stratification

Definitions

  • WordNet 3.6
    • n stratification the placing of seeds in damp sand or sawdust or peat moss in order to preserve them or promote germination
    • n stratification the act or process or arranging persons into classes or social strata
    • n stratification a layered configuration
    • n stratification forming or depositing in layers
    • n stratification the condition of being arranged in social strata or classes within a group
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Webster's Revised Unabridged Dictionary
    • Stratification The act or process of laying in strata, or the state of being laid in the form of strata, or layers.
    • Stratification (Physiol) The deposition of material in successive layers in the growth of a cell wall, thus giving rise to a stratified appearance.
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Century Dictionary and Cyclopedia
    • n stratification The act of stratifying, or the state of being stratified; formation or arrangement in layers.
    • n stratification Specifically, in geology, deposition in beds or strata: the mode of occurrence of those rocks which have been laid down or spread over the surface by water. The most important indication and result of stratification is that the rock separates more or less easily along the planes separating the beds or strata. Each stratification-plane marks a change in the character of the deposit, or a shorter or longer period during which deposition was suspended. Often one stratum is succeeded by another of quite different character, showing a change in the existing conditions. Sometimes, however, a rock is distinctly stratified, but each stratum separates easily into much thinner layers, closely resembling one another in petrographic character: this is generally called lamination. In some cases the apparent stratification seems to be of the nature of an imperfect cleavage, there having been a certain amount of rearrangement of the particles of the rock parallel to the planes of deposition. See cuts under Artesian and erosion.
    • n stratification In physiology, the thickening of a cell-wall by the deposition of successive thin layers of formed material; also, the arrangement of the layers so deposited.
    • n stratification In electricity, the appearance presented by an electric discharge, or a series of rapid discharges, in a rarefied gas, light and dark bands or striæ being produced.
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Chambers's Twentieth Century Dictionary
    • n Stratification act of stratifying: state of being stratified: process of being arranged in layers
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Etymology

Webster's Revised Unabridged Dictionary
Cf. F. stratification,
Chambers's Twentieth Century Dictionary
Fr. stratifier—L. stratum, facĕre, to make.

Usage

In literature:

Here on the north flank of the mountain are two thousand feet of stratifications.
"Wealth of the World's Waste Places and Oceania" by Jewett Castello Gilson
The cleavage of slates then is not a question of stratification; what then is its cause?
"Fragments of science, V. 1-2" by John Tyndall
The stratification was looser than usual, and several mighty masses had fallen from it into the river.
"Thurston of Orchard Valley" by Harold Bindloss
Where it was broken across, the floe showed a marked stratified formation, recalling the stratification of a glacier.
"Farthest North" by Fridtjof Nansen
The stratification is throughout undisturbed and practically horizontal.
"Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 2" by Various
It roused curious feelings as to the nature and value of stratification.
"The "Genius"" by Theodore Dreiser
Instead of wearing thin they wear thick, and in their stratification have no small geological significance.
"My First Summer in the Sierra" by John Muir
These, it will be seen, are horizontal, and lie in what is termed "unconformable stratification" on the more ancient series.
"Principles of Geology" by Charles Lyell
Up the entire height of the wall there was stratification, which was unusually marked.
"Farthest North" by Fridtjof Nansen
Structure and Stratification on the Furgge glacier 394 47.
"The Glaciers of the Alps" by John Tyndall
The stratification at Broughton is peculiar, and different from anything that is found either in Thetford or Coleraine.
"Asbestos" by Robert H. Jones
And throughout history this {157} stratification into castes continues.
"A Short History of the World" by H. G. Wells
It exhibits regular stratification, being always found in horizontal masses.
"Scenes and Adventures in the Semi-Alpine Region of the Ozark Mountains of Missouri and Arkansas" by Henry Rowe Schoolcraft
In spite of the difficulties, the original stratification can usually be determined where there are good exposures of the rock.
"The Geography of the Region about Devils Lake and the Dalles of the Wisconsin" by Rollin D. Salisbury
To the south they are of a different formation, with stratification much contorted.
"Journeys in Persia and Kurdistan, Volume II (of 2)" by Isabella L. Bird
While learned men were geologizing through the successive stratifications of humanity, a new claimant appeared.
"The Gentle Reader" by Samuel McChord Crothers
Circulating blood is therefore necessary for the stratification, and such thrombi are likely to be mixed in color.
"A System of Practical Medicine by American Authors, Vol. I" by Various
But as yet he would have formed a very inadequate notion of the stratification of the earth's crust.
"Omphalos" by Philip Henry Gosse
On the 27th of November the miners working east from the West Shaft struck a seam running across the stratification of the mountain.
"Report of the Hoosac Tunnel and Troy and Greenfield Railroad, by the Joint Standing Committee of 1866." by Tappan Wentworth
At this time the vitelline membrane appears frequently to exhibit a distinct stratification, dividing it into two or more successive layers.
"The Works of Francis Maitland Balfour, Volume 1" by Francis Maitland Balfour
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In news:

