unconformity

un·con·for·mi·ty

U0040900 (ŭn′kən-fôr′mĭ-tē)n. pl. un·con·for·mi·ties 1. Lack of conformity; nonconformity.2. Geology A surface between successive strata representing a missing interval in the geologic record of time, and produced either by an interruption in deposition or by the erosion of depositionally continuous strata followed by renewed deposition.

unconformity

(ˌʌnkənˈfɔːmɪtɪ) n, pl -ties1. lack of conformity2. (Geological Science) the contact surface between younger and older rocks representing a discontinuity in the geological record. Most commonly it represents an erosional surface

un•con•form•i•ty

(ˌʌn kənˈfɔr mɪ ti)

n., pl. -ties. 1. lack of conformity; incongruity; inconsistency. 2. Geol. a discontinuity in a stratigraphic sequence. [1590–1600]

unconformity

A level where sedimentary rocks cover an older rock surface partly removed by erosion. The level marks a time gap.

Unconformity

unconformity

[¦ən·kən′fȯr·məd·ē] (geology) The relation between adjacent rock strata whose time of deposition was separated by a period of nondeposition or of erosion; a break in a stratigraphic sequence.

Unconformity

(geology), the occurrence of relatively young strata of rock on the erosion surface of older strata. There are two main types of unconformities: parallel and angular. In parallel unconformities (disconformities), strata of different ages lie parallel to one another and are separated only by an erosion surface—a stratigraphic break. In angular unconformities (disconformities), strata of different ages are not only separated by an erosion surface but dip at different angles; as a result, the ends of the old strata abut the base of the younger overlying stratum. Angular unconformities are formed when previously deposited strata have been tilted or folded and then the upper parts of the strata destroyed (by marine erosion, for example) and layers of a new stratum deposited on the erosion surface.

The study of unconformities is of great importance in elucidating the history of the movements and deformations of the earth’s crust. Analysis of unconformities also helps date magmatic activity, ore formation, and other geological processes.

单词	unconformity
释义	unconformity un·con·for·mi·ty U0040900 (ŭn′kən-fôr′mĭ-tē)n. pl. un·con·for·mi·ties 1. Lack of conformity; nonconformity.2. Geology A surface between successive strata representing a missing interval in the geologic record of time, and produced either by an interruption in deposition or by the erosion of depositionally continuous strata followed by renewed deposition. unconformity (ˌʌnkənˈfɔːmɪtɪ) n, pl -ties1. lack of conformity2. (Geological Science) the contact surface between younger and older rocks representing a discontinuity in the geological record. Most commonly it represents an erosional surface un•con•form•i•ty (ˌʌn kənˈfɔr mɪ ti) n., pl. -ties. 1. lack of conformity; incongruity; inconsistency. 2. Geol. a discontinuity in a stratigraphic sequence. [1590–1600] unconformity A level where sedimentary rocks cover an older rock surface partly removed by erosion. The level marks a time gap. Unconformity unconformity [¦ən·kən′fȯr·məd·ē] (geology) The relation between adjacent rock strata whose time of deposition was separated by a period of nondeposition or of erosion; a break in a stratigraphic sequence. Unconformity (geology), the occurrence of relatively young strata of rock on the erosion surface of older strata. There are two main types of unconformities: parallel and angular. In parallel unconformities (disconformities), strata of different ages lie parallel to one another and are separated only by an erosion surface—a stratigraphic break. In angular unconformities (disconformities), strata of different ages are not only separated by an erosion surface but dip at different angles; as a result, the ends of the old strata abut the base of the younger overlying stratum. Angular unconformities are formed when previously deposited strata have been tilted or folded and then the upper parts of the strata destroyed (by marine erosion, for example) and layers of a new stratum deposited on the erosion surface. The study of unconformities is of great importance in elucidating the history of the movements and deformations of the earth’s crust. Analysis of unconformities also helps date magmatic activity, ore formation, and other geological processes. ThesaurusSeeunconformable
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