File Aplite vihov.jpg right thumb 250px A sample of aplite Image Glacial erratic.jpg thumb right 250px Glacial erratic with the Dike geology dykes of the apliteAplite IPAc en icon p l a t in petrology , the name given to Intrusion intrusive Rock geology rock in which quartz and feldspar are the dominant mineral s. Aplites are usually very fine grained, white, grey or pinkish, and their constituents are visible only with the help of a magnifying lens. Dike geology Dyke s and threads of aplite are commonly observed traversing granitic bodies they occur also, though less frequently, in syenite s, diorite s, quartz diabase s and gabbro s. Aplites usually have a genetic affinity to the rocks they intersect. The aplites of granite areas, for example, are the last part of the magma to crystallize, and correspond in composition to the quartzo feldspathic aggregates that fill up the interspaces between the early minerals in the main body of the rock. They bear a considerable resemblance to the eutectic mixtures which are formed on the cooling of solutions of mineral salts, and remain liquid till the excess of either of the components has separated out, finally solidifying en masse when the proper proportions of the constituents and a suitable temperature are reached. The essential components of aplites are quartz and alkali feldspar the latter usually orthoclase or micro perthite , microcline and albite . Crystallization has been apparently rapid as the rocks are so fine grained , and the ingredients have solidified almost at the same time. Hence their crystal s are rather imperfect and fit closely to one another in a sort of fine mosaic of nearly equi dimensional grains. Porphyritic feldspar s occur occasionally and quartz more seldom but the relation of the aplites to quartz ... length feet in diameter . Less frequently aplite forms stock geology stock s or bosses, or occupies ... rocks ca Aplita de Aplit et Apliit es Aplito eu Aplito fr Aplite it Aplite kk hu Aplit nl Apliet ... more details
Unreferenced date February 2010 Infobox UK place static image name MeldonViaduct.jpg static image width 240 static image caption small Meldon Viaduct from the quarry road small latitude 50.7 longitude 4.05 country England official name Meldon population population ref civil parish Okehampton Hamlets shire district West Devon shire county Devon region South West England os grid reference SX5592 dial code 01837 post town OKEHAMPTON postcode district EX20 postcode area EX constituency westminster Torridge and West Devon UK Parliament constituency Torridge and West Devon Meldon is a village in West Devon in the England English county of Devon . Situated close to Okehampton , its best known feature is the Meldon Quarry , from which granite is still extracted. The now disused Meldon Aplite Quarry has been designated as a Site of Special Scientific Interest because of its exposures of aplite and other rocks. The Dartmoor Railway terminates at Meldon Quarry, the former railway line to Tavistock, Devon Tavistock continuing as a cycle path. The former railway line crosses the River Okement on a spectacular viaduct just before reaching the quarry. In 1850, the civil parish of Oakhampton, or Okehampton, consisted of convert 9552 acre km2 of land, which encompassed several villages including Meldon. The village is now part of the civil parish of Okehampton Hamlets . External links http www.devon.gov.uk etched?url etched ixbin hixclient.exe& IXP 1& IXR 110598 Meldon Community Page http genuki.cs.ncl.ac.uk DEV Okehampton Okehampton1850.html GENUKI Devon Okehampton 1850 http www.stepping stones.co.uk htdocs SendFile.cfm?File 1841 Devonshire index.htm Devonshire 1841 Devon geo stub Devon Category Villages in Devon Category Geology of Devon pl Meldon Devon ... more details
Poikilitic texture refers to crystals, typically phenocryst s, in an igneous rock which contain small grains of other minerals. The texture is most easily observed in petrography petrographic thin section s. In some rocks there seem to be little tendency for the minerals to envelop one another. This is true of many gabbro s, aplite s and granite s. The grains then lie side by side, with the faces of the latter moulded on or adapted to the more perfect crystalline outlines of the earlier. When the smaller idiomorphic crystals of the first formed are scattered irregularly through the larger and less perfect crystals of later origin, the structure is said to be poikilitic . A poikioblast is a larger crystal that contains smaller crystals of other minerals. ref Blatt, Harvey Petrology Igneous, Sedimentary and Metamorphic , page 510. WH Freeman and Company, 2006 ref Poikioblasts are a texture of metamorphic rock s. Ophitic A variety of this, known as ophitic is very characteristic of many diabase s, in which large plates of augite enclose smaller laths of plagioclase feldspar. Biotite and hornblende frequently enclose feldspar ophitically less commonly iron oxides and sphene do so. In peridotite s the lustre mottled structure arises from pyroxene or hornblende enveloping olivine in the same manner. In these cases no crystallographic relation exists between the two minerals enclosing and enclosed . ref name EB1911 1911 article Petrology ref References references Category Petrology petrology stub nl Poikilitisch ... more details
