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Topic: Scoria

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Gabbro

Coquina

Igneous rock

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Andesite

Tephra

Basalt

Pyroclastic flow

Breccia

History of Oceania

Marble

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Pig iron

	USGS Photo Glossary: Scoria
		Scoria exposed in the cross section of a cinder or scoria cone.
		Scoria is a vesicular (bubbly) glassy lava rock of basaltic to andesitic composition ejected from a vent during explosive eruption.
		Originally, scoria was the name for the silicate slag left over from the smelting of ore. The word scoria, in fact, stems from the Greek word for refuse or trash.
	volcanoes.usgs.gov /Products/Pglossary/scoria.html (203 words)

	Scoria - Wikipedia, the free encyclopedia
		Scoria is the vesicular ejecta of mafic to intermediate magmas such as basalt and andesite.
		Scoria is generally thought of as the mafic version of pumice.
		Scoria is actually a kind of glass and not a mixture of minerals.
	en.wikipedia.org /wiki/Scoria (320 words)

	Vic Camp - scoria cones
		Scoria cones, also known as cinder cones, are the most common type of volcano.
		Unlike the other two main volcano types, scoria cones have straight sides and very large summit craters, with respect to their relatively small edifices.
		They are often symmetric, although many are asymmetric due to (1) the build up of tephra on the downwind flank of the edifice, (2) elongation of the volcano above an eruptive fissure, or (3) partial rafting of an outer wall of the volcano due to basalt lava oozing outward from beneath the volcano edifice.
	www.geology.sdsu.edu /how_volcanoes_work/scoriacone_page.html (295 words)

	Open Adit™ - Volcanoes
		Scoria cones are composed almost wholly of ejected basaltic tephra.
		Scoria cones are generated by Strombolian eruptions, which produce eruptive columns of basalt tephra generally only a few hundred meters high.
		Many inactive scoria cones, on the other hand, may be viewed as extinct shortly after they erupt, because such volcanoes are typically monogenetic and only erupt once.
	www.open-adit.com /geology/volcano.php (1580 words)

	volcano
		In Iceland a rim of scoria round the crater is charactenstic.
		Scoria cones are frequently produced as the last phase of an eruption on the site of larger volcanoes of other type.
		Scoria cones are built around the top of the volcano and pyroclastic flow and fall deposits may have a wide distribution on the flanks.
	earthsci.org /processes/geopro/volc/volc.html (8257 words)

	Volcanic scoria. Photos and brief explanation
		Scoria, the less silica-rich equivalent of pumice, are vesicular (bubbly) glassy volcanic rock fragments of basaltic to andesitic composition that are ejected during explosive eruptions.
		Scoria is the common product of strombolian eruptions or lava fountains.
		Scoria is typically dark gray to fl in color, mostly due to its high iron content.
	www.decadevolcano.net /photos/keywords/scoria.htm (122 words)

	Neighborhood Rocks: Scoria Basalt
		Scoria is full of holes, and the holes are often uniform in size and shape.
		Scoria is an igneous rock, because it formed from melted rock.
		Scoria is an extrusive igneous rock, because it formed from lava "extruded" onto the surface of the Earth.
	saltthesandbox.org /rocks/scoriabasalt.htm (483 words)

	CVO Website - Ashfall, Tephra, Pumice, Scoria, etc.
		Pumice and scoria clasts record eruption of new magma; that is, they represent rock material that was molten when erupted and that expanded into a froth before solidifying.
		The terms "pumice" and "scoria" are used both for highly vesicular particles and for some particles that are only moderately vesicular and have specific gravities greater than 1.
		Scoria forms when blobs of gas-charged lava are thrown into the air during an eruption and cool in flight, falling as dark volcanic rock containing cavities created by trapped gas bubbles.
	vulcan.wr.usgs.gov /Glossary/Tephra/description_tephra.html (1994 words)

	Untitled
		Scoria has cooled too quickly for minerals to form; i.e.
		It is not possible to tell the composition from external appearance alone and so we just spread all scoria across the intermediate to mafic range.
		Scoria is associated with intermediate and mafic volcanic processes in terrestrial environments, commonly appearing with vesicular basalts in cinder cones and lava flows.
	csmres.jmu.edu /geollab/Fichter/IgnRx/Scoria-1A1.html (166 words)

