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Topic: Quartzite

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	Quartzite
		Pure quartzites are a source of silica for metallurgical purposes and for the manufacture of brick.
		In microscopic section the clastic structure of some quartzites is well preserved; the rounded sand grains are seen with quartz overgrowths deposited in crystalline continuity, so that optical properties of the grains are similar to those of the material surrounding them.
		Many quartzites, however, have been crushed, and the quartz largely is a mosaic of small, irregularly shaped crystalline fragments with interlocking margins.
	geology.csupomona.edu /alert/metamorphic/quartzite.htm (225 words)

	QUARTZITE - LoveToKnow Article on QUARTZITE (Site not responding. Last check: )
		As distinguished from sandstones, quartzites are free from pores and have a smooth fracture, since when struck with the hammer they break through the sand grains, while in sandstones the fracture passes through the cementing material and the rounded faces of the grains are exposed, giving the broken surface a rough or granular appearance.
		Instances are the Lickey quartzite of Shropshire, the Holyhead quartzite of Anglesey, the Durness quartzite of Sutherlandshire, the Banifshire and Perthshire quartzites and the Cherbourg quartzite.
		Quartzites are too hard and splintery to be used as building stones to any large extent: they furnish a thin and very barren soil, and because they weather slowly tend to project as hills or mountain masses.
	www.1911encyclopedia.org /Q/QU/QUARTZITE.htm (466 words)

	Quartzite - Wikipedia, the free encyclopedia
		Quartzites often occur in various shades of pink and red due to varying amounts of iron oxide.
		Quartzite is very resistant to chemical weathering and often forms ridges and resistant hilltops.
		In the United States, formations of quartzite can be found in eastern South Dakota, southwest Minnesota, the Wasatch Range in Utah, and as resistant ridges in the Appalachians and other mountain regions.
	en.wikipedia.org /wiki/Quartzite (323 words)

	Quartzite Necklace; Gemstones for Physical Healing
		Quartzite is placed on a localized area of the body or worn around the neck to anchor and stabilize the positive changes resulting from another life-giving therapy with either a physical or inner focus.
		Quartzite is held on the brow to highlight and "download" the frequency picture of the earlier, healthier state into the brain and body.
		Quartzite is used to relieve tension or pain in the head, neck, or shoulders or to ease insomnia or a feeling of being wired.
	www.gemstonetherapy.com /gem_summaries/quartzite_SUM.htm (1295 words)

	Geology by Lightplane
		The quartzite is unconformably overlain by marine sandstone of Upper Cambrian age; it is the darker brown unit under the green vegetation.
		The quartzite is unconformably overlain by horizontal Cambrian sandstone.
		The quarry is in the Baraboo Quartzite (Precambrian) on the south limb of the Baraboo Syncline.
	www.geology.wisc.edu /~maher/air/air14.htm (1803 words)

	Quartzite
		Often they rock has a granular appearance on a weathered surface, but along a broken surface the sand grains are usually split.
		Also, unlike most of the nondescript rocks, quartzite has a glassy luster.
		Quartzite results from the almost any metamorphism of a quartz sandstone, and as such have no specific tectonic association or meaning.
	csmres.jmu.edu /geollab/Fichter/MetaRx/Rocks/quartzite1.html (92 words)

	Building Stone Magazine: Quartzite
		Quartzite is a metamorphic rock heated under pressure deep within the earth's mantle where the original quartz sand grains and quartz silica cement became fused into one.
		Normally quartzite is white or light grey, but it may be found in a variety of other colors including yellow, light brown, blue, green, purple, fl, shades of pink or red depending on the other minerals such as mica, tourmaline, zircon or iron oxide that may be present.
		Quartzite may not be as well known as its more famous brothers and sisters granites, marbles and limestones —; but its unique characteristics of hardness, durability and its clean fine-grained texture make it the stone of choice for many challenging projects that require a different aesthetic appeal.
	www.buildingstonemagazine.com /ond-05/quartzite.html (2214 words)

	Aqua Botanic - Stone Definitions
		The metamorphic rock quartzite is formed from sandstone or chert that has been heated and recrystallized during metamorphic episodes such as regional deformation or contact with molten rock.
		Quartzite from impure sandstones (containing mica or feldspar) may grade into other metamorphic rocks, such as schist or gniess.
		Quartzite formed during regional deformaion shows the pressure or stress of metamorphism in elongated and parallel quartz grains or in a preferred orientation of the crystallographic axes of quartz grains of any shape.
	www.aquabotanic.com /stone.htm (356 words)

	Quartzite (Site not responding. Last check: )
		Unlike sandstones, quartzites are free from pores and have a smooth fracture; if struck with a hammer they break through the grains, whereas in sandstones the fracture passes through the cementing material and the rounded surfaces of the grains are exposed, giving the broken surface a rough and granular appearance.
		Many quartzites, however, have been crushed and the quartz consists in large part of a mosaic of small crystalline fragments of irregular shape with interlocking margins; these are the "sheared quartzites"; and if they contain white mica in parallel crystalline flakes they become more fissle and pass into quartz schists.
		Quartzites are snowny white, less often pink or gray; they commonly have a fine angular jointing and break up into rubble under the action of frost.
	syninfo.com /Crystal/xls013.htm (407 words)

	Quartzite from the Tusimice mining site (Bohemia, Czech Republic) on Flintsource.Net
		After reaching the sandstone, the quartzites were extracted by cutting a deep groove around the nodule, which was then broken by a blow from the side.
		Finds of Tušimice quartzite in Neolithic contexts are known up to 240 kilometers from its source near Kramolín in Moravia (Oliva 1990, cited in Malkovský and Vencl 1995) and is regularily found in all of Bohemia, reaching the well known site of Bylany, over 140 kilometres to the South-East.
		On the other hand, Tušimice quartzite is probably much more abundant in the regions adjacent to Bohemia, but it is either not noticed, confused with other raw materials, or worse, downright ignored like in Pratsch 1999.
	www.flintsource.net /quart/CZ_tusi.html (2026 words)

	A Geologic Tour of the Baraboo Ranges and Devil's Lake Gorge
		The ranges are composed of a metamorphic rock, the Baraboo Quartzite, and owe their existence to the great strength of this material.
		The underlying geologic structure (that is, the manner in which the quartzite and other rock layers are lying) explains both the overall oval form of the ranges and the fact that the South Range is by far the wider and most continuous of the two ranges.
		The talus, or quartzite blocks, that mantles the sides of the gorge is also very impressive as we will see.
	www.uwmc.uwc.edu /geography/baraboo/baraboo.htm (1653 words)

	Features Item : Quartzite interior makes an impression (Site not responding. Last check: )
		Quartzite tile in green and gold was specified for the interior flooring in the lobby of the Credit Suisse office building because of its hard and non-slip surface.
		Originally Chinese quartzite was specified, however due to the short amount of time available to complete the project, this quartzite would not make it to the site on time or under budget.
		However, the Brazilians are not used to exporting quartzite to the U.S., and since quartzite is normally used for exteriors instead of interiors, it is often ungauged.
	www.stoneworld.com /CDA/ArticleInformation/features/BNP__Features__Item/0,4046,65139,00.html (882 words)

	NFN - Quartzite Roadless Area, Washington
		The Quartzite roadless area is in the Chewelah Peak watershed in the Colville National Forest, Eastern Washington.
		The Quartzite area is about 5,200 acres in size, but the Forest Service says the roadless area is only about 4,800 acres because of the existence of about 20 stumps.
		Quartzite is in the watershed that surrounds Betts Meadows, which is a wetland restoration project undertaken by private individuals with input from the U.S. Fish and Wildlife Service.
	www.nativeforest.org /campaigns/last_refuge/quartzite.htm (221 words)

	Quartzite (Site not responding. Last check: )
		Quartzite is metamorphosed sandstone, compressed and hardened sand, which in turn is mostly tiny grains of quartz.
		One of the layers is the Palms Quartzite/ Ironwood Iron Formation, which is much harder and resistant to erosion than the layers to either side; this forms the summit line of the Penokee range.
		On the north side the quartzite is bent up almost vertically, while on the larger southern limb of the range the layers have a gentler angle.
	my.execpc.com /~acmelasr/mountains/quartzite.html (880 words)

	quartzite -- Encyclopædia Britannica
		Unlike sandstones, quartzites are free from pores and have a smooth fracture; when struck, they break through, not around, the sand grains, producing a smooth surface instead of a rough and granular one.
		The Pound Quartzite consists of shales and siltstones, limestones, and quartzites; it is notable because from it a very early fossil assemblage, the Ediacara fauna, was recovered.
		The hills are situated on the Deccan Plateau and are composed of quartzites and slates of the Cambrian Period (540 million to 505 million years ago) with interbedded lavas of a younger age.
	www.britannica.com /eb/article-9062184?tocId=9062184&query=null&ct=null (744 words)

	Quartzite of the Becov-type on Flintsource.Net
		It was partly excavated in advance of large-scale quartzite mining for industrial purposes in the sixties, but remains only scantly published (Žebera 1966).
		During this period quartzite from Bečov was one of the favourite raw materials in Bohemia and neighbouring areas.
		At least the attribution of the very long blade to this type of raw material is very dubious as it is finer and less homogeneous than the material from Bečov we have seen and shows clear ochre-coloured schliers more consistent with the description of Kamenná Voda-quartzite.
	www.flintsource.net /quart/CZ_becov.html (2054 words)

