Slaty cleavage
Slaty Slat"y, a. [From {Slate}.] Resembling slate; having the nature, appearance, or properties, of slate; composed of thin parallel plates, capable of being separated by splitting; as, a slaty color or texture. [1913 Webster]

{Slaty cleavage} (Min.), cleavage, as of rocks, into thin leaves or plates, like those of slate; -- applied especially to those cases in which the planes of cleavage are not parallel to the planes of stratification. It is now believed to be caused by the compression which the strata have undergone.

{Slaty gneiss} (Min.), a variety of gneiss in which the scales of mica or crystals of hornblende, which are usually minute, form thin lamin[ae], rendering the rock easily cleavable. [1913 Webster]


The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

  • slaty cleavage — noun (geology) Fissility like that of slate along planes independent of bedding • • • Main Entry: ↑slate …   Useful english dictionary

  • Slaty — Slat y, a. [From {Slate}.] Resembling slate; having the nature, appearance, or properties, of slate; composed of thin parallel plates, capable of being separated by splitting; as, a slaty color or texture. [1913 Webster] {Slaty cleavage} (Min.),… …   The Collaborative International Dictionary of English

  • Slaty gneiss — Slaty Slat y, a. [From {Slate}.] Resembling slate; having the nature, appearance, or properties, of slate; composed of thin parallel plates, capable of being separated by splitting; as, a slaty color or texture. [1913 Webster] {Slaty cleavage}… …   The Collaborative International Dictionary of English

  • Cleavage (geology) — This article is about rock cleavage, for cleavage in minerals see Cleavage (crystal) Different ways in which a cleavage can develop in a sedimentary rock. A: original sedimentary rock; B: pencil cleavage; C: diagenetic foliation (parallel to… …   Wikipedia

  • flow cleavage — noun : cleavage that results from flow in hard rock and that is characterized by more or less slaty structure and reorientation or recrystallization of certain included minerals into a platy form * * * Petrol. cleavage resulting from the parallel …   Useful english dictionary

  • phyllite — phyllitic /fi lit ik/, adj. /fil uyt/, n. a slaty rock, the cleavage planes of which have a luster imparted by minute scales of mica. [1820 30; PHYLL + ITE1] * * * Fine grained metamorphic rock formed by the recrystallization of fine grained,… …   Universalium

  • metamorphic rock — Any of a class of rocks that result from the alteration of preexisting rocks in response to changing geological conditions, including variations in temperature, pressure, and mechanical stress. The preexisting rocks may be igneous, sedimentary,… …   Universalium

  • Metamorphic rock — Metamorphic redirects here. For other uses, see Metamorphic (disambiguation). Quartzite, a form of metamorphic rock, from the Museum of Geology at University of Tartu collection. Metamorphic rock is the transformation of an existing rock type,… …   Wikipedia

  • List of rock textures — This page is intended to be a list of rock textural and morphological terms. A * Adcumulate * Agglomeritic * Adamantine a type of lustre * Amygdaloidal * Anhedral * Antitaxial veins * Aphanitic * Aplitic; aplite * Augen textured gneiss *… …   Wikipedia

  • Queen's Medal — Die Royal Medal, auch The Queen s Medal genannt, ist eine von der Royal Society verliehene Auszeichnung für Wissenschaftler, die innerhalb des Commonwealth of Nations besonders wichtige Beiträge zur Weiterentwicklung der Wissenschaften geleistet… …   Deutsch Wikipedia

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