This page is intended to be a list of rock geology rock texture geology textural and morphology morphological terms. compactTOC5 A Cumulate rocks Adcumulate agglomerate Agglomeritic Lustre mineralogy adamantine Adamantine a type of Lustre mineralogy lustre Amygdule Amygdaloidal Anhedral petrology Anhedral Antitaxial veins Aphanitic Aplite Aplitic aplite Augen Augen textured gneiss Axiolitic texture B Botryoidal breccia ted Foliation geology Bedding fissile bedding fissility Boudinage Boudinage boudins C Cataclastic rock Cataclastic Chilled margin Clastic see also breccia Cleavage geology Cleaved crenulation Crenulated Cross bedding Cross stratification also trough cross stratification. Cumulate rock Cumulate see also layered intrusion D Decussate Devitirification devitrified Dendritic texture dendrites Schlieren Diatextite see also schlieren and migmatite E Embayed minerals see rock microstructure igneous texture Euhedral Eutaxitic Epiclastic F Fiamme Foliation geology Foliation Fissile see also Foliation geology Bedding fissility . Fossil iferous G Glomeroporphyritic Gneiss ose gneissic Granoblastic Granophyre Granophyric Granulite Granulitic Graphic texture Graphic H Holocrystalline Hyaline Hyaline texture I Imbricated Imbricate J Joint geology Jointed K L Lepidoblastic Leucocratic see also melanocratic Lineation geology Lineation , lineated Tectonite L tectonite M Cumulate rocks Mesocumulate mylonite Mylonitic N Nematoblastic O Ocelli oolite oolitic see also limestone Ophitic texture Orbicular texture Cumulate rocks Orthocumulate P Panidiomorphic Perthite Perthitic Phaneritic Phyllite Phyllitic Pisolite Pisolitic Porphyroclast ic Porphyroblast ic Porphyritic Porphyritic texture see also Porphyry geology porphyry Ptygmatic folding see migmatite Q Quench textures see obsidian , tachylyte or aphanitic R Rapakivi texture S Sand y Schistose schistosity Shear geology Shear sheared shear fabric slate Slaty cleavage texture slaty cleavage Specular Spinifex texture see al ... more details
Zajacite or Zajacite Ce is a rare radioactive fluoride mineral with formula sodium Na Rare earth element REE sub x sub calcium Ca sub 1 x sub REE sub y sub Ca sub 1 y sub fluorine F sub 6 sub . REE means rare earth element s mostly those belonging to the lanthanide series. It crystallizes in the Hexagonal crystal system trigonal rhombohedral system and has a white vitreous appearance with a conchoid al fracture. It has a Mohs hardness of 3.5 and a specific gravity of 4.44 to 4.55. Zajacite is transparent with Refractive index refractive indices of n 1.483 and n 1.503 and occurs as creamy to white grains and phenocryst s in pegmatite and aplite pods or lenses in a peralkaline igneous intrusion . It was discovered in 1993 at Strange Lake, Quebec Labrador 56 20 N , 64 10 W and was named for Dr. Ihor S. Zajac, who led the expedition responsible for its discovery, and who first recognized the presence of the new mineral. See also List of minerals List of minerals named after people References http www.webmineral.com data Zajacite Ce .shtml Webmineral data http www.mindat.org min 7383.html Mindat w location data coord 56 20 N 64 10 W source enwiki plaintext parser display title name Zajacite Ce discovery Category Lanthanide minerals Category Sodium minerals Category Calcium minerals Category Halide minerals Halide mineral stub ... more details
