Discover Scoria
Scoria Technical Terms
Scoria: (a) [soils] Vesicular, rock fragments > 2 mm in at least one dimension and a specific gravity > 2.0, or a cindery crust of such material on the surface of andesitic or basaltic lava; the vesicular nature is due to the escape of volcanic gases before solidification; it is usually heavier, darker, and more crystalline than pumice. Compare - cinder, pumice, tephra; (b) [geology] The same as (a) except no size restrictions are applied. SW