For the extinct cephalopod genus, see Andesites . Infobox Rock name Andesite type Igneous image Andesite pmg ss 2006.jpg image caption Photomicrograph of andesite in thin section between crossed polars composition Intermediate composition Intemediate br Major minerals plagioclase often andesine and pyroxene and or hornblende br Accessory minerals magnetite s, biotite , sphene , quartz Image Amygdaloidal andesite.jpg right thumb A sample of andesite dark groundmass with crystal habit List of crystal habits amygdaloidal vesicules filled with zeolite . Diameter of view is 8 cm. File Zarnov.jpg right thumb Andesite Mount arnov Vt nik Andesite IPAc en icon n d s a t is an extrusive igneous, volcanic rock , of intermediate composition , with aphanitic to porphyritic texture. In a general sense, it is the intermediate type between basalt and dacite . The mineral assemblage is typically ... feldspar abundances in andesite and other volcanic rocks are illustrated in QAPF diagram s. Relative ... may be refined according to the most abundant phenocryst . Example hornblende phyric andesite , if hornblende is the principal accessory mineral. Andesite can be considered as the extrusive ... margin of South America . The name andesite is derived from the Andes mountain range. Genesis of andesiteAndesite is typically formed at Convergent boundary convergent plate margins but may occur ..., and may mix with these melts to produce intermediate compositions, typically andesite to trachyte ... composition of andesite and intermediate magmas is the result of fractional crystallisation, assimilation ... to resolve the individual components. In 2009, researchers revealed that andesite was found in two ... to generate andesite crust. ref http newswise.com articles view 547877 Scientists Find Evidence ... crystallization geology Andesite line Porphyry geology Porphyry References Reflist http nsw.royalsoc.org.au ... Andesit is Andes t it Andesite ka he lt Andezitas hu Andezit nl Andesiet ja pl Andezyt ... more details
The andesite line is the most significant regional geologic distinction in the Pacific Ocean basin. It separates the mafic basalt ic volcanic rocks of the Central Pacific Basin from the partially submerged continental areas of more felsic andesite andesitic volcanic rock on its margins. The andesite line parallels the subduction zone s and deep oceanic trench es around the Pacific basin. It is the surface expression of melting within and above the plunging subducting slab. It follows the western edge of the islands off California and passes south of the Aleutian Islands Aleutian arc , along the eastern edge of the Kamchatka Peninsula , the Kuril Islands , Japan, the Mariana Islands , the Solomon Islands , and New Zealand s North Island . The dissimilarity continues northeastward along the western edge of the Andes mountains of South America to Mexico, returning then to the islands off California. Indonesia, the Philippines, Japan, New Guinea, and New Zealand lie outside the andesite line. Within the closed loop of the andesite line are most of the deep troughs, submerged volcanic mountains, and oceanic volcanic islands that characterize the Pacific basin . It is here that basaltic lavas gently flow out of rifts to build huge dome shaped volcanic mountains whose eroded summits form island arcs, chains, and clusters. Outside the andesite line, volcanism is of the explosive type. The Pacific Ring of Fire runs parallel to the line and is the world s foremost belt of explosive volcanism. The term andesite line predates the geologic understanding of plate tectonics . The term was first used in 1912 by New Zealand geologist Patrick Marshall to describe the distinct structural and volcanologic boundary extending from east of New Zealand to Fiji and north of the New Hebrides and the Solomon Islands. References http www.dnzb.govt.nz dnzb default.asp?Find Quick.asp?PersonEssay 3M44 Watters, W. A. Marshall, Patrick 1869 1950 . Dictionary of New Zealand Biography, updated 7 April ... more details
