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

View Book Page: Book Viewer
About This Book: Catalog Entry
View All Images: All Images From Book
Click here to view book online to see this illustration in context in a browseable online version of this book.

Text Appearing Before Image:
eferred by Dall with doubt to the Eocene. They dip to the northeastward atan angle of 25°, and appear to plunge beneath the great irreg-ular synclinal mass of sandstone which forms in this latitude the mainbody of the Coast Range. SANDSTONES. The sandstone which prevails in the upper portion of the series ofbeds belonging to the Eocene is best exposed in the prominent moun-tain escarpment 1- miles directly west of Hoseburg. PI. VII showsthe escarpment in the distance. At this point, as shown in tig. 4, the sandstone near its middle has athin parting of shale which contains vegetal fragments. It is the same sandstone which forms the crest from Tyce Mountainto Camas and apparently passes through the divide iCamas Mountain)between Olalla Creek and the Middle Fork of the Coquille to TableMountain near Nichols Station. At Table Mountain nearly 2,000 feetof approximately horizontal sandstone arc exposed, and near the summit it contains fossils which occur in the Eocene. The same is true of
Text Appearing After Image:
a EOCENE. 463 the east slope of Camas Mountain, where in sandstone overlying theshale a few other apparently Eocene forms were found. The fossils inthis sandstone, however, are not so characteristically Eocene as arethose of the shale at BushnelFs mine and near Dickinsons Eock, in thethe same neighborhood. From tlie bold front stretching from Tyee Mountain to Camas thesandstone extends westward toward the ocean and forms the mass ofthe Coast Range. It is well exposed along the old stage road fromRoseburg to Coos Bay, in the canyon cut by the East Fork of theCoquille, and on the new stage road in the canyon of the Middle Forkof the same river, for nearly 20 miles west of Camas Prairie. It con-tains fossils 2 miles northwest of Remote, at Elbow Hill, and oppositethe mouth of Boulder Creek. Fragments of Tapes, Natica, Ostrea,Tellina, Solen, Venus, Mactra, and Area are reported by Dall, but nopositive determination of species or of age is given. The dip of the bedsis such as to indicate t

Note About Images