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Updated: May 12, 2025
"Mallow's been selling oil stock and experting wells for us with the Marvelous Magnetic Finder and he don't know an offset from a headache post." "Certainly, I know " "Why, Professor! Is it possible we have been deceived in you? An offset is the thing that sets off to one side of the crown block and it's a light blue, the same as a formation. It's the shape of a syncline, only bigger."
"This apparently is true not only of the segments of thrust surface beneath eastern Flattop, Yellow, and Chief Mountain, but also of the more deeply buried portions which appear to dip with the Algonkian strata into the syncline. While observation is not complete, it may be assumed on a basis of fact that thrust surfaces and bedding are nearly parallel over extensive areas." Geol.
FOLDED STRUCTURES. An upfold, in which the strata dip away from a line drawn along the crest and called the axis of the fold, is known as an ANTICLINE. A downfold, where the strata dip from either side toward the axis of the trough, is called a SYNCLINE. There is sometimes seen a downward bend in horizontal or gently inclined strata, by which they descend to a lower level.
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