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Auger :: Auger (n.) An instrument for boring or perforating soils or rocks, for determining the quality of soils, or the nature of the rocks or strata upon which they lie, and for obtaining water..

Miascite :: Miascite (n.) A granitoid rock containing feldspar, biotite, elaeolite, and sodalite..

Crystal :: Crystal (n.) The material of quartz, in crystallization transparent or nearly so, and either colorless or slightly tinged with gray, or the like; -- called also rock crystal. Ornamental vessels are made of it. Cf. Smoky quartz, Pebble; also Brazilian pebble, under Brazilian..

Serpentinous :: Serpentinous (a.) Relating to, or like, serpentine; as, a rock serpentinous in character..

Starling :: Starling (n.) A California fish; the rock trout.

Blast :: Blast (n.) The act of rending, or attempting to rend, heavy masses of rock, earth, etc., by the explosion of gunpowder, dynamite, etc.; also, the charge used for this purpose..

Irestone :: Irestone (n.) Any very hard rock.

Sedimentation :: Sedimentation (n.) The act of depositing a sediment; specifically (Geol.), the deposition of the material of which sedimentary rocks are formed..

Lavrock :: Lavrock (n.) Same as Laverock.

Clastic :: Clastic (a.) Fragmental; made up of brok/ fragments; as, sandstone is a clastic rock..

Phanerocrystalline :: Phanerocrystalline (a.) Distinctly crystalline; -- used of rocks. Opposed to cryptocrystalline.

Devonian :: Devonian (a.) Of or pertaining to Devon or Devonshire in England; as, the Devonian rocks, period, or system..

Quarry :: Quarry (n.) A place, cavern, or pit where stone is taken from the rock or ledge, or dug from the earth, for building or other purposes; a stone pit. See 5th Mine (a)..

Scaur :: Scaur (n.) A precipitous bank or rock; a scar.

Shelf :: Shelf (v. i.) A stratum lying in a very even manner; a flat, projecting layer of rock..

Lithophyse :: Lithophyse (n.) A spherulitic cavity often with concentric chambers, observed in some volcanic rocks, as in rhyolitic lavas. It is supposed to be produced by expanding gas, whence the name..

Archimedes :: Archimedes (n.) An extinct genus of Bryzoa characteristic of the subcarboniferous rocks. Its form is that of a screw.

Hippurite :: Hippurite (n.) A fossil bivalve mollusk of the genus Hippurites, of many species, having a conical, cup-shaped under valve, with a flattish upper valve or lid. Hippurites are found only in the Cretaceous rocks..

Cleft :: Cleft (n.) A space or opening made by splitting; a crack; a crevice; as, the cleft of a rock..

Rocking-chair :: Rocking-chair (n.) A chair mounted on rockers, in which one may rock..

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