un conformity


noun, plural unconformities.
lack of conformity; incongruity; inconsistency.
a discontinuity in rock sequence indicating interruption of sedimentation, commonly accompanied by erosion of rocks below the break.
the interface between such strata. See illus. under unconformable.

1590–1600; un-1 + conformity

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World English Dictionary
unconformity (ˌʌnkənˈfɔːmɪtɪ)
n , pl -ties
1.  lack of conformity
2.  the contact surface between younger and older rocks representing a discontinuity in the geological record. Most commonly it represents an erosional surface

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American Heritage
Science Dictionary
unconformity   (ŭn'kən-fôr'mĭ-tē)  Pronunciation Key 
A surface between successive strata representing a missing interval in the geologic record of time, produced either by an interruption in deposition or by the erosion of depositionally continuous strata followed by renewed deposition. An unconformity is a type of discontinuity.
The American Heritage® Science Dictionary
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