File:The preglacial drainage of Ohio; comprising the results of researches (1900) (14793767703).jpg

Identifier: preglacialdraina00colu (find matches)
Title: The preglacial drainage of Ohio; comprising the results of researches
Year: 1900 (1900s)
Authors:
Subjects: Geology
Publisher: Columbus, O., Press of F.J. Heer
Contributing Library: The Library of Congress
Digitizing Sponsor: The Library of Congress

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and isseparated from it by a high ridge but a few miles wide. CHARACTERS OF THE HOCKING VALLEY BELOW ATHENS. At Athens there is a large loop in the Hocking River and thevalley is quite broad. Some distance below the city the presentriver has crossed an old col. The valley is not as narrow asmight be expected but the presence of the old col is shown by thevertical cliffs that face the river and the persistency of the oldwater shed at its maximum elevation, up to the very walls of thevalley. Below this col the valley gradually widens and the walls be-come less precipitous, although they remain quite steep, to thebend at Guysville. Below this point the valley gradually nar-rows again to the mouth of Federal Creek. Below this the nar-rowing is much more abrupt and at the point marked col on themap the valley is a very narrow gorge with vertical rock walls.There were here several channel ways during the cutting out ofthe old col by the present river. Some of these were cut nearly PLATE IV.
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TIGHT —Drainage Modifications. THE PREC.LACIAL DRAINAGE OF OHIO. 23 to the present level of the river so that the bold rock cliffs andthe numerous deep ravines present very picturesque scenery.Below this col the valley gradually broadens again and the wallsbecome less precipitous as far down as Coolvillc, (plate IV).Between Coolville and its mouth the river again passes througha narrows. That the narrows at this point is the site of an oldcol is not so evident as in the other cases farther up the river. CHARACTER OF THE FEDERAL CREEK VALLEY. A Study of this valley was not included under the outlmeplanned for the work for the Academy, but it soon became evi-dent, from the field work, that under one of the working hypoth-eses it might prove to be in the line of discharge of the watersof the Muskingum, so that its investigation became necessary.The divide separating the w^aters of Federal Creek from thoseof Wolf Creek and the Little Hocking was carefully examinedfor an abandoned valley

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