Prospective Multicenter PARCADIA Trial to Study Risk Stratification for ICD Interventions.
Risk Stratification Test For Early Stage Lung Cancer Launched.
Test Makes Early Risk Stratification Possible.
Horses may be the source of humans' oldest social stratifications.
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In science:

For any stratification {Aα} of A, let us define stratified ultradistributions along {Aα}.
Stratified Whitney jets and tempered ultradistributions on the subanalytic site
Let X = Rn and A ⊂ X a closed subanalytic set with a 1-regular stratification {Aα}.
Stratified Whitney jets and tempered ultradistributions on the subanalytic site
Take a 1-regular stratification {Aα} of A and fix it.
Stratified Whitney jets and tempered ultradistributions on the subanalytic site
The EO stratification and Sg for g = 3 We determine the relationship between the EO stratification and the supersingular locus Sg for g = 3.
On the reduction of the Siegel moduli space of abelian varieties of dimension 3 with Iwahori level structure
The KR stratification and the supersingular locus Let g = 3.
On the reduction of the Siegel moduli space of abelian varieties of dimension 3 with Iwahori level structure
Among the results of this section, mention the fact that the relation S ⊂ S ′ defines an order on the set of strata and that a stratifed map respects this order.
Rational Homotopy and Intersection Cohomology
When the Brunt–V¨ais¨al¨a frequency N is an integer and ξ has zero integral (at time zero), then the stratif ied f luid equation is a geodesic equation on a Lie group .
Geodesic Equations on Diffeomorphism Groups
Zuckerman, in A Theory of Age Stratification, M.W.
The effects of aging of scientists on their publication and citation patterns
Their citation rates will be higher than in the cumulative advantage model. There is thus more stratification in our model than in the cumulative advantage model. Consequently, the resulting citation distribution is far more skewed.
Theory of citing
New approaches to population stratification in genome-wide association studies.
An efficient group test for genetic markers that handles confounding
Principal components analysis corrects for stratification in genome-wide association studies.
An efficient group test for genetic markers that handles confounding
This own function poorly depends on the conditions of stratification and describes the superficial wave.
General problems of the internal gravity waves linear theory
Therefore at solution of the problem of propagation of the internal waves alongside with vertical stratification and 2N on the horizontal variables it is necessary to consider also the variability of dependence of the stratified medium parameters in a time.
Dynamics of the internal gravity waves in the heterogeneous and nonstationary stratified mediums
What is needed is, not the behavior of the transmitted wave in the unique direction calculated on the basis of strict horizontal stratification, but an average behavior for directions within a cone whose angle is controlled by the fluctuations in the angle of tilt of the stratification.
T.I.P.O. (Tesla Interferometric Planetary Observer)
We discuss a version of “Quillen stratification” theorem for the Singer transfer and its consequences.
Sub-Hopf algebras of the Steenrod algebra and the Singer transfer
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