stratum

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stratum

1. any of the distinct layers into which sedimentary rocks are divided
2. Biology a single layer of tissue or cells
3. a layer of ocean or atmosphere either naturally or arbitrarily demarcated

stratum

see SOCIAL STRATUM.

Stratum

 

in geology, the principal form of occurrence of sedimentary rocks, reflecting their sequential deposition. A stratum has more or less homogeneous composition and is confined by two roughly parallel surfaces (the upper is the ceiling and the lower is the sole). The thickness of a stratum, from fractions of a meter to several meters, is much less than the length. Each stratum (with normal, undisturbed bedding) is younger than the one beneath it. Strata may also be composed of metamorphic rocks. Magmatic rocks and ores that are stratiform are called sheet deposits.


Stratum

 

a designation for social levels or classes found in certain non-Marxist conceptions of social stratification.

stratum

[′strad·əm]
(geology)
A mass of homogeneous or gradational sedimentary material, either consolidated rock or unconsolidated soil, occurring in a distinct layer and visually separable from other layers above and below.
(science and technology)
One in a sequence of distinct layers.
(statistics)

stratum

A bed of sedimentary rock or earth.
References in periodicals archive ?
Figure 7 shows the distribution of the modelled geological layers versus distribution polygons created using geological maps: (a) geological surface of the Caledonian sequence and (b) Hercynian sequence.
The volume changes (collapse or swelling) and the dynamic properties in the geological layers can cause damage to the structures; this situation makes imperative the introduction of the unsaturated soils mechanics in the design of the projects that will reduce the problems that the MASS is experimenting at the present.
XIII engineering geological layers (EGL) were determined in the research area and based on investigation data about CPT, DPSH of boreholes, excavations, soil as well as on laboratory investigations.
That information was graphically translated into the brickwork, a different brick was selected to represent the various geological layers.
If sufficient time had passed since our demise--and only a small fraction of 100 million years would be necessary--all our mighty edifices and sprawling cities would have been eroded or buried beneath new geological layers.
According to the law, CO2 stored in geological layers is defined as waste matter with a potential impact on underground water.
But now it forms a foundation to a succession of geological layers of style, laid down over 50 years and reflecting the experience of subsequent generations and their quest for a distinctive identity.
By analyzing the geological layers of past eruptions, the scientists have concluded that Popocatepetl either emits river-like floods of ash or undergoes a Plinian eruption every 1,650 years.
And one can mark the general theology of successive ministers, much like geological layers on the earth's crust, by noting the variety and number of the various translations.
Thousands of displaced pieces from the original Panorama - piers and warehouses with no industry to support them, brownstones and lofts demolished before they had a chance to be gentrified - are arranged in geological layers in this excavation of "forgotten" New York.
Phase 1 development represents the optimal development of four of the PSA geological layers in a safe and sustainable manner to the benefit of all stakeholders.
This method was also used in this study to determine resonant frequencies of upper geological layers in the locality at Zlate Hory, Northern Moravia, the Czech Republic.

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