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
Here are three graphical illustrations of the three types of unconformity.
From Textbooks ● Jan. 1, 2017
The unconformity is marked in England, parts of Egypt, on the Atlantic coastal plain and in the eastern gulf region of N. America, as well as in the marine Eocene of western Oregon.
From Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 6 "English Language" to "Epsom Salts" by Various
There are three types of unconformities, nonconformity, disconformity, and angular unconformity.
From Textbooks ● Jan. 1, 2017
Disconformities are unconformities that occur between parallel layers of strata indicating either a period of no deposition or erosion.
From Textbooks ● Jan. 1, 2017
Gaps in the geological record are represented by various types of unconformities.
From Textbooks ● Jan. 1, 2015
There are four types of unconformities, as summarized in Table 8.1, and illustrated in Figure 8.9.
From Textbooks ● Jan. 1, 2015
Pre-Cambrian time probably was longer than all later geological time down to the present, as we may infer from the vast thicknesses of its rocks and the unconformities which part them.
From The Elements of Geology by Norton, William Harmon
