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Related to unconformity: disconformity


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.


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


(ˌʌn kənˈfɔr mɪ ti)

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


A level where sedimentary rocks cover an older rock surface partly removed by erosion. The level marks a time gap.
References in periodicals archive ?
This winter's drill programs successfully localized targets in both projects for CanAlaska's continued exploration efforts for the discovery of a major unconformity uranium deposit.
Additionally, an independent site survey contractor's analysis of site survey data over the Marlin and Great White prospects states that the geological sequence immediately above the interpreted Permo-Triassic unconformity is "likely" to contain zone(s) of gas.
As in neighbouring Algeria, the geology of Tunisia is dominated by a post-Paleozoic unconformity.
One vertical hole was completed to a depth of 1,006 metres (m), and the unconformity between Athabasca sandstone and basement rocks was intersected at a depth of 965 m.
Based on neighbouring historical drillhole data, depth to basement unconformity has been estimated in the order of 300 metres.
Five holes (1,645 metres total) were completed in Phase 1 drilling conducted in November and December 2011, with two holes encountering significantly anomalous alteration and another containing chloritic alteration at various intervals below the unconformity, a common feature found in the host rocks containing uranium mineralization.
The geology of the country is dominated by a major unconformity at the base of the Mesozoic, so that Triassic and younger Mesozoic rocks lie unconformably on Carboniferous and older sediments.
It covers the important unconformity between the ore-hosting Balmer volcanic rocks and the overlying sedimentary rocks.
Drilling in Area A focused on testing for the extension of basement hosted mineralization adjacent to Rio Tinto's Roughrider deposit and further delineating the northern boundary of the J Zone for unconformity associated mineralization.
RZ-10 begins slightly above the unconformity and appears to persist at lower depths.
LAS VEGAS -- Wave Uranium (OTCBB: WAVU) today announced it has completed mapping the unconformity between the Chinle and Moenkopi formations on portions of its mining claims and State leases in Grand County, Utah.
A ten-metre thick lower sandstone section immediately above the unconformity returned highly anomalous radioactivity from the down-hole gamma probe with a maximum reading of 1,174 cps (about 25X background, see below).