scoria: see pumice pumice , volcanic glass formed by the solidification of lava that is permeated with gas bubbles. Usually found at the surface of a lava flow, it is colorless or light gray and has the general appearance of a rock froth.
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scoria

Heavy, dark, glassy igneous rock that contains many 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 lavas. Other scoria, sometimes called volcanic cinder, resembles clinkers, or cinders from a coal furnace.

scoria

1. a rough cindery crust on top of solidified lava flows containing numerous vesicles

2. refuse obtained from smelted ore; slag

scoria [′skȯr·ē·ə]

(geology)

Vesicular, cindery, dark lava formed by the escape and expansion of gases in basaltic or andesitic magma; generally denser and darker than pumice.

(materials)

Refuse after melting metals or reducing ore.

scoria

1. A dark, cellular volcanic rock.

2. Blast-furnace slag or scum.

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No references found	how planted upon this once scraggy scoria of a country? Moby Dick I-LXVII by Melville, Herman View in context Some of the interior valleys are strewed with scoria and broken stones, evidently of volcanic origin; the surrounding rocks bear the like character, and vestiges of extinguished craters are to be seen on the elevated heights. Astoria or Anecdotes of an enterprise beyond the Rocky Mountains by Irving, Washington View in context The path coiled down abruptly into a narrow ravine between two tumbled and knotty masses of blackish scoria. The Island of Doctor Moreau by Wells, H.G. View in context	Scopeumatidae Scopidae Scopolamine Scopolia scopoline scopometer scopophilia scopula scopulite Scopus Scopus, Mount scorbutic scorch time Scorched Area scorched finish scorching Scordatura Score scored block scored finish scored joint Scorel, Jan van Scoresby Scoresby Sound Scoresby, William scoria scoria cone scoria mound scoria tuff scorification scoring scoring test Scorodite Scorpaena Scorpaenidae Scorpaeniformes Scorpio Scorpio X-1 scorpioid cyme scorpion scorpion fish Scorpion, The scorpionfish Scorpionida Scorpius Scorsese Scorsese, Martin scorzalite Scorzonera Scot Scot, Michael	scores off scores off scores off scores off scores off Scores on the Doors scores out scores out scores out scores out scores out scores points scores points scores points scores points scores points scores through scores through scores through scores through scores through Scoresby Scoresby Sound Scoresby Sound Scoresby Sund Scoresby Sund Scoresby, Victoria Scoresby, William scoresheet scoresheets scoria Scoria cone Scoria cone Scoria cones Scoria cones scoria mound scoria tuff Scoriac scoriaceous scoriaceous scoriae scoriae Scorie Scorie SCORIF scorification scorification scorification scorified scorified scorifier scorifier scorifies scorifies Scoriform scorify scorify scorify scorifying scorifying SCORIM

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how planted upon this once scraggy scoria of a country?

Moby Dick I-LXVII by Melville, Herman View in context

Some of the interior valleys are strewed with scoria and broken stones, evidently of volcanic origin; the surrounding rocks bear the like character, and vestiges of extinguished craters are to be seen on the elevated heights.

Astoria or Anecdotes of an enterprise beyond the Rocky Mountains by Irving, Washington View in context

The path coiled down abruptly into a narrow ravine between two tumbled and knotty masses of blackish scoria.

The Island of Doctor Moreau by Wells, H.G. View in context

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scoria

scoria