unconformity
Example Sentences
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It echoes James Playfair’s description of the “abyss of time” he glimpsed while viewing a strata unconformity at Siccar Point in 1788, when geology was first emerging as a science.
From The Guardian ● Apr. 20, 2019
These desert-formed sandstones sit above an unconformity, and this suggests that after a long period with a humid climate, the climate became drier and wind became the dominant agent shaping the environment at Gale Crater.
From BBC ● Mar. 22, 2018
She’s revising a manuscript describing an unconformity in the sedimentary layers of Mount Sharp, within the Gale crater, a record of the alternating wet-dry cycles on the planet.
From Science Magazine ● Jun. 29, 2017
There are three types of unconformities, nonconformity, disconformity, and angular unconformity.
From Textbooks ● Jan. 1, 2017
Upon the folded slates and schists which constitute these inliers the Devonian rests with marked unconformity; but north of the ridge of Condroz Ordovician and Silurian beds make their appearance.
From Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 5 "Arculf" to "Armour, Philip" by Various
Disconformities are unconformities that occur between parallel layers of strata indicating either a period of no deposition or erosion.
From Textbooks ● Jan. 1, 2017
There are three types of unconformities, nonconformity, disconformity, and angular unconformity.
From Textbooks ● Jan. 1, 2017
Gaps in the geological record are represented by various types of unconformities.
From Textbooks ● Jan. 1, 2015
Recognizing unconformities is important for understanding time relationships in sedimentary sequences.
From Textbooks ● Jan. 1, 2015
It is largely by means of unconformities that we read the history of mountain making and other deformations and movements of the crust.
From The Elements of Geology by William Harmon Norton
