unconformable

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unconformable

[¦ən·kən′fȯr·mə·bəl]
(geology)
Pertaining to strata that do not conform in position, dip, or strike to the older underlying rocks.
References in periodicals archive ?
Proterozoic sedimentary rocks of the Gowganda Formation unconformably overlie the Archean rocks in the Cobalt area.
2, #21; Gosselin and Simard 2001), in an outlier of Paleoproterozoic sedimentary rocks resting unconformably on Archean basement.
Nestor (1976) when it became evident that in western Estonia the Pentamerus oblongus Beds or the Rumba Formation unconformably overlapped different subunits of the Raikkula Stage.
All Permian formations are unconformably overlain by the Miocene-Pliocene Ogallala Formation.
These volcanic rocks, which host most of the mineralization in the Guazapares district, are unconformably overlain by a thick, predominantly rhyolitic ignimbrite sequence.
The late Llandovery limestones, unconformably overlapping the middle Llandovery dolomites (Kirikukula core, Kaljo 1970, p.
This is unconformably underlain by the muddy sand of allomember 2.
Tertiary sedimentary rocks unconformably overlie this sequence.
The Halifax Group is composed of slate, metasiltstone, and minor quartz metawacke deposited in a deep marine environment (Williams 1995) and is unconformably overlain by Horton Group sandstone and shale.