Basaltic andesite is a black volcanic rock containing about 55 silica . Minerals in basaltic andesite include olivine , augite and plagioclase . ref cite web url http www.siskiyous.edu shasta geo glo.htm title Glossary for the Geology of Mount Shasta ref Basaltic andesite can be found in volcanoes around the world, including in Central America ref cite book chapter Petrogenesis of Central American Tertiary ignimbrites and associated Caribbean Sea tephra first B.R. last Jordan coauthors Sigurdsson, H., Carey, S., Lundin, S., Rogers, R.D., Singer, B., Barquero Molina, M. title Geologic and tectonic development of the Caribbean plate boundary in northern Central America editor1 first Paul editor1 last Mann page 161 year 2007 publisher Geological Society of America ref and the Andes . ref cite book chapter Early to middle Miocene backarc magmas of the Neuqu n Basin Geochemical consequences of slab shallowing and the westward drift of South America last1 Kay first1 Suzanne Mahlburg last2 Copeland first2 Peter title Evolution of an Andean margin a tectonic and magmatic view from the Andes to the Neuqu n Basin 35 degrees 39 degrees S lat editor1 last Kay editor1 first Suzanne Mahlburg editor2 last Ramos editor2 first Victor A. page 209 year 2006 publisher Geological Society of America ref Basaltic andesite is common in the volcanoes near McKenzie Pass in Oregon , United States . ref cite web url http vulcan.wr.usgs.gov Volcanoes Oregon HighCascades dee wright observatory.html title Dee Wright Observatory publisher United States Geological Survey accessdate 2011 01 01 ref References reflist basalt Volcanology stub Category Basalt Category Volcanic rocks Category Igneous rocks de Basaltandesit fr And site basaltique ... more details
Orphan date October 2008 Hornblende andesite porphyry is an intermediate volcanic igneous rock . Like most Porphyry geology porphyrys , it cooled at two separate rates, causing two sizes of crystals to be visible. Category Igneous rocks Volcanology stub petrology stub ... more details
italic title Unreferenced date March 2007 For the rock Andesite Taxobox name Andesites status fossil fossil range regnum Animal ia phylum Mollusc a classis Cephalopod a subclassis Ammonoidea genus Andesites genus authority subdivision ranks subdivision Andesites is an extinct genus of cephalopod belonging to the Ammonite subclass. Category Ammonites Ammonite stub eu Andesites pl Andesites ... more details
Orphan date February 2009 The Setouchi Volcanic Belt SVB is a Miocene volcanic belt in southwestern Japan . ref http hakone.eri.u tokyo.ac.jp kazan Vol Vol.45.5 naka.txt Porphyritic Magnesian Andesites in the Setouchi Volcanic Belt Retrieved on 2007 07 08 ref References references External links http arjournals.annualreviews.org doi abs 10.1146 annurev.earth.34.031405.125014 High andesite in the Setouchi Volcanic Belt, southwestern Japan Japan geo stub coord missing Japan Category Volcanic belts Category Volcanoes of Japan ... more details
Summary Sample of bedrock from near summit of O Leary Peak , Arizona. Andesite porphyry geology Porphyry . Collected March 1998 by User Jstuby Jim Stuby User talk Jstuby talk 02 58, 1 November 2008 UTC , uploaded photo by User Jstuby Jim Stuby User talk Jstuby talk 02 58, 1 November 2008 UTC Oct. 2008. Licensing PD self date November 2008 ... more details
In igneous petrology an intermediate composition refers to the chemical composition of a rock that has 52 63 wt Silicon dioxide SiO sub 2 sub being an intermediate between felsic and mafic compositions. Typical intermediate rocks include andesite , dacite and trachyandesite among volcanic rocks and diorite and granodiorite among plutonic rocks. Igneous rocks Category geochemistry Category Igneous rocks Category Intermediate rocks petrology stub de Intermedi res Gestein nl Intermediair gesteente sk Intermedi rna hornina ... more details
oclc 27910629 ref The grey to bluff andesite on Haddington Island is considered by many to be British ... s landmark buildings were faced with Haddington Island andesite the Hotel Vancouver and the British ... products.html Natural Landscape Stones Bedrock Granite Sales, Andesite, Basalt, Rhyolite, Sandstone Vancouver, BC, Canada ref Further information on the historic use of andesite on buildings in Vancouver can be found in the article Andesite in http regardingplace.com ?p 3208 Vancouver ... more details
