Bulletin . ck No. .do. No. No. 2 Hillside. No. 2 Slope Roslvn Coal & Coke Co. RoslynFurl i .iRoslyn Cascade Coal Fuel Improvement Co Yakima-Roslyn Coal Co. No. o North western Improvement Co. No. DaD Summit Roslvn Fuel Co. No. 7 Northwestern Improvement Co. [•] ! «... Cle Eluin Coal Co. Cle Elum No. l Northwestern Emprovt Queen Roslyn Fuel Co. MAP OF ROSLYN COAL FIELD. SHOWING KNOWN AND PROBABLE EXTENT OF ROSLYN BED, ALSO LOCATION OFMINES. KNOWN EXTENT OF BED INDICATED BY CONTINUOUS LINES; PROBABLE EXTENT BY BROKENLINES. 42450°—24. (Pace p, B8.) n? E
Bulletin . ck No. .do. No. No. 2 Hillside. No. 2 Slope Roslvn Coal & Coke Co. RoslynFurl i .iRoslyn Cascade Coal Fuel Improvement Co Yakima-Roslyn Coal Co. No. o North western Improvement Co. No. DaD Summit Roslvn Fuel Co. No. 7 Northwestern Improvement Co. [•] ! «... Cle Eluin Coal Co. Cle Elum No. l Northwestern Emprovt Queen Roslyn Fuel Co. MAP OF ROSLYN COAL FIELD. SHOWING KNOWN AND PROBABLE EXTENT OF ROSLYN BED, ALSO LOCATION OFMINES. KNOWN EXTENT OF BED INDICATED BY CONTINUOUS LINES; PROBABLE EXTENT BY BROKENLINES. 42450°—24. (Pace p, B8.) n? EASTERN WASHINGTON. 59 TOPOGRAPHY. The topography of the Roslyn field is controlled largely by astratum of massive sandstone which overlies the Roslyn bed. Alongthe northeastern limits of the field, where the drainage is into theTeanaway Basin, the hillsides are rather steep. From the edge ofthis bluff the beds dip southwesterly at an average angle of about10° and the surface conforms to this Figure 26.—Map of Kittitas County, showing Roslyn-Cle Elum, Taneum, and Manastashcoal fields and transportation lines. At the level of the railroad, which extends from northwest tosoutheast along the middle of the field, the surface becomes flatterand has been subjected to modification by erosion and by depositionof river gravels. This condition exists until the Cle Elum River isreached, at the western margin of the field, where the contact be-tween the Teanaway basalt and the Roslyn formation occurs. Fromthis point to the west and northwest rugged hills of igneous rock 60 COAL-MINING PROBLEMS IN THE STATE OF WASHINGTON. modified by erosion are the predominating feature. The elevationsin the field range from 1,900 feet above sea level at Cle Elum to 3,700feet along the eastern margin of the coal area. STRATIGRAPHY. The Roslyn formation, in which the coal occurs, has a thicknessof approximately 3,500 feet, the upper 1,200 feet of which has beenpenetrated by drill holes in the
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectminesandmineralresou
