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Topic: Serpentinite

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Gneiss

Schist

Gabbro

Tonalite

Tephrite

Trachyte

Skarn

Syenite

Serpentine

List of rocks

List of stone

Tuff

List of minerals

Chrysoprase

Slate

	CVO Website - Serpentine and Serpentinite (Site not responding. Last check: 2007-10-09)
		Serpentinite is considered greenschist, a metamorphic facies associated with low temperature, low pressure conditions relative to other grades of metamorphic rocks.
		Higher pressure metamorphic grades of serpentinite contain glaucophane (a pale bluish-gray to fl serpentine mineral that occurs in fibrous to felted aggregate masses).
		Serpentinite soil tends to have low levels in all major plant nutrients (particularly calcium), and tend to be rich in magnesium, chromium and nickel - elements that are probably toxic to many plants.
	vulcan.wr.usgs.gov /LivingWith/VolcanicPast/Notes/serpentine.html (275 words)

	Serpentinite - Wikipedia, the free encyclopedia
		Serpentinitization of a mass of peridotite usually destroys all previous textural evidence because the serpentine minerals are weak and behave in a very ductile fashion.
		However, some masses of serpentinite are less severely deformed, as evidenced by the apparent preservation of textures inherited from the peridotite, and the serpentinites may have behaved in a rigid fashion.
		Serpentinite has been proposed as an efficient reagent for carbon sequestration using the magnesite reaction, above, or a variation where serpentine is reacted with carbon dioxde and hydrogen to form magnesite, magnetite, silica.
	en.wikipedia.org /wiki/Serpentinite (820 words)

	Ecological and floristic analyses of vascular plants along a gradient on disturbed serpentinite on opposing slopes in ... (Site not responding. Last check: 2007-10-09)
		Vegetation on the serpentinite barrens of North Carolina to Pennsylvania is most notable for plants that are at the extremes of, or disjunct from, their normal climatic ranges.
		Their survival on serpentinite has been attributed to lack of competition from local flora (Brooks 1987), but there are other factors that are probably affecting the serpentine vegetation composition.
		Serpentinite barrens are visible on both sides of the Staten Island Expressway where bedrock was exposed when new roads were cut during the mid-1960s.
	www.findarticles.com /p/articles/mi_qa4017/is_200401/ai_n9404451 (1253 words)

	Serpentinite - Presidio of San Francisco
		This serpentinite at the Presidio is probably made from rock scraped off the bottom of ocean crust that is found east of the subduction zone.
		Serpentinite rock is mostly composed of a mineral called serpentine.
		Because serpentinite outcrops form small isolated areas of unusual soil chemistry, endemic plants adapted to these chemical conditions, and the microclimates of a particular outcrop, often evolve there.
	www.nps.gov /prsf/geology/serpent.htm (265 words)

	serpentinite (Site not responding. Last check: 2007-10-09)
		Serpentinite is compose of the mineral serpentine which forms as the igneous minerals olivine and pyroxene are subjected to rising temperature and pressure conditions along a subduction plate boundary.
		Serpentinite can be cut and polished for use as ornamental stone inside buildings.
		The glossy, glazed luster and green-fl color are characteristic of serpentinite.
	seis.natsci.csulb.edu /bperry/metarock/SERPENTINITE.htm (92 words)

	Mount Diablo Interpretive Association - Geologic Guide To Falls Trail Loop
		Serpentinite is a metamorphic rock, created by the hydrothermal alteration by seawater of peridotite, the rock which comprises the mantle of the earth.
		The mantle is the layer of the earth's interior that lies between the relatively thin crust and the earth's core.
		Serpentinite is an ultramafic rock, rich in the elements iron and magnesium.
	www.mdia.org /mdiageofalls.htm (1350 words)

	serpentinite
		Associated with subduction zones, serpentinite is a metamorphic rock that is formed from the action of high pressure and heat upon schists or igneous rocks composed chiefly of mafic minerals, such as peridotite, gabbro, or basalt.
		For instance, the Coast Ranges in California, where serpentinite is the official state rock, primarily consist of slices of the ocean’s crust that have been faulted and folded along the coastline.
		Due to its derivation from the Earth’s mantle, protrusions of serpentinite are often quite different from the environment that surrounds them.
	www.geocities.com /serponmars/serpentinite.html?1118184412343 (199 words)

	Franciscan Serpentine, TSAW Project (Site not responding. Last check: 2007-10-09)
		It is thought that stray masses of serpentinite may have squeezed through the compacting mass of Franciscan sediment penetrating wherever they found a way.
		Not surprisingly, the serpentinite soils of the upper slopes of Ring Mountain (locally called the "Henneke" soils) are bare and thin between rocky outcroppings of rock.
		As a final challenge to plants trying to live here, serpentinite is almost devoid of potassium, sodium, calcium and phosphorus, all important fertilizers, AND it is unusually rich in magnesium, chromium and cobalt, heavy metals which are toxic to most plants.
	www.marin.cc.ca.us /~jim/ring/rserp.html (359 words)