The Ellesmere Island Volcanics are a Late Cretaceous volcanic group of volcano es and lava flows in the Qikiqtaaluk Region of northern Ellesmere Island , Nunavut , Canada . It is part of the Arctic Cordillera and is among the northernmost volcanism on Earth . Even though these volcanics are about 90 million years old, the volcanoes and cinder are still discernible. ref http www.earth.rochester.edu pmag arctic arctic99 journalchris.html Chris s journal entries Retrieved on 2007 08 05 ref The volcanics of the Maskell Inlet Assemblage are mostly made up of tuff s, with smaller flows. Compositionally these are mostly andesite or undifferentiated andesite basalt . The volcanics on Ellesmere Island has been uncertainly associated to both the early volcanic activity of the Iceland hotspot and the Alpha Ridge . The Ellesmere Island Volcanics are part of the High Arctic Large Igneous Province . See also Portal Volcanism of Canada Volcanism of Canada Volcanism of Northern Canada List of volcanoes in Canada Strand Fiord Formation Iceland plume References Reflist Nunavut coord missing Nunavut Category Volcanism of Nunavut Category Landforms of Qikiqtaaluk Region Category Cretaceous volcanism Category Volcanic groups QikiqtaalukNU geo stub Canada geology stub ... more details
Tricouni Southwest is a term for a basaltic andesite lava flow in the Mount Cayley volcanic field of the Garibaldi Volcanic Belt in southwestern British Columbia , Canada , located south of Tricouni Peak . ref http gsc.nrcan.gc.ca volcanoes cat volcano e.php?id gvb tsw 047 Catalogue of Canadian volcanoes Tricounti Southwest ref See also Portal Volcanism of Canada Volcanism of Canada Volcanism of Western Canada References reflist coord missing British Columbia Garibaldi Volcanic Belt Category Holocene volcanism Category Mount Cayley volcanic field BritishColumbiaCoast geo stub ... more details
Image Bubbles hires.jpg thumb 200px Carbon dioxide escaping from the volcano crater. Northvest Rota is an active submarine volcano located in the Pacific , about 64 km northwest of Rota Virgin Island and 100 km north of Guam . The volcano has been discovered during the expedition of NOAA in 2003 . It consists mainly basalt and andesite, and its peak is 517 m below sea level. Active crater was named Brimstone Pit, located on the southern slope of about 40 m below the summit. Category Active volcanoes cs Northwest Rota fr Northwest Rota 1 sk Northwest Rota ... more details
Painted Peak is a summit topography peak rising from the north part of Russet Hills in the Gallipoli Heights , Freyberg Mountains . Descriptively named by the New Zealand Antarctic Place Names Committee NZ APC on the proposal of P.J. Oliver , New Zealand Antarctic Research Program NZARP geologist who studied the feature, 1981 82. Ignimbrite and dacite breccia cut by dikes of andesite and dacite give the peak many colors. usgs gazetteer antarctica geo stub coord 72 27 S 163 45 E display title Category Mountains of Antarctica ... more details
Unreferenced date December 2009 Orphan date December 2009 Image Paliokastro.jpg thumb right The Acropolis Palaiokastro in Methana Image Paliokastro methana.jpg thumb right Acropolis of ancient Methana is located 1 km from the town of Megalochori Methana , Greece Megalochori in the volcanic peninsula of Methana . It was first built in the Mycenean civilization Mycenean times . It was rebuilt and destroyed later during the Roman Empire Roman and the Byzantine Empire Byzantine times. It was built from andesite and dacite rocks from the volcanic mountain nearby. The small acropolis is located on a small lava dome . Around the acropolis, Pausanias described the ancient market Agor and a sanctuary of Isis and Hermes . Remains of the ancient town Methana can be found around the Paliocastro and some Roman columns in front of the little St. Niclaus chapel. Category Ancient Greek buildings and structures Category Troizina area Greece geo stub ... more details
Unreferenced date December 2009 Coord 42 36 8 N 23 17 21 E region BG display title Image Kominite.jpg thumb right Kominite Lang bg , meaning The Chimneys are several minor andesite peaks in Vitosha Mountain near Sofia , Bulgaria . They are situated in the upper valley of the Dragalevska River near Bay Krastyo tourist site. They are the nearest and most easy accessible climbing area near Sofia with climbing routes of II VIII UIAA and 50 100 m high. Easily accessible from Dragalevtsi via Bay Krastyo or Goli Vrah chair lift stations. Komini Peak on Livingston Island in the South Shetland Islands , Antarctica is named for Kominite. Category Landforms of Bulgaria Category Vitosha Bulgaria geo stub Climbing stub ... more details
