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Definition of exposure

i. An area of a rock formation or geologic structure that is visible (hammerable), either naturally or artificially, i.e., is unobscured by soil, vegetation, water, or the works of humans; also, the condition of being exposed to view at the Earth's surface.

Compare with: outcrop

ii. The nature and degree of openness of a slope or place to wind, sunlight, weather, oceanic influences, etc. The term is sometimes regarded as a syn. of aspect.

Ref: AGI

iii. The proportional mass of a diamond or other cutting medium protruding beyond the surface of the metal in which it is inset in the face of the bit. Sometimes incorrectly called clearance.

Ref: Long

iv. The total quantity of light received per unit area on a sensitized plate or film, usually expressed as the product of the light intensity and the time during which the light-sensitive material is subjected to the action of light. A loosely used term generally understood to mean the length of time during which light is allowed to act on a sensitive surface. The act of exposing a light-sensitive material to a light source. An individual picture of a strip of photographs.

Ref: AGI

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