The Virginia Blue Ridge Railway VBR is a historic intrastate short line railroad that operated in central Virginia in the 20th century. The company was incorporated in 1914, and construction was started in 1915. The VBR extended from Tye River, Virginia Tye River Depot in Nelson County, Virginia Nelson County , where it interchanged with the Southern Railway US Southern Railway , to Massies Mill, Virginia Massies Mill . The railroad followed the course of the Tye and Piney Rivers for several miles before entering the mountains. It was initially built to haul chestnut for lumber out of the heavily timbered Piney River area to local mills until World War I . The chestnut blight wiped out much of the timbered areas. However, the railroad later served several quarries in the area where titanium dioxide and aplite were mined. ref http donsdepot.donrossgroup.net dr012.htm ref It passed through the communities of Roses Mill, Piney River, Canopy, Lowesville, and Buffalo Mine. ref http www.abandonedrails.com article.asp?id 71 ref The line was abandoned in 1980. In the early 21st century, part of the roadbed was being developed as a Rail trail rails to trails project, the Blue Ridge Railway Trail . References reflist http www.cstone.net users nelsonco RailTrail VABRTrail.htm Brief history and information on the trail project http donsdepot.donrossgroup.net dr012.htm Brief history and some photos DEFAULTSORT Virginia Blue Ridge Railway Category Defunct Virginia railroads Category Railway companies established in 1914 Category Railway companies disestablished in 1980 I think US rail stub ... more details
Infobox mineral name Siderophyllite category Silicate minerals Silicate mineral boxwidth boxbgcolor image imagesize caption formula KFe sup sup Al Al sub 2 sub Si sub 2 sub O sub 10 sub F,OH sub 2 sub molweight color Blue green, dark brown, black. habit Micaceous foliated system Monoclinic Prismatic 2 m twinning cleavage Perfect basal fracture Conchoidal mohs 2.5 luster Vitreous to dull refractive n 1.582 n 1.625 n 1.625 opticalprop Biaxial birefringence 0.043 pleochroism streak Greenish gray gravity 3 density melt fusibility diagnostic solubility diaphaneity Transparent to subopaque other references ref http webmineral.com data Siderophyllite.shtml Webmineral ref ref http www.mindat.org min 3651.html Mindat ref ref http rruff.geo.arizona.edu doclib hom siderophyllite.pdf Mineral Handbook ref Siderophyllite is a rare member of the mica group of silicate minerals with formula KFe sup sup Al Al sub 2 sub Si sub 2 sub O sub 10 sub F,OH sub 2 sub . The mineral occurs in nepheline syenite pegmatite s and granite and aplite greisen s. It is associated with microcline and astrophyllite at Pikes Peak, Colorado. It is also found in the alkali pegmatites of Mont Saint Hilaire , Quebec . It was first described in 1880 for an occurrence near Pikes Peak , Colorado . The name derives from the Greek sideros , iron, and phyllon , leaf, in reference to its iron rich composition and perfect basal cleavage crystal cleavage . References references Category Phyllosilicates silicate mineral stub ... more details
sur Bandiat , at the left edge a pink aplite dike Image ApliteRed.jpg thumb left 300px Thin section of pink aplite dike in red facies granodiorite, magnification 1 50. The plagioclase is stained ... grey, in some places pink microgranitic aplite dikes. These usually upright dikes can occasionally ... in the main massif with a pink aplite dike on the lower right Associated with the pink aplite ... affinities . class wikitable Oxide br Weight Microgranite Aplite Lamprophyre CIPW Norm br Percent Microgranite Aplite Lamprophyre SiO sub 2 sub 63,70 72,00 60,00 Q 18,30 32,92 14,45 TiO sub 2 sub ... zones of material weakness aplite s, pegmatite s and lamprophyre s intruded. At the end of the Pennsylvanian ... more details
For other harbours with similar names, see Port Richmond . Also known as the Richmond Deepwater Terminal, the Port of Richmond is located on the James River Virginia James River in Richmond, Virginia , 100 miles from Cape Henry and approximately 78 miles north of Newport News, Virginia . It is located at 77 25 west latitude and 37 27 north longitude and lies adjacent to Interstate 95 in Virginia Interstate 95 . The port is the western terminus for commercial navigation on the James River and is four miles south of the central Richmond Business District . Description The port of Richmond is a domestic and international multi modal freight and distribution center serving waterborne, rail and truck shippers throughout the mid Atlantic region. It handles containers, breakbulk, bulk, neo bulk and livestock cargo. The port has container and general cargo facilities on the James River and is part of a supply chain network of over 600 warehouses. Owned by the City of Richmond, Virginia, it is one of only a few municipality owned ports on the East Seaboard. It is governed by the Port of Richmond Commission with day to day operations managed by Federal Marine Terminals, Inc. Federal Marine Terminals provides exclusive stevedore stevedoring services as well as a full range of supply chain management services including export, packaging and transfer as well as warehouse and inland distribution services. Major port cargo include tobacco, tobacco products, textiles, newsprint, wastepaper, chemicals, steel, steel products, phosphates, forest products, machinery, project cargo, refractory, vehicles, pharmaceuticals, aplite and livestock. Distribution The port provides service to northern Europe, the United Kingdom, Canada, the Mediterranean, the Caribbean, Mexico and South America. Independent Container Line ICL , the port s principal carrier and a leader in ocean transportation, operates four container vessels on a weekly schedule that serve Chester, PA , Richmond, VA , Liverpool, ... more details
