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Webster 1913 Edition
Unconformability
Unˊcon-formˊa-bil′i-ty
,Noun.
1.
The quality or state of being unconformable; unconformableness.
2.
(Geol.)
Lack of parallelism between one series of strata and another, especially when due to a disturbance of the position of the earlier strata before the latter were deposited.