Identifier: annualreportofun1711geol (find matches)
Title: Annual report of the United States Geological Survey to the Secretary of the Interior
Year: 1880 (1880s)
Authors: Geological Survey (U.S.)
Subjects: Geological Survey (U.S.) Geology Water-supply Forest reserves Mines and mineral resources
Publisher: Washington : G.P.O.
Contributing Library: University of Illinois Urbana-Champaign
Digitizing Sponsor: University of Illinois Urbana-Champaign

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e accompanying map, PI. IV, the route is illustrated. FEATURES OF THE COAST RANGE OF OREGON. The Coast Range of Oregon is an irregular ridge or series of ridgeswith bold lateral spurs, especially on the ocean side. It varies muchfrom place to place, yet nowhere does it attain a great altitude. Theelevations of its summits have not yet been accurately determined anywhere, and only in a few places has the height of peaks been evenapproximately measured. Saddle Mountain, which is a rugged sum-mit seen to the southeast from the Astoria, has a bold peak outlinedagainst the sky, and attains an altitude (aneroid) of over 3,326 feet.Of this view Professor Dana1 remarks that there was one brokensummit to the southeast, calculated to engage the attention j it iscalled by the Indians Swalalahos. and has also been named Saddle 11 ill. 1 Wilkes Exploring Expedition, Vol. X,p. 615.J Iacitie Knilroiul Survey, Vol. VI, It, II, p. 29. SEVENTEENTH ANNUAL REPORT PART I PL. IV U. S. GEOLOGICAL SURVEY „
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MAP OF NORTHWESTERN OREGON, SHOWING ROUTE. The route of travel is indicated by a broken line. The dark-lined incosed areas represent coal fields. The numbered dots indicatelocalities where fossils were found ; 1 = Pleistocene, 2 = Pliocene, 3 = Miocene, 4 = Oligocene, 5 = Eocene. THE COAST RANGE OF OREGON. 449 Onion Peak, farther westward, is of nearly equal height. Both areold volcanoes and belong- to the volcanic ridge which runs transverseto the gener.il trend of the Coast Eange. As shown in PI. V. it beginsat the west, in the Ne ah kah nie Mountains, just north of the mouthof the ifehalem, and stretches northeast through Union Peak, SaddleMountain, and other summits, to the Columbia, near Westport. Thebold .escarpment of the north bank of the Columbia at this pointbelongs to the same line of elevations extending into Washington. A noteworthy feature of this ridge, especially about Saddle Moun-tain, and to a less extent also through portions of the Coast Eange, isthe occasional occ

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