Infobox nrhp name Trinity Lutheran Church nrhp type image caption location 31 18 37th St., Astoria, New York lat degrees 40 lat minutes 45 lat seconds 42.31 lat direction N long degrees 73 long minutes 55 long seconds 9.2 long direction W coord display inline,title coord parameters region US type landmark locmapin New York City built 1926 architect Corbusier, John William Cresswell Conable, George architecture Gothic Revival, Collegiate Gothic added May 29, 2008 area less than one acre governing body Private refnum 08000471 ref name nris NRISref 2009a ref Trinity Lutheran Church is a historic Lutheranism Lutheran church building church at 31 18 37th Street in Astoria, Queens , New York . It was designed by John William Cresswell Corbusier and overseen by noted architect George W. Conable 1866 1933 . It was built in 1926 and is a one story Collegiate Gothic in North America Collegiate Gothic style building. It is constructed of brick faced with coursed rubble aplite trimmed in cast stone. The front elevation features a recessed entry with a large window above, framed by two spire s with ornate turret s. The interior is in a Gothic Revival architecture Gothic plan of nave and transept s. ref name nrhpinv ny cite web url http www.oprhp.state.ny.us hpimaging hp view.asp?GroupView 102429 title National Register of Historic Places Registration Trinity Lutheran Church date January 2008 accessdate 2011 01 16 author Virginia L. Bartos publisher New York State Office of Parks, Recreation and Historic Preservation See also cite web url http www.oprhp.state.ny.us hpimaging hp view.asp?GroupView 102319 title Accompanying 10 photos ref It was listed on the National Register of Historic Places in 2008. ref name nris References reflist New York City Historic Sites National Register of Historic Places in New York Queens Category Lutheran churches in New York Category Properties of religious function on the National Register of Historic Places in New York City Category Gothic Revival ... more details
Image Geology of Alderney.png thumb right Rock units of Alderney The geology of Alderney includes similarities in its rock to the neighbouring Normandy and Geology of Guernsey Guernsey . Although Alderney is only five kilometers long, it has a geological history spanning half of the life of the earth. It is part of the Armorican Massif . Geological history Relics of sediments appear as xenoliths in granite s. However the earliest dated rock is the grey coloured Western Granodiorite from Ma 2220 in the Paleoproterozoic . As its name suggests it is found in the west end of Alderney. The xenoliths in it are dark ellipses that demonstrate that the rock has been squashed. This granite in turn was intruded by the Telegraph Bay Granite in the southernmost part of the island. This granite contains 50 mm feldspar crystals. Aplite veins continued from the same magma. The final stage of intrusion was a microgranite forming many dykes. Feldspar in the pink microgranite is only 2 mm big. The next stage of geological history was the intrusion of the Central Diorite Complex that makes up the north and centre of the island. This belongs to the Cadomian Orogeny time at Ma 600 500 . Embedded in the diorite are a couple of large gabbro inclusions, as well as a picrite on the east of Braye Bay. Some of the diorite has orbicular structure , concentric spheres of plagioclase and hornblende rich zones form balls up to 20 cm in diameter. A pale coloured granite intruded on the north the Bibette Head Granite. This contains many xenoliths. Sodium rich dykes then were intruded. In the next stage the terrane was uplifted, and eroded. Fine grained sand that formed quartzite was deposited. Further weathering ensued, with most of this deposit removed and laterite formed. Next a stream channel formed over the land, dumping coarse sand with feldspar. This formed a pink sandstone.The flow came from the northwest, with particles derived from granite and gneiss . initially this filled i ... more details
