Scoria

Scoria is a highly vesicular, dark colored volcanic rock that may or may not contain crystals (phenocrysts). It is typically dark in color (generally dark brown, black or purplish red), and basaltic or andesitic in composition. Scoria is relatively low in mass as a result of its numerous macroscopic ellipsoidal vesicles, but in contrast to pumice,...
Found on http://en.wikipedia.org/wiki/Scoria

Scoria

• (n.) Cellular slaggy lava; volcanic cinders. • (n.) The recrement of metals in fusion, or the slag rejected after the reduction of metallic ores; dross.
Found on http://thinkexist.com/dictionary/meaning/scoria/

scoria

(Gk: skor=dung; skoria refuse) slag-like fragments of pyroclastic material that have been ejected from a volcano in liquid form. Piles of scoria can form cones or mounds (Rangitoto Island).
Found on http://www.seafriends.org.nz/books/glossary.htm

Scoria

Sco'ri·a noun ; plural Scoriæ . [ Latin , from Greek ..., from ... dung, ordure.] 1. The recrement of metals in fusion, or the slag rejected after the reduction of metallic ores; dross. 2. Cellular slaggy lava; volcanic cinders.
Found on http://www.encyclo.co.uk/webster/S/35

Scoria

A bomb-size (> 64 mm) pyroclast that is irregular in form and generally very vesicular. It is usually heavier, darker, and more crystalline than pumice.
Found on http://midju.tripod.com/glossary.html

Scoria

A bomb-size (> 64 mm) pyroclast that is irregular in form and generally very vesicular. It is usually heavier, darker, and more crystalline than pumice.
Found on http://volcano.oregonstate.edu/glossary/1

Scoria

A bomb-size (> 64 mm) pyroclast that is irregular in form and generally very vesicular. It is usually heavier, darker, and more crystalline than pumice.
Found on http://www.encyclo.co.uk/local/21455

scoria

a bubbly and glassy lava rock high in iron content
Found on http://www.pbs.org/wgbh/nova/volcano/glossary.html

Scoria

A frothy basaltic rock, full of small gas bubbles. Often a black or red colour.
Found on http://www.geonet.org.nz/volcano/glossary.html

Scoria

A scoria is a cavity in igneous rock, caused by an escape of gas or steam. When such a cavity contains a mineral it is known as a amygdule.
Found on http://www.probertencyclopaedia.com/browse/HS.HTM

Scoria

An igneous rock containing abundant vesicles.
Found on http://www.evcforum.net/WebPages/Glossary_Geology.html

Scoria

Congealed lava, usually of mafic composition, with a large number of vesicles formed by gases coming
Found on http://www.encyclo.co.uk/local/22392

scoria

Congealed lava, usually of mafic composition, with a large number of vesicles formed by gases coming out of solution.
Found on http://www.scientificpsychic.com/etc/geology-glossary.html

scoria

dross or slag from metal-smelting; slag-like mass of lava
Found on http://phrontistery.info/s.html

scoria

heavy, dark-coloured, glassy, pyroclastic igneous rock that contains many vesicles (bubblelike cavities). Foamlike scoria, in which the bubbles are ... [1 related articles]
Found on http://www.britannica.com/eb/a-z/s/48

Scoria

Irregular masses of lava resembling clinker of slag; may be cellular (vesticular), dark-colored and heavy.
Found on http://www.contractorschoolonline.com/Masonry-Glossary.aspx

Scoria

Irregular masses of lava resembling clinker or slag; may be cellular (vesicular) dark-colored and heavy.
Found on http://www.selectstone.com/architectural-resources/stone-glossary/

scoria

Scoria exposed in the cross section of a cinder or scoria cone. Credit: J. Lowenstern / U.S. Geological Survey A vesicular (bubbly) glassy lava rock of basaltic to andesitic composition ejected from a vent during explosive eruption. The bubbly nature of scoria is due to the escape of volcanic g...
Found on http://www.daviddarling.info/encyclopedia/S/scoria.html

scoria

scoria: see pumice.
Found on http://www.infoplease.com/ce6/sci/A0918502.html
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