	Governor's Office of Planning and Research - Addressing Naturally Occurring Asbestos in CEQA Documents (Site not responding. Last check: 2007-10-09)
		Serpentinite and/or ultramafic rock are known to be present in 44 of California's 58 counties.
		A map of ultramafic and serpentinite rock areas of the state that may contain NOA can be accessed at http://www.consrv.ca.gov/dmg/minerals/ultramafic/index.htm.
		Under current regulations, serpentinite and asbestos-bearing ultramafic rock materials used for surfacing applications subjected to vehicular, pedestrian, or non-pedestrian use, such as cycling and horse-back riding, may not contain more than 5% asbestos under the Asbestos Airborne Toxic Control Measure (ATCM) adopted by the CARB in 1990.
	www.opr.ca.gov /clearinghouse/asbestos.html (1363 words)

	Identification of Common Rocks - Serpentinite (Site not responding. Last check: 2007-10-09)
		Serpentinite is an oily looking green to fl fine-grained rock that can be scratched easily with a knife.
		In many places serpentinite is highly sheared and breaks into scaly fragments with smooth shiny faces and a slippery feel.
		Soapstone, however, is usually light green to grey in colour and soft enough to be scratched with the fingernail.
	www.dslextreme.com /users/bradleygames/rocks/serpent.htm (89 words)

	SERPENTINITE MUD GEOCHEMISTRY
		Chemical interaction between the serpentinite muds and seawater was a major concern for several key elements in this study (e.g., Na, B, Sr, and K).
		The analyzed serpentinite muds (total of 14 samples) were recovered from Leg 195 Holes 1200A, 1200D, and 1200E.
		Chondrite-normalized plots of REE for the serpentinite muds (Fig.
	www-odp.tamu.edu /publications/195_SR/103/103_6.htm (813 words)

	Geology of Thompson Area (Site not responding. Last check: 2007-10-09)
		The nickel deposits are of 2 types: low-grade deposits that occur within serpentinite bodies and at least one higher-grade deposit that occurs mainly in sedimentary rocks and gneisses.
		The high-grade Thompson deposit is associated with a small serpentinite intrusion and part of the ore occurs in this rock, however the majority of the sulphides occur in the adjacent sediments and schists.
		The relationship between the sulphides and pegmatites indicate that the sulphides replace the pegmatite which in turn is intrusive into both the biotite schist and serpentinite; this places the time of formation or, at least, the concentration, of the sulphides after the crystallization of the serpentinite.
	www.digistar.mb.ca /minsci/areas/tgeol.htm (478 words)

	Glacial Erratics and Serpentinite (Site not responding. Last check: 2007-10-09)
		A metamorphic rock, serpentinite is an odd greenish color, and if you have ever driven along the Staten Island Expressway toward the Verrazano Narrows Bridge, you have probably noticed the exposed serpentinite cliffs near Exit 13.
		Originally a part of the floor of the ocean, serpentinite was pushed upwards by continental shifts and collisions.
		Serpentinite's color comes from the combination of the rare green mineral lizardite and white asbestos.
	www.library.csi.cuny.edu /dept/history/lavender/glacialerratics.html (466 words)

	Serpentine Group (Mg6Si4O10(OH)8)
		The main objective was to document the mode of formation of the Round Mountain serpentinite mélange and the origin of its blocks.
		The authors came to the conclusion that the serpentinite mélange formed when a back arc that was west of the Smartville island arc (which were involved in the Sierra Nevada orogeny) subducted under the continent and then was risen up by tectonic processes.
		The inclusions still show characteristic of the subduction fluid released during serpentinite dehydration despite the loss of hydrogen and major elemental changes in the sample.
	www.und.edu /instruct/mineral/geol318/webpage/brandvik (2242 words)

	Emplacement and Growth of Serpentinite Seamounts on the Mariana Forearc (Site not responding. Last check: 2007-10-09)
		Seamounts comprised primarily of serpentinite muds are found on the outer forearc of the Izu-Bonin-Mariana subduction system.
		Serpentinite seamounts have been described as mud diapirs, mud volcanoes, uplifted blocks of mantle material, and a composite of the latter two.
		A strong reflection at the summit of Big Blue, the largest serpentinite seamount in the Mariana Forearc, represents a collapse structure that has been partially in-filled by younger muds, supporting the idea that serpentinite seamount growth is episodic.
	zephyr.rice.edu /AGU/mariana_forearc.html (351 words)

	(GCP3FM) Serpentinite Commons Earthcache by magicsteve (Site not responding. Last check: 2007-10-09)
		The magnetite occurs as small but sharp 8-sided fl crystals or octahedrons, which are attracted to a magnet when freed from their host rock, while the chromite occurs similarly but is not as magnetic.
		The serpentinite also has low chromium content from remnant chromite grains, which many plants cannot tolerate; thus plants and shrubs become stunted in their growth.
		Once the serpentinite bedrock was uncovered, construction and excavation costs became problematic and the project was abandoned.
	www.geocaching.com /seek/cache_details.aspx?wp=gcp3fm (1394 words)