	Volcanism Studies Related to the Probabilistic Volcanic Hazard at Yucca Mountain for the Period 1986-1996
		Except for a well-developed lava lake at its summit and numerous rootless lava flows, the cone is composed of pyroclasts of scoria, agglutinated scoria, ash, and bombs.
		A feeder dike within the Southeast zone is exposed in the interior of a scoria mound cut by a wash. The dike is 3 m wide and strikes N36E and dips 81 degrees to the south.
		A degraded scoria mound at the intersection of the southernmost northeast-striking fissure and the northwest trend may have been the source for many of the flows that lie southeast of Red Cone.
	www.state.nv.us /nucwaste/yucca/volcan01.htm (8178 words)

	Pumice Rock New Zealand, Scoria Quarry New Zealand : About Scoria
		A scoria cone is a small, steep sided cone, usually with a deep central crater.
		Scoria is formed when magma rich in dissolved gases is erupted at the earth's surface.
		Taupo Scoria work alongside District and Regional councils and engage independent experts to determine the best methods of extracting and processing the scoria, and work with many expert consultants to ensure all aspects of the quarrying operation meet regulations and care for the surrounding environment.
	www.tauposcoria.co.nz /aboutus.htm (622 words)

	Ascension Island Geology
		In excess of 50 scoria cones dot the surface of Ascension.
		The scoria cones typically are asymmetric in shape, having over-steepened southeastern flanks and shallowly dipping northwestern flanks due to the southeast trade winds (which blow constantly across the island) concentrating the scoria down-wind.
		Most of Green Mountain is composed of pyroclastic deposits, both scoria and pumice, and many of the lava flows in the western part of the island have a thin pyroclastic veneer.
	ags.ou.edu /~bweaver/Ascension/ai-geol.htm (1801 words)

	Crater Lake NP: Pumice, Scoria, and Other Terms
		Scoria is similar to pumice but has a chemical composition at the basaltic end of the scale.
		Both pumice and scoria are pyroclastic ejecta (that hot, welded stuff again) that result when gases are released in solution.
		Both pumice and scoria are usually glassy but commonly contain crystals of minerals that were formed earlier.
	www.nps.gov /crla/pumice.htm (569 words)

	GO 326 Eifel volcanism
		The volcanic deposits are dominated by potassium-rich, silica-poor scoria cones, which are typical for intraplate, continental settings (van den Bogaard 1995).
		Flank of scoria cone in which clay dikes (red) can be seen.
		The Eifel volcanic region is closely associated with the Rhine Graben, a continental rift zone of Cenozoic age--see handout maps.
	academic.emporia.edu /aberjame/tectonic/eifel/eifel.htm (882 words)

	Scoria
		Scoria is a light-weight, dark-colored, glassy, pyroclastic igneous rock that contains many vesicles (bubblelike cavities).
		Foamlike scoria, in which the bubbles are very thin shells of solidified basaltic magma, occurs as a product of explosive eruptions (as on Hawaii) and as frothy crusts on some pahoehoe (smooth- or billowy-surfaced) lavas.
		US Highway 395 through the southern Owens Valley has been surfaces with scoria cinders from Red Hill, a small cinder cone adjacent to the highway.
	geology.csupomona.edu /alert/Igneous/scoria.htm (110 words)

	Scoria Rock New Zealand, Aggregate Supplier New Zealand : Taupo Scoria Quarry
		Scoria Rock New Zealand, Aggregate Supplier New Zealand : Taupo Scoria Quarry
		Taupo Scoria Quarry New Zealand are producers and suppliers of quality scoria rock based products (with basalt rock,
		Copyright © 2005 Taupo Scoria All rights reserved
	www.tauposcoria.co.nz (100 words)

	Particle Density of Volcanic Scoria Determined by Water Pycnometry
		Several classical textbooks define this concept as the density of the soil solid-matter, whereas most standard test methods define it as the density of a soil sample crushed and passed through a sieve with a 2-mm mesh (for agronomical purposes) or 4.75 mm (for civil engineering purposes).
		We hypothesize that both definitions are not equivalent for volcanic scoria, because these contain small vesicles apparently isolated from the atmosphere.
		To test this hypothesis, an experiment was performed with basaltic scoria (known as &emph type="2";tezontle&/emph; in Mexico) with sizes ranging from 2 to 4.75 mm.
	www.astm.org /JOURNALS/GEOTECH/PAGES/623.htm (311 words)

