Bulletin - United States Geological Survey, Ausgabe 218

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Seite 21 - Coal resources of Alaska: Twenty-second Ann. Rept. US Geol. Survey, pt.
Seite 22 - ... alternating with light- and dark-coloured clays and shales. In places where the beds have been strongly folded, the clays and sands are altered into sandstones and shales. The age of the lignite beds is uncertain as no fossils were found in them, but they probably belong to the Tertiary. ' A lignite horizon, with one or more seams, occurs in this formation at a number of widely separated points, and apparently accompanies it throughout its whole extent. Seams of lignite outcrop on Rock creek...
Seite 22 - Disglomerates, alternating with light- and dark-coloured clays and shales. In places where the beds have been strongly folded, the clays and sands are altered into sandstones and shales. The age of the lignite beds is uncertain as no fossils were found in them, but they probably belong to the Tertiary.
Seite 48 - Schrader, FC, A reconnaissance In northern Alaska: Prof. Paper US Geol. Survey No. 20...
Seite 12 - A reconnaissance from Pyramid Harbor to Eagle City, Alaska, including a description of the copper deposits of the upper White and Tanana rivers. In Twenty-first Ann. Kept., pt, 2, 1900, pp. 331-391. A reconnaissance in the Tanana and White River basins, Alaska, in 1898.
Seite 23 - Company has taken up a block of coal lands on Coal Creek, and has commenced mining operations at a point a little over 7 miles from Klondike River, following Coal Creek and Rock Creek valleys, and about 20 miles from Dawson. * * * The workings of the mine consist of an incline...
Seite 58 - Report on coal and lignite of Alaska: Seventeenth Ann. Rept. US Geol. Survey, pt. 1, 1896, pp.

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