Definition of inlier in English:

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Pronunciation: /ˈinˌlīər/


An older rock formation isolated among newer rocks.
Example sentences
  • At the base of the erosional hollow, an inlier of Jurassic rocks crops out below the late Cimmerian unconformity.
  • These rocks do not, however, crop out as a continuous mountain range but in isolated inliers, many of which were uplifted during the Tertiary in response to Alpine movements.
  • However, it is thought that the Lower Palaeozoic inliers to the southeast (Kildare and Leinster Massif) were emergent at the time of mineralization.


Mid 19th century: from in, on the pattern of outlier.

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