Example Sentences

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How does unconformability prove a lapse of time between the accumulation of the underlying and overlying strata?

From Geology by Geikie, James

Inferences derived from unconformable strata.—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.

From Principles of Geology or, The Modern Changes of the Earth and its Inhabitants Considered as Illustrative of Geology by Lyell, Charles, Sir

We may naturally expect the other proofs of unconformability will hereafter be detected at more than one point in so vast a succession of strata.

From The Student's Elements of Geology by Lyell, Charles, Sir

The chief guide in tracing these successive stages of growth is supplied by unconformability.

From Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 6 "Geodesy" to "Geometry" by Various

Sometimes these are distinguished by what is termed unconformability, that is, the lower series has been disturbed or inclined before the upper has been deposited upon it.

From The Chain of Life in Geological Time A Sketch of the Origin and Succession of Animals and Plants by Dawson, Sir J. William