Washington Division of Geology and Earth Resources Open
STATE OF WASHINGTON DEPARTMENT OF NATURAL RESOURCES DIVISION OF GEOLOGY AND EARTH RESOURCES GEOLOGY AND ENERGY RESOURCES OF THE ROSLYN-CLE ELUM AREA, KITTITAS COUNTY, WASHINGTON By CHARLES W. WALKER OPEN FILE REPORT OF-80-1 November 1980 CONTENTS Page Geography and general description •.................. , ... , , ..... , .. , . • . 1 Ownership ............................................................. 1 Acknowledgment . 1 Previous coal mining and related activities ......•...................... , 1 Regional geology . , .. , ........... , . , ...................... , ..... , ...... , 3 Structural setting . 6 Detailed geology of the Roslyn coal field ....................... , .. , . • . 9 Coal quality . 14 Coal reserves . 19 Selected annotated bibliography . , ..... , ...•........................ , . • 22 Appendix - Coal sample data sheets . , .. , , , ...... , . , ........ , ... , . • . • 27 ILLUSTRATIONS FIGURES Figure 1. Generalized composite section through the 11 coal measures'' and detailed coal sections ...... Separate sheet 2. Ternary diagram: Volatile matter-ash-fixed carbon . • • . 15 TABLES Table 1. Summary of coal analyses of core from Drill Holes A, B, C, D, E, F . 16 2. Location of sampling points .......... , . • . • 17 3. Comparison of cleaning full size range versus coarse coal only; separation at 1. 80 specific gravity ........•.. , • 18 4. Chemical analysis of ash ................ , ......... ,.......... ·18 5. Estimated coal reserves ...••.••................. , . , ..... , . • 20 6. Summary of estimated possible coal reserves ........... , .... , 21 I Map No. lA Geologic map, with accompanying cross sections Map No. lB Aeromagnetic map Map No. lC Structure contour map-base of the Roslyn Formation Map No. 2 Borehole location map Map No. 3 Old mine workings and strip pit locations-Roslyn coal fields Map No. 4 Index to mine maps, seam No. 1 Map No. 5 Structure contour map, top of the No. 1 seam Map No. 6 Overburden isopach map, over No. 1 seam Map No. 7 Isopach map-seam No. 1, both benches Map No.
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