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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.



(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.

References in periodicals archive ?
However, the small thicknesses of some of the specimens results in a low thermal resistance of the coatings relative to that of the specimen/sensor-plate interface.
Lac-Megantic, Quebec Phone: (800) 667-4260 Services: Custom sizing in panels, thicknesses & for countertop uses Main customers: Residential, office furniture, kitchen & bath & store fixtures Standard sizes: 4 ft x 8 ft, 4 ft x 9 ft, 5 ft x 8 ft & 5 ft x 9 ft Thicknesses: Any from 1/4 in.
Inferior and average RNFL thicknesses were positively correlated with ONH size; the correlations were significant correlations but very weak (r=0.
As well as showing that the aqueous adhesives were effective in bonding all of the NBRs tested at normal film thicknesses, this work showed that some NBRs can be successfully bonded to metal with an extremely thin film of adhesive.
At the top of PCC's need list was a powerful, flexible system that could quickly penetrate a wide range of casting thicknesses.
Wall thicknesses that are not as good but still acceptable are indicated in yellow, while unacceptable wall thicknesses are shown in red.
The experiments first focused on different thicknesses of commonly used, white insulating coatings of 20 Be density that were sprayed on a 400F mold.
Not only did that delay response to gauge variations, but it meant measuring two thicknesses of film, adding together the thicknesses of two points several inches apart on the bubble.
The resulting toy was about 90% accurate in hitting target wall thicknesses, Randall reports.