	Olympus Microscopy Resource Center: Polarized Light Microscopy Gallery - Staurolite Quartzite
		Quartzite is typically a metamorphic rock mainly or entirely comprised of quartz.
		The purest quartzite is white in color, but the rock may also exhibit a variety of other hues, such as pink, brown, blue, or gray, depending on its minor mineral constituents.
		The purest quartzite is frequently utilized industrially as a silica source, while those that contain impurities are more typically used as a building material.
	www.olympusmicro.com /galleries/polarizedlight/pages/staurolitequartzitesmall.html (234 words)

	Quartzite (Site not responding. Last check: )
		Quartzite is composed of sandstone that has been metamorphosed.
		Quartzite is much harder than the parent rock, sandstone.
		The best way to tell quartzite from sandstone is to break the rocks.
	volcano.und.nodak.edu /vwdocs/vwlessons/lessons/Slideshow/Merocks/Merock6.html (60 words)

	quartzite
		QUARTZITE The parent rock for quartzite is quartz-rich sandstone.
		Quartzite tends to have a sugary appearance, and when broken the fractures cut through the sand grains, not around them as with a sandstone.
		This microscopic, thin-section view of quartzite shows the tight packing and recrystallization of quartz grains characteristic of quartzite.
	seis.natsci.csulb.edu /bperry/metarock/QUARTZITE.htm (180 words)

	Quartzite (Site not responding. Last check: )
		The compact, granular rock is a form of metamorphosed sandstone in which silica, or quartz, has been deposited between the grains of quartz of which the sandstone is essentially composed.
		Other minerals that may be present in small amounts in quartzite include feldspar, mica, rutile, tourmaline, and zircon.
		Quartzite has a smooth fracture and is found primarily among ancient rocks, such as those of the Cambrian or Precambrian system
	www.natural-stone.com /quartzite.html (81 words)

	Quartzite
		Quartzites often preserve original cross-bedding in the sandstone; sometimes deformation during metamorphism makes this cross-bedding look somewhat 'stirred'.
		The way to tell a quartz sandstone from a quartzite is when you break a quartzite, the fracture will cut right through the quartz grains.
		This is a typical quartzite seen in lab: even in enlarged view it is hard to see individual grains.
	www.pitt.edu /~cejones/GeoImages/6MetamorphicRocks/Quartzite.html (297 words)

	Jorde, Martin (Site not responding. Last check: )
		Quartzite, AZ - Martin Jorde, 83, died on November 29, 1999 at Quartzite, AZ.
		Memorial services were held on December 12 in Quartzite, and burial was in the Veterans Cemetery in Medford, OR.
		Martin Albin Jorde was born on May 10, 1916 in Excel township of Marshall county, the son of Carl and Emma (Olson) Jorde.
	www.trftimes.com /obits/Jorde_Martin.htm (174 words)

	Quartzite
		Quartzites are formed through the metamorphism of quartz-rich sandstones.
		Quartzite may sometimes look like marble, but can be distinguished because quartzite cannot be scratched with a knife, unlike marble.
		Quartzite is used in the glass and ceramic industries, and builders sometimes use it for flooring and facing.
	www.es.ucl.ac.uk /schools/Glossary/quartzite.htm (82 words)

	Quartzite (Site not responding. Last check: )
		Quartzite is a non-foliated rock composed of the mineral quartz.
		Quartzite is produced by the metamorphism of quartz sandstones.
		If a piece of quartzite is broken (which is not easy), the fracture occurs within the grains.
	www.jsu.edu /depart/geography/mhill/phylabtwo/lab3/quartzite.html (95 words)

	Quartzite - Freepedia (Site not responding. Last check: )
		Through heating and pressure inside the Earth, the sandstone quartz sand grains and quartz silica were fused into one.
		Because of its hardness, crushed quartzite is often used as railway ballast.
		In the United States, formations of quartzite can be found in eastern South Dakota and southwest Minnesota.
	en.freepedia.org /Quartzite.html (68 words)

	Presenting, Figueiredo's Quartzite Stone.
		In the Mohs Scale of mineral hardness, where 01 is talc, 5.5 is a knife blade and 10 is diamond, quartzite rates at 7, making it one of the most durable and scratch resistant natural ornamental stone available.
		Quartzite stone is almost as hard as a diamond, and completely beautiful.Quartzite is a metamorphic rock formed essentially by quartz.
		Quartzite is one point under a diamond on the hardness scale.
	www.naturalstoneimporter.com /quartzites.html (141 words)

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