Definitions
from The Century Dictionary.
- noun The condition of not being conformable: as, the unconformability of two groups of rocks. See
conformable , with diagram illustrating the relative position of conformable and unconformable rocks.
from the GNU version of the Collaborative International Dictionary of English.
- noun The quality or state of being unconformable; unconformableness.
- noun (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.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun geology The quality or state of being
unconformable . - noun geology Lack of
parallelism between one series ofstrata and another, especially when due to a disturbance of the position of the earlier strata before the latter weredeposited .
Etymologies
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Examples
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It would be easy to multiply instances of similar unconformability in formations of other ages; but a few more will suffice.
The Harvard Classics Volume 38 Scientific Papers (Physiology, Medicine, Surgery, Geology) Various
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The readiest way, perhaps, of persuading the reader that we may dispense with great and sudden revolutions in the geological order of events is by showing him how a regular and uninterrupted series of changes in the animate and inanimate world must give rise to such breaks in the sequence, and such unconformability of stratified rocks, as are usually thought to imply convulsions and catastrophes.
The Harvard Classics Volume 38 Scientific Papers (Physiology, Medicine, Surgery, Geology) Various
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That the subterranean forces have visited different parts of the globe at successive periods is inferred chiefly from the unconformability of strata belonging to groups of different ages.
The Harvard Classics Volume 38 Scientific Papers (Physiology, Medicine, Surgery, Geology) Various
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The unconformability of the ochraceous clay and the underlying sandstones might lead to the idea that the two formations belong to distinct geological periods, and are not due to the same agency, acting at successive times.
The Atlantic Monthly, Volume 18, No. 106, August, 1866 Various
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It would be easy to multiply instances of similar unconformability in formations of other ages; but a few more will suffice.
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The readiest way, perhaps, of persuading the reader that we may dispense with great and sudden revolutions in the geological order of events is by showing him how a regular and uninterrupted series of changes in the animate and inanimate world must give rise to such breaks in the sequence, and such unconformability of stratified rocks, as are usually thought to imply convulsions and catastrophes.
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That the subterranean forces have visited different parts of the globe at successive periods is inferred chiefly from the unconformability of strata belonging to groups of different ages.
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I thought I had found a case of unconformability, indicating a slip of one portion of the glacier over another, but when I came to examine the intermediate region (X) carefully, I found the structural planes at every intermediate angle, and consequently a perfect transition from the one to the other.
The Life and Letters of Thomas Henry Huxley Huxley, Leonard 1900
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The alternations of marine and freshwater deposits, and the frequent unconformability of strata with those which overlie them, tell us plainly of repeated elevations and depressions of the surface, and of denudation on an enormous scale.
Darwinism (1889) Alfred Russel Wallace 1868
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I thought I had found a case of unconformability, indicating a slip of one portion of the glacier over another, but when I came to examine the intermediate region (X) carefully, I found the structural planes at every intermediate angle, and consequently a perfect transition from the one to the other.
Life and Letters of Thomas Henry Huxley — Volume 1 Thomas Henry Huxley 1860
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