File:Allegany County (1900) (14774285921).jpg

Identifier: alleganycount00mary (find matches)
Title: Allegany County
Year: 1900 (1900s)
Authors: Maryland Geological Survey Abbe, Cleveland, 1838-1916 O'Harra, Cleophas C. (Cleophas Cisney), 1866-1935 Clark, William B Dorsey, Clarence W Fassig, Oliver L. (Oliver Lanard), 1860-1936 Newell, Frederick Haynes, 1862-1932 Bauer, L. A. (Louis Agricola), 1865-1932 Sudworth, George B Merriam, C. Hart (Clinton Hart), 1855-1942 Preble, Edward A. (Edward Alexander), 1871-1957
Subjects: Geology Mines and mineral resources Physical geography Forests and forestry
Publisher: Baltimore : Johns Hopkins Press
Contributing Library: Robarts - University of Toronto
Digitizing Sponsor: University of Toronto

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Fig. 3.—Drainaire about (. umberland. on Schooley Plain The stream-revival which caused the etching out of the Shenan-doah, the Town Creek, and other valleys, also started Wills Creek ona period of rapid down-cutting. In the course of the first rapidtrenching of the stream-channels, the buried crest of the Wills Moun-tain arch was notched by Jennings Run and Braddock Run. Thefurther removal of the overlying beds exposed the whole long arch ofsandstone. Finally, when the valleys and notches had been reduced MARYLAND GEOLOGICAL SURVEY. ALLEGANY COUNTY, PLATE V.
Text Appearing After Image:
GEORGES CREEK VALLEV, NEAR BARTON. ilAEYLAXD GEOLOGICAL SCEVZT 4:9 to the general level of the then low-lying Shenandoah Plain, WillsMountain stood out as a long ridge whose crest was cut in two placesbv watergaps (Tig. 2, Wg and Xr). One of these is still a watergapand is occupied by Wills Creek, i. e. it is The Xarrows. Theother notch is now the windgap from which Braddock Run has beendiverted (Fig. 7). During this cutting down to the ShenandoahPlain, Jennings Run developed a small subsequent tributary alongthe easy path between Little Allegheny and Wills mountains. Thisstream has in later time developed more rapidly than its olderbrothers, Jennings Run and Braddock Run. This is for the reasonthat it is located along yielding rocks, while the other branches haveto contend with both Pocono and Pottsville sandstones. It is nowthe main stream of Wills Creek. TOPOGRAPHIC HISTORY. Stages e? the Topographic History.In the foregoing discussion of the topography of Allegany county,certain f

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