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A genus of extinct Merostomata, found in Silurian rocks. Some of the species are more than three feet long.

The scaling off of a bone, a rock, or a mineral, etc.; the state of being exfoliated.

. The expedition miserably failed. Prescott. Narrative of the exploring expedition to the Rocky Mountains. J. C. Fremont.

Forced out at the surface; as, extrusive rocks; -- contrasted with intrusive.

A stratum in crystalline rock, containing metallic sulphides. Raymond.

course; his farewell bow. Leans in his spear to take his farewell view. Tickell. Farewell rock (Mining), the Millstone grit; -- so called because no coal is found worth working below this stratum. It is used for hearths of furnaces, having power to resist intense heat. Ure.

To interrupt the continuity of (rock strata) by displacement along a plane of fracture; -- chiefly used in the p.p.; as, the coal beds are badly faulted.

A genus of fossil corals abundant in the Silurian and Devonian rocks, having polygonal cells with perforated walls.

A barren or rocky hill. T. Gray.

A finegrained rock, flintlike in fracture, consisting essentially of orthoclase feldspar with occasional grains of quartz.

A narrow inlet of the sea, penetrating between high banks or rocks, as on the coasts of Norway and Alaska. [Written also fjord.]

as, to fire a torpedo; to disharge; as, to fire a musket or cannon; to fire cannon balls, rockets, etc.

A fiery meteor; an ignis fatuus; a rocket.

o make, when kindled, a great variety of figures in fire, often variously colored. The skyrocket is a common form of firework. The name is also given to various combustible preparations used in war.

A narrow opening, made by the parting of any substance; a cleft; as, the fissure of a rock. Cerebral fissures (Anat.), the furrows or clefts by which the surface of the cerebrum is divided; esp., the furrows first formed by the infolding of the whole wall of the cerebrum. -- Fissure needle (Surg.), a spiral needle for…

A flat stone used in paving, or any rock which will split into such stones. See Flag, a stone.

Consisting of, composed of, abounding in, or resembling, flint; as, a flinty rock; flinty ground; a flinty heart. Flinty rockFlinty state, a siliceous slate; -- basanite is here included. See Basanite.

uid; as, the tide floated the ship into the harbor. Had floated that bell on the Inchcape rock. Southey.

ndering. -- Floating light, a light shown at the masthead of a vessel moored over sunken rocks, shoals, etc., to warn mariners of danger; a light- ship; also, a light erected on a buoy or floating stage. -- Floating liver. (Med.) See Wandering liver, under Wandering. -- Floating pier, a landing stage or pier which r…

The rock underlying a stratified or nearly horizontal deposit.