	Golden Triangle Resources - From Serpentinite to Magnesium (Site not responding. Last check: 2007-10-09)
		Serpentinite tailings are currently under investigation for magnesium production in North America, the CIS and Australia.
		Serpentinite has the second highest content of magnesium of all the naturally occurring forms of magnesium with 26.3% Mg in its purest form.
		The resources located at the Woodsreef chrysotile asbestos mine consist of 24 million tonnes of serpentinite tailings, resulting from the extraction of chrysotile asbestos fibre, and 75 million tonnes of waste rock that has been visually estimated to contain approximately 60% serpentinite.
	www.pacificmagnesium.com /Magnes.htm (1632 words)

	IngentaConnect Jade (Nephrite and Jadeitite) and Serpentinite: Metasomatic Conne... (Site not responding. Last check: 2007-10-09)
		IngentaConnect Jade (Nephrite and Jadeitite) and Serpentinite: Metasomatic Conne...
		Amphibole jade is nephrite, a tremolite-actinolite rock with a felted, microcrystalline habit; pyroxene jade is jadeite rock (jadeitite), which varies from micro- to macrocrystalline textures.
		However, these serpentinites are associated with HP/LT metamorphic terranes, in which jadeitite occurs as isolated tabular bodies or tectonized blocks.
	www.ingentaconnect.com /content/bell/igr/2005/00000047/00000002/art00001 (332 words)

	Geology and Mineral Resources
		She mapped the Belvidere Mountain Complex which includes, from top to base, serpentinized ultramafic, coarse-grained amphibolite and garnet amphibolite, fine- grained amphibolite, greenstone, and muscovite schist (muscovite schist with small to large rounded blocks of amphibolites and greenstones).
		The mafic rocks define a tectonic stratigraphy underplated at the base of the serpentinite and emplaced onto the albite gneiss of the Hazens Notch Formation.
		The contact of the greenstone with the coarse grained and fine grained amphibolites, the serpentinite, and the pelitic schist/muscovite schist are fault contacts marked by fault slivers and thin talc zones.
	www.anr.state.vt.us /dec/geo/bmtn.htm (1279 words)

	Serpentine - Wikipedia, the free encyclopedia (via CobWeb/3.1 planetlab2.cs.umd.edu) (Site not responding. Last check: 2007-10-09)
		The lapis atracius of the Romans, now known as verde antique or verde antico, is a serpentinite breccia popular as a decorative facing stone.
		Serpentinite marbles are also widely used: Green Connemara marble (or Irish green marble) from Connemara, Ireland (and many other sources), and red Rosso di Levanto marble from Italy.
		Use is limited to indoor settings as serpentinites do not weather well.
	en.wikipedia.org.cob-web.org:8888 /wiki/Serpentine (1141 words)

	Serpentinite (Site not responding. Last check: 2007-10-09)
		Once one becomes familiar with the rock it is distinctive and easy to recognize, but it is the "feel" of it that is most indicative.
		Serpentine forms from the alteration of ultramafic igneous rocks under low grade metamorphic conditions in the presence of lots of water so any circumstances that provide these conditions will result in serpentinite.
		Aside from these conditions there is no specific tectonic association associated with serpentinite.
	csmres.jmu.edu /geollab/Fichter/MetaRx/Rocks/serpentinite1.html (134 words)

	The Geology of Staten Island
		Situated between the Newark Basin to the west, and the coastal plain to the east, is the Staten Island Serpentinite, which underlies the "highlands" of Staten Island.
		During the early stages of this mountain building event, a piece of ocean crust from the proto-atlantic ocean broke off and became incorporated into the collision zone.
		This unit is lower paleozoic (approximately 430 million years old) in age, and consists predominately of the serpentine minerals, antigorite, chrysotile, and lizardite.
	www.library.csi.cuny.edu /dept/as/geo/sigeo.htm (961 words)

	SOEST Press Releases
		Shallow earthquake activity in the Mariana forearc is largely confined to the outer 100-km zone of faulting and serpentinite seamount formation.
		The wide-spread distribution and reworking of debris shed from the mud volcano edifices and from fault-exposed serpentinite provides a model for the formation of complex serpentinite melange deposits in exotic terranes, such as the Franciscan of California.
		The inner slope of the trench north of the trench axis (white line in bottom figure) is covered in debris that has tumbled down the southern edge of the overriding plate.
	www.soest.hawaii.edu /SOEST_News/AGU2003/pfryer.htm (548 words)

	H2-rich fluids from serpentinization: Geochemical and biotic implications -- Sleep et al. 101 (35): 12818 -- ...
		The use of Ni, a common element in serpentinites and a
		and brucite on the mineral compositions of geologic serpentinites
		The path A–F represents venting of fluid in a deep system on land that is initially in equilibrium with serpentinite at point A. The second path (R–S–A–B–C–R) represents circulation beneath a massive H
	www.pnas.org /cgi/content/full/101/35/12818 (3760 words)

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