Infobox mountain name Kebeney photo photo caption elevation m 1,527 elevation ref prominence location Kamchatka Peninsula Kamchatka , Russia range Sredinny Range coordinates coord 57.10 N 159.93 E type mountain topo type Shield volcano age last eruption Unknown first ascent easiest route Kebeney lang ru is a shield volcano located in central Sredinny Range , in the northern part of the Kamchatka Peninsula , Russia . It is a basalt ic Andesite andesidic shield volcano with a number of cinder cone s on its flanks, aligned along the Sredinny Range NE SW axis. See also List of volcanoes in Russia References cite gvp vnum 1000 50 title Kebeney Category Mountains of Russia Category Volcanoes of Kamchatka Category Shield volcanoes KamchatkaKrai geo stub nl Kebenej nn Kebenej ru sk Kebenej ... more details
Son is a town in Son District, Veraguas , Panama . coord 8 01 N 81 19 W display title region PA type city source GNS enwiki Sona city is located in Panama. It has been intermittently exploited by artisanal placer gold operations since Spanish colonial times. In the 1990s, Cyprus Minerals conducted stream sediment, soil and rock sampling on Sona. This work defined a 200 m by 300 m gold anomaly in soils, with assays up to 4.40 g t Au. Oro Gold s work has confirmed the soil anomaly, with rock chip results up to 4.05 g t Au. All three new anomalies are located outside the soil anomaly identified by Cyprus. Mapping shows the property is underlain by granodiorite to monzonite intrusive rocks with andesite flows and tuffs. Category Populated places in Panama panama geo stub ... more details
Cauldron Dome is a tuya in the Mount Cayley volcanic field , British Columbia , Canada . Cauldron Dome is made of coarsely plagioclase orthophyroxene phyric andesite lava flows and last erupted during the Holocene . ref cite ccv id gvb cdm 023 title Cauldron Dome ref It is in the Garibaldi Volcanic Belt , the northern extension of the Cascade Volcanoes Cascade Volcanic Arc in the United States . See also Portal Volcanism of Canada List of volcanoes in Canada Volcanism of Canada Volcanism of Western Canada References reflist coord 50 9 20 N 123 19 10 W display title Category Volcanoes of British Columbia Category Mountains of British Columbia Category Tuyas Category Pleistocene volcanoes Category Holocene volcanoes Category Polygenetic volcanoes Category Mount Cayley volcanic field Pacific Ranges Garibaldi Volcanic Belt BritishColumbiaCoast geo stub ... more details
The Red Lake greenstone belt is an Archean greenstone belt at the town of Red Lake, Ontario Red Lake in Northwestern Ontario , Canada . It consists of basalt ic and komatiite komatiitic volcanics ranging in age from 2,925 to 2,940 million years old and younger rhyolite andesite volcanics ranging in age from 2,730 to 2,750 million years old. ref http www.cseg.ca conventions abstracts 2004 2004abstracts 055S0131 Zeng F Abstract Tomograpy.pdf Fafu Zeng and Andrew J. Calvert, A Combined Seismic Tomographic and Reflection Imaging Across the Red Lake Greenstone Belt Using LITHOPROBE Line 2B, abstract ref See also Portal Volcanism of Canada Volcanism in Canada List of greenstone belts References reflist coord missing Ontario Greenstone belts Category Volcanism of Ontario Category Greenstone belts Category Mesoarchean volcanism Category Neoarchean volcanism Canada geology stub ... more details
Refimprove date June 2009 Infobox mountain name Musa River photo photo caption elevation m 808 elevation ref location New Guinea , Papua New Guinea range coordinates coord 9.308 S 148.13 E type mountain name Musa River coordinates ref ref http www.volcano.si.edu world volcano.cfm?vnum 0503 02 ref type Hot spring s ref http www.volcano.si.edu world volcano.cfm?vnum 0503 02 ref age last eruption Unknown ref http www.volcano.si.edu world volcano.cfm?vnum 0503 02 ref Hot springs and thermal vents at Musa River have no obvious connection to recent volcanic activity. Basement rocks are Metamorphic rock metamorphic schist s, and Tertiary period andesite andesitic volcanics are found less than 1 km away. See also List of volcanoes in Papua New Guinea Notes reflist Category Volcanoes of Papua New Guinea ... more details
The Takla Group is a group of basalt and andesite lava flows, pyroclastic rock s, volcanogenetic sandstone s and argillite s in north central British Columbia , Canada , covering more than convert 30000 km2 mi2 abbr on of the Stikinia terrane in a belt up to convert 50 km mi abbr on wide and over convert 800 km mi abbr on long. ref http article.pubs.nrc cnrc.gc.ca RPAS rpv?hm HInit&afpf e99 048.pdf&journal cjes&volume 36 Upper Triassic Takla Group volcanic rocks, Stikine Terrane, north central British Columbia geochemistry, petrogenesis, and tectonic implications ref See also Portal Volcanism of Canada Volcanism of Canada Volcanism of Western Canada References reflist Category Volcanism of British Columbia Category Triassic volcanism Category Volcanic groups Category Northern Interior of British Columbia BritishColumbiaInterior geo stub Canada geology stub ... more details