	Sunset Crater Volcano (Site not responding. Last check: 2007-11-06)
		About half of the scoria fell very near its source and built Sunset Crater cinder cone, about half blanketed the region with ash and other small volcanic particles.
		Eruption of fl lapilli and bombs result in minor collapse of the east rim of the crater and formation of the small crater on the east side of the summit.
		Eruption of rows of small red scoria cones on top of the fl scoria tephra blanket east-southeast of Sunset Crater was after or coincident the above.
	www2.nature.nps.gov /geology/usgsnps/sunset/sunvolc.html (349 words)

	Mt Scoria Conservation Park - EPA/QPWS
		Rising 150m above the cultivated plains, Mt Scoria is a striking local landmark protected in Mt Scoria National Park.
		Mt Scoria is part of the traditional lands of the Gangulu people.
		Mt Scoria is 6km south of Thangool near Biloela in central Queensland.
	www.epa.qld.gov.au /projects/park/index.cgi?parkid=61 (189 words)

	ROSE CULTURE IN SCORIA
		A high yield was obtained in the 200 ppm N treatment.
		No significant effect of scoria depth on flower yield or quality was detected.
		The results of this experiment were subsequently confirmed by observations in commercial greenhouses.
	www.actahort.org /books/99/99_15.htm (82 words)

	(GCGNKG) Scoria by Rogainer (Site not responding. Last check: 2007-11-06)
		Found by 8yr old grandson who was visiting on school holidays, who left a small sticker in the cache.
		Local paper has article on Scoria from QPWS, "It also determined that some of the basalt columns on the mountain had suffered extensive damage from people stricking them and that would eventually result in the destruction of the unique landmark.
		Due to the loose scree that covers much of the mountain, the QPWS ascertained there were significant risks associated with traversing the mountain.
	www.geocaching.com /seek/cache_details.aspx?wp=GCGNKG (653 words)

	Compositional variations within scoria cones -- Strong and Wolff 31 (2): 143 -- Geology
		Compositional variations within scoria cones -- Strong and Wolff 31 (2): 143 -- Geology
		Basaltic to andesitic monogenic scoria cones from the southern
		the scoria suggest that either magma chambers do not exist and
	geology.geoscienceworld.org /cgi/content/abstract/31/2/143 (212 words)

	Scoria - LoveToKnow 1911
		Read LoveToKnow 1911:Explanation to get more explanation and see how you can help!
		scoria, slag), in geology, a name applied to lava when moderately vesicular and having a structure like that of a clinker.
		Ejected masses of scoriaceous lava are often called "cinders," a term conveniently used for all lumps of vesicular lava (see Volcano).
	www.1911encyclopedia.org /Scoria (77 words)

	Rock & pebbles \| Crushed brick \| Volcanic scoria
		Rocks and pebbles are increasingly becoming the landscaping materials of choice due to water conservation considerations.
		We offer bulk supplies of red volcanic scoria, crushed brick and amazingly round stone balls, all in graded sizes.
		Distinctive rich red purple scoria for landscaping, pathways and drainage
	www.thelandscapeshop.com /RockPebbles/Rock_Pebbles_Top.htm (71 words)

	The Unofficial Scoria Biography
		WHO'S WHO - INDEXES - HISTORY OF THE DCU - MESSAGE BOARD - SEARCH ENGINE
		A demon of Hell and one of the Lilim, Scoria was a scientist who constructed several infernal automatons, manipulated reality with his clockworks, and even succeeded in tapping into the thoughts of God.
		Scoria allied himself with the Japanese storm-god Susano-o-no-Mikoto, but was ultimately killed by his Lilim "sibling", Mazikeen.
	www.dcuguide.com /who.php?name=scoria (156 words)

	SCORIA HEAD INDUSTRIAL MUSIC :: ART :: MULTIMEDIA
		SCORIA HEAD INDUSTRIAL MUSIC :: ART :: MULTIMEDIA
		:: SCORIA HEAD :: industrial music :: industrial multimedia art :: experimental noise band - multimedia service ::
		:: SORRY :: You do need FRAMES (turned on) in order to visit SCORIA HEAD !
	www.scoria-head.com (42 words)

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