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The vertical depth, measured in geometric or geopotential units, of a layer in the atmosphere bounded by surfaces of two different values of the same physical quantity, usually constant-pressure surfaces.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



(geology), the thickness of a stratum (vein, lens) or complex of geological deposits (suite, stage, series, system, lava sheets). A distinction is made between the true thickness (t) measured by the length of a perpendicular between the roof and floor of a stratum and the thickness visible on the earth’s surface (s). The true thickness is determined by the formula t = s sin (δ + σ), where δ is the angle of dip of the stratum and σ is the angle of inclination of the earth’s surface. The thickness of each stratigraphic subdivision varies along the strike.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
Since there are no reference values for retinal thicknesses and volumes in childhood with the device we used (TOPCON 3D OCT-1000), we proceeded to calculate our own for each macular and papillary sector measurement, using the data from the group of healthy controls (Table 4).
Lee, "Thicknesses of the fovea and retinal nerve fiber layer in amblyopic and normal eyes in children," Korean Journal of Ophthalmology, vol.
Large variations in the retinal thicknesses in both the normal SD and SDT rats in this experiment were seen and may present individual variations.
"Application technology is driving the development of tool coatings that are more durable at reduced thicknesses, bring improved lubricity to aid release of extremely tight-tolerance parts, or protect better against erosion and corrosion," says David Bell, CEO of Phygen, a coating service supplier with an advanced, patented process.
By using two specimens of different thickness, the thermal conductivity of the coating can be determined as long as the surface finishes of the two specimens are similar and the thicknesses o f the substrates are within a few percent.
Phone: (800) 521-4250 Services: Limited CTS & sanding to thickness tolerances Main customers: Panel producers & store fixture producers Standard sizes: 4 ft x 8 ft, 4 ft x 10 ft, 4 ft x 16 ft & 5 ft x 8 ft Thicknesses: 1/8 in., 3/16 in.
Li, "Topographic variation of choroidal and retinal thicknesses at the macula in healthy adults," British Journal of Ophthalmology, vol.
Statistical significances of RNFL thicknesses in ONH size groups (classified as small, medium and large) were analyzed with one-way ANOVA.
Showing LayerGauge optical off-line measuring instrument, which uses white light to measure individual layer thicknesses in transparent or semi-transparent multilayer films.
However, recent studies have shown that the traditional rule of thumb for using cast steels with wall thicknesses of greater than 6 mm is overly conservative.
X-ray photoelectron spectroscopy (XPS) is one of the techniques that have been used to measure silicon dioxide film thicknesses. The measured thicknesses depend on knowledge of the effective attenuation length (EAL) of the detected photoelectrons in SiO2 for the particular film thickness and measurement configuration.
As a method that provided for rapid results, and could also be used with varying thicknesses, it was decided that a visual observation of the part cross-section would provide for a reasonable method to determine the approximate state of cure.