Infobox mountain name Castle Peak photo Castle Peak from Andesite Peak.jpg photo caption Castle Peak from Andesite Peak elevation ft 9109 elevation ref NAVD88 ref name ngs cite ngs id KS2001 designation Castle Peak accessdate 2009 07 04 ref prominence listing Sierra Peaks Section List ref name SPS cite sps accessdate 2009 07 04 ref location Nevada County, California Nevada County , California , United States USA range Sierra Nevada U.S. Sierra Nevada coordinates coord 39.365485408 120.349175794 format dms region US CA type mountain source ngs display inline,title ref name ngs topo United States Geological Survey USGS Norden type age first ascent easiest route Exposed scramble Yosemite Decimal System YDS class 3 ref name SPS Castle Peak is a mountain in California s Sierra Nevada U.S. Sierra Nevada near I 80, Donner Pass and the Nevada border. It is in the Tahoe National Forest ref name pb cite peakbagger pid 2551 name Castle Peak, California accessdate 2009 12 18 ref not far off the Pacific Crest Trail . It was originally named Mount Stanford by the California Geological Survey Whitney Survey of 1860 74. References reflist External links cite gnis id 258063 name Castle Peak accessdate 2009 12 18 cite web url http www.summitpost.org show mountain link.pl mountain id 2789 title Castle Peak publisher SummitPost.org accessdate 2009 12 18 cite web url http www.trailspotting.com 2007 10 castle peak.html title Castle Peak Trail publisher Trailspotting accessdate 2009 12 18 NevadaCountyCA geo stub Category Mountains of the Sierra Nevada U.S. ... more details
Infobox Australian Place type suburb name Taylor city Canberra state Australian Capital Territory image Taylor ACT.jpg lga Gungahlin est 1991 postcode 2913 pop propval near nw near n near ne near w near e Moncrieff, Australian Capital Territory Moncrieff near sw Casey, Australian Capital Territory Casey near se Ngunnawal, Australian Capital Territory Ngunnawal near s Ngunnawal, Australian Capital Territory Ngunnawal Taylor is a designated suburb in Gungahlin district Gungahlin , Canberra though the first land release is yet to be announced. The suburb is named after magazine publisher Florence Mary Taylor Florence Taylor OBE , who was editor of and writer for several Australian building industry journals including the influential Building magazine. The suburb is approximately 4 km from the Gungahlin Gungahlin Town Centre and 16 km from the centre of Canberra and bounded by Horse Park Drive. The suburb is located in north Gungahlin adjacent to the existing suburb of Ngunnawal, Australian Capital Territory Ngunnawal and the future suburbs of Casey, Australian Capital Territory Casey and Moncrieff, Australian Capital Territory Moncrieff . History Until 1991, the suburb Taylor was part of the former Gold Creek a 1,594 hectare rural property with the Gold Creek Homestead, Australian Capital Territory Gold Creek Homestead at its centre. ref Newman Chris 2004 , Gold Creek, Reflections of Canberra s Rural Heritage , Gold Creek Homestead Working Group. ref Geology The rocks in Taylor are from the late middle Silurian period. Hawkins volcanics green grey dacite and quartz andesite are in the west. The Canberra Formation is separated by a fault in the east side. It consists of slate y shale and mudstone , with north east trending bands of acid volcanics dacite and andesite . References reflist 1 refbegin See also Geology of the Australian Capital Territory Canberra geo stub coord 35 09 S 149 06 E region AU type city source GNS enwiki display title Category Suburbs of ... more details
basalt and basaltic andesite flows from the High Cascade Range. ref name USFS 4 to 9 million year old basalt and basaltic andesite flows with lesser amounts of andesite and dacite . These rocks ... Cascades. ref name USFS 9 to 18 million year old basalt, basaltic andesite, and andesite lavas ... more details
periods of activity. Initial 1.2 million years ago eruptions constructed a hornblende andesite stratovolcano ... westward, where 0.3 million years ago eruptions of andesite dacite lavas and Pel an eruption ... biotite andesite flows, which spread 6 kilometers northwest and southwest from the breached lava ... more details
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