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Phyllite :: Phyllite (n.) Clay slate; argillaceous schist.

Micaceo-calcareous :: Micaceo-calcareous (a.) Partaking of the nature of, or consisting of, mica and lime; -- applied to a mica schist containing carbonate of lime..

Schist :: Schist (n.) Any crystalline rock having a foliated structure (see Foliation) and hence admitting of ready division into slabs or slates. The common kinds are mica schist, and hornblendic schist, consisting chiefly of quartz with mica or hornblende and often feldspar..

Shistose :: Shistose () See Shist, Schistose..

Flysch :: Flysch (n.) A name given to the series of sandstones and schists overlying the true nummulitic formation in the Alps, and included in the Eocene Tertiary..

Ampelite :: Ampelite (n.) An earth abounding in pyrites, used by the ancients to kill insects, etc., on vines; -- applied by Brongniart to a carbonaceous alum schist..

Ottrelite :: Ottrelite (n.) A micaceous mineral occurring in small scales. It is characteristic of certain crystalline schists.

Schistaceous :: Schistaceous (a.) Of a slate color.

Staurolitic :: Staurolite (n.) A mineral of a brown to black color occurring in prismatic crystals, often twinned so as to form groups resembling a cross. It is a silicate of aluminia and iron, and is generally found imbedded in mica schist. Called also granatite, and grenatite..

Alum Schist :: Alum schist () Alt. of Alum shal.

Schistose :: Schistose (a.) Alt. of Schistou.

Slate :: Slate (v. t.) An argillaceous rock which readily splits into thin plates; argillite; argillaceous schist.

Tetraschistic :: Tetraschistic (a.) Characterized by division into four parts.

Longmynd Rocks :: Longmynd rocks () The sparingly fossiliferous conglomerates, grits, schists, and states of Great Britain, which lie at the base of the Cambrian system; -- so called, because typically developed in the Longmynd Hills, Shropshire..

Paragonite :: Paragonite (n.) A kind of mica related to muscovite, but containing soda instead of potash. It is characteristic of the paragonite schist of the Alps..

Schistic :: Schistic (a.) Schistose.

Foliated :: Foliated (a.) Laminated, but restricted to the variety of laminated structure found in crystalline schist, as mica schist, etc.; schistose..

Granite :: Granite (n.) A crystalline, granular rock, consisting of quartz, feldspar, and mica, and usually of a whitish, grayish, or flesh-red color. It differs from gneiss in not having the mica in planes, and therefore in being destitute of a schistose structure..

Schistous :: Schistous (a.) Of or pertaining to schist; having the structure of a schist.

Argillite :: Argillite (n.) Argillaceous schist or slate; clay slate. Its colors is bluish or blackish gray, sometimes greenish gray, brownish red, etc..

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