schist

Definitions

  • WordNet 3.6
    • n schist any metamorphic rock that can be split into thin layers
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Webster's Revised Unabridged Dictionary
    • n Schist shĭst (Geol) 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.
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Century Dictionary and Cyclopedia
    • n schist A rock the constituent minerals of which have assumed a position in more or less closely parallel layers or folia, due not to deposition as a sediment, but—in large part, at least—to metamorphic action, which has caused a rearrangement or imperfect crystallization of the component minerals, or the formation of new ones, these. in the course of the process, having assumed the parallel arrangement characteristic of the rock. Schist and slate are not essentially different terms; but of late years the latter has been chiefly employed to designate a fine-grained argillaceous rock divided into thin layers by cleavage-planes, and familiar in its use for roofing; while the word schist is generally employed in composition with a word indicating the peculiar mineral species of which the rock is chiefly made up, and which by its more or less complete foliation gives rise to the schistose structure: thus, hornblende-schist, chlorite-schist, mica-schist, etc.—all included under the general designation of crystalline schists, among which argillaceous schist also belongs, and from which it is separated only because its fissility is, as a general rule, more perfect than that of the other schists, and because it is for this reason of much practical importance, especially in its application to roofing. Also spelled shist.
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Chambers's Twentieth Century Dictionary
    • n Schist shist a term properly applied to crystalline rocks with a foliated structure, as mica-schist, hornblende-schist, &c
    • Schist indurated clay-rocks with a fissile structure are sometimes erroneously described as schists
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Etymology

Webster's Revised Unabridged Dictionary
Gr. divided, divisible, fr. to divide: cf. F. schiste,. See Schism

Usage

In literature:

The sandstone of the plateau has at first been hardened, then quite metamorphosed into a chocolate-coloured schist.
"The Last Journals of David Livingstone, in Central Africa, from 1865 to His Death, Volume I (of 2), 1866-1868" by David Livingstone
In some parts clay schists appear, which look as if they had been fused or were baked by intense heat.
"The Last Journals of David Livingstone, in Central Africa, from 1865 to His Death, Volume II (of 2), 1869-1873" by David Livingstone
Granite and schist; feldspathic.
"History and Comprehensive Description of Loudoun County, Virginia" by James W. Head
The rocks known as gneiss and schist are readily bored and are considered fair water bearers.
"If You're Going to Live in the Country" by Thomas H. Ormsbee and Richmond Huntley
The rock on the Manhattan side was Hudson schist, while that in the reef was Fordham gneiss.
"Transactions of the American Society of Civil Engineers, vol. LXVIII, Sept. 1910" by James H. Brace, Francis Mason and S. H. Woodard
Rudely shaped chisel or celt of metamorphic schist.
"Illustrated Catalogue Of The Collections Obtained From The Indians Of New Mexico And Arizona In 1879" by James Stevenson
Schists and quartzites of Nandi.
"Encyclopaedia Britannica, 11th Edition, Volume 4, Part 3" by Various
For a long time past there have been used in schools slate tablets upon which the pupils write with a pencil made of soft gray schist.
"Scientific American Supplement, No. 1157, March 5, 1898" by Various
It is present in some sediments and likewise occurs in many schists and gneisses.
"The Economic Aspect of Geology" by C. K. Leith
Stretched upon the bare schist, commanding the back stretch, they munched slices of raw bacon.
"The Crimson Gardenia and Other Tales of Adventure" by Rex Beach
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In poetry:

“He stooped to tear a lump of schist
Out of the clinging soil,
By thunder, you should hear him jist,
And see the way he’d coil
Upon the ground, and hug his fist,
And scratch and dig and toil!
"The Sleeping Beauty" by Henry Lawson

In news:

Object #9: Manhattan Schist .
But is it art or a piece of schist .
Garnet Peak 's summit consists of layered chunks of schist, a type of metamorphic rock seen along much of the Laguna escarpment.
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In science:

Bulk matter searches used hundreds of kg of material, including meteorites, schists, ferromanganese nodules, iron ore and others. A superconducting coil through which the material was passed, yielded a monopole/nucleon ratio in the samples < 1.2 × 10−29 at 90% CL .
Magnetic Monopole Searches
MMs in bulk matter by passing through the superconducting magnet moon rocks, meteorites, schists and terrestrial magnetic materials .
Searches for Magnetic Monopoles and ... beyond
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