a dark grey, and the diorite speckled grey. There are also pink and red aplite veins in the igneous complexes up to 5 cm wide. The aplite is the lowest melting remanent of the granite magma, that is poor in volatiles. The aplite minerals include tourmaline , topaz and fluorite . At St Brelade ... . The dykes included a swarm of dolerite dykes, also lamprophyre , feldspar porphyry and aplite ... dykes occur below Le Saut Jeffroi, and south of Le Mont Orgueil. These have a NNE strike. The aplite ... more details
Massies Mill is an unincorporated community in Nelson County, Virginia Nelson County , Virginia , United States . It is located on Route 56 Virginia State Route 56 adjacent to the headwaters of the Tye River . The head of the Virginia Blue Ridge Railway , a now defunct short line railroad , was once located at Massies Mill. In August 1969, tiny Massies Mill, then a village of forty homes ref Category 5 The Story of Camille, Lessons Unlearned from America s Most Violent Hurricane By Ernest Zebrowski, Judith A. Howard Published by University of Michigan Press, 2005 ISBN 0472115251 ref , had the sad distinction of being at or very close to ground zero during of one of the worst natural disasters to strike the Commonwealth of Virginia in the 20th century as the remnants of Hurricane Camille dumped an unprecedented amount of rain on unsuspecting residents as they slept, resulting in flash floods and mudslides which killed dozens of people throughout the county and surrounding areas. History Virginia Blue Ridge Railroad In 1914, a company was incorporated to build a short line railroad which connected Massies Mill to the Southern Railway US Southern Railway , a major trunk line, at Tye River, Virginia Tye River Depot . The Virginia Blue Ridge Railway initially was built to haul chestnut for lumber out of the heavily timbered Piney River area to local mills until World War I . The chestnut blight wiped out much of the timbered areas. However, the railroad later served several quarries in the area where titanium dioxide and aplite were mined. ref http donsdepot.donrossgroup.net dr012.htm ref The VBR also passed through the communities of Roses Mill, Virginia Roses Mill , Piney River, Virginia Piney River , Canopy, Virginia Canopy , Lowesville, Virginia Lowesville , and Buffalo Mine, Virginia Buffalo Mine . It followed the course of the Tye River Tye and Piney River Virginia Piney Rivers for several miles before entering the mountains. ref http www.abandonedrails.com article ... more details
to turn into one form, in the shape of a man. It said the words, Aplite, Aplite . Zhirensakal left ... Aplite was the father and Zhaplit was the mother. He read a prayer and shouted at them and the devils ... more details
This page is intended as a list of all unique rock geology rock types as recognized by Petrology petrologists . Names of non rock types and archaic rock types are given as appendices. Igneous 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. Andesite an Igneous rock Chemical classification Intermediate volcanic rock Anorthosite an igneous rock igneous ultramafic rock composed predominantly of anorthite plagioclase Aplite a very fine grained intrusive igneous rock Basalt a volcanic rock of mafic composition Adakite a class of basalt ic rocks containing relatively small amounts of the trace element s yttrium and ytterbium Hawaiite a class of basalts formed from Ocean Island hot spot magmatism Basanite a volcanic rock of mafic composition essentially a silica undersaturated basalt Boninite a high magnesian basalt dominated by pyroxene Carbonatite a rare igneous rock composed of 50 carbonate minerals Charnockite a rare type of granite containing pyroxene Enderbite a variety of charnockite Dacite a felsic rock felsic to intermediate volcanic rock with high iron content Diabase or dolerite an intrusive mafic rock forming Dike geology dykes or Sill geology sills Diorite a coarse grained intermediate plutonic rock composed of plagioclase, pyroxene and or amphibole Dunite an ultramafic cumulate rock composed of olivine and accessories Essexite a silica undersaturated mafic plutonic rock essentially a foid bearing gabbro Foidolite a plutonic igneous rock composed of 90 feldspathoid minerals Gabbro a coarse grained plutonic rock composed of pyroxene and plagioclase basically equivalent to basalt Granite a coarse grained plutonic rock composed of orthoclase , plagioclase and quartz Granodiorite a granitic plutonic rock with plagioclase orthoclase Granophyre a subvolcanic rock subvolcanic intrusive rock of granitic composition Peridotite ... more details
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