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o ice or to its action; consisting of ice; frozen; icy; esp., pertaining to glaciers; as, glacial phenomena. Lyell.

One who attributes the phenomena of the drift, in geology, to glaciers.

Formed or occurring after the last glacial epoch of the Pleistocene period, or at a locality within the area of Pleistocene glaciation after the final disappearance of the glacier from the locality.

Prior to the glacial or drift period.

Pertaining or belonging to the under side of a glacier; being beneath a glacier; as, subglacial streams.

encies from its native bed. See Drift. Bowlder clay, the unstratified clay deposit of the Glacial or Drift epoch, often containing large numbers of bowlders. -- Bowlder wall, a wall constructed of large stones or bowlders.

A subdivision of the Quaternary age immediately following the Glacial period; -- so named from beds near Lake Champlain.

sand, gravel, stones, etc., caused by former action of flowing waters, or the melting of glacial ice.

t anchor. See Sea anchor, and also Drag sail, under Drag, n. -- Drift epoch (Geol.), the glacial epoch. -- Drift net, a kind of fishing net. -- Drift sail. Same as Drag sail. See under Drag, n.

A hill of compact, unstratified, glacial drift or till, usually elongate or oval, with the larger axis parallel to the former local glacial motion.

he albatrosses and petrels. Among the well- known species are the arctic fulmar (Fulmarus glacialis) (called also fulmar petrel, malduck, and mollemock), and the giant fulmar (Ossifraga gigantea).

To produce glacial effects upon, as in the scoring of rocks, transportation of loose material, etc. Glaciated rocks, rocks whose surfaces have been smoothed, furrowed, or striated, by the action of ice.

The process of glaciating, or the state of being glaciated; the production of glacial phenomena.

nsive fields which drift out to sea. -- Ground ice, anchor ice. -- Ice age (Geol.), the glacial epoch or period. See under Glacial. -- Ice anchor (Naut.), a grapnel for mooring a vessel to a field of ice. Kane. -- Ice blink Etym: [Dan. iisblink], a streak of whiteness of the horizon, caused by the reflection of lig…

id, and, by heating phosphoric acid, obtained as a crystalline substance, commonly called glacial phosphoric acid.

Any one of several species of large pelagic petrels and fulmars, as Fulmarus glacialis, of the North Atlantic, and several species of Æstrelata, of the Southern Ocean. See Fulmar. [Written also mollymawk, malmock, mollemock, mallemocke, etc.]

The arctic fulmar (Fulmarus glacialis). Sometimes also applied to other sea birds.

found in Sweden, etc., supposed by some to be of marine origin, but probably formed by subglacial waters. The osar are similar to the kames of Scotland and the eschars of Ireland. See Eschar.

Of, pertaining to, or derived from, a former glacial formation.

One of the great divisions of geological time; as, the Tertiary period; the Glacial period. See the Chart of Geology.