Add to Reading List Source URL: seabridgegold.net - Date: 2014-02-03 09:25:06
38	Contrib Mineral Petrol[removed]: 315±331 Ó Springer-Verlag 1999 Elizabeth Cottrell á James E. Gardner Malcolm J. Rutherford Add to Reading List Source URL: mineralsciences.si.edu Language: English - Date: 2006-09-22 15:52:18 Volcanic rocks Volcanology Igneous rocks Rhyodacite Dacite Basalt Andesite Phenocryst Scoria Petrology Igneous petrology Geology
39	Geologic and Aeromagnetic Maps of the Fossil Ridge Area and Vicinity, Gunnison County, Colorado By Ed DeWitt,1 R.S. Zech,1 C.G. Chase,2 R.E. Zartman,3 R.P. Kucks,1 Bruce Bartleson,4 G.C. Rosenlund,5 and Drummond Earley, Add to Reading List Source URL: pubs.usgs.gov Language: English - Date: 2003-12-02 18:10:24 Volcanic rocks Igneous rocks Latite Quartz latite Geochemistry Granite Dacite Rhyodacite Porphyry Petrology Igneous petrology Volcanology
40	The Laramide Mesa Formation and the Ojo de Agua Caldera, Southeast of the Cananea Copper Mining District, Sonora, Mexico Scientific Investigations Report[removed] Add to Reading List Source URL: pubs.usgs.gov Language: English - Date: 2006-07-21 12:24:09 Volcanic rocks Volcanology Igneous rocks Economic geology Dacite Rhyodacite Porphyry Andesite Cananea Municipality Petrology Igneous petrology Geology

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