unconformable

[uhn-kuhn-fawr-muh-buhl]
adjective
1.
not conformable; not conforming.
2.
Geology. indicating discontinuity of any type in a stratigraphic sequence.

Origin:
1585–95; un-1 + conformable

unconformability, noun
unconformably, adverb
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World English Dictionary
unconformable (ˌʌnkənˈfɔːməbəl)
 
adj
1.  not conformable or conforming
2.  (of rock strata) consisting of a series of younger strata that do not succeed the underlying older rocks in age or in parallel position, as a result of a long period of erosion or nondeposition
 
unconforma'bility
 
n
 
uncon'formableness
 
n
 
uncon'formably
 
adv

Collins English Dictionary - Complete & Unabridged 10th Edition
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Example sentences
The unconformable basal contact locally contains a bed of reworked phosphatic
  vertebrate and invertebrate fossils.
The contact between the members is sharp and unconformable.
The basal contact with the underlying unit is sharp and unconformable.
The lower contact is conformable in the northern portion of the basin and
  unconformable in the southern portion of the basin.
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