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analyses anticline base bed in sec beds of coal bench Bighorn Basin bituminous Bone bony Bridger British thermal units brown Bull Mountain carbonaceous Clay coal beds coal field coal group Coal Shale coal-bearing rocks Colorado contains Cretaceous Dietz Divide Basin drab Eagle sandstone east escarpment exposed extends fault feet thick Fixed carbon following section geologic gray inches thick Laramie formation lignite Limestone locality located lower Mancos Mesa Mesaverde coal Mesaverde formation Miles City mines moisture Montana northeast northwest opened outcrop places prospect Red Lodge region ridges Rock Springs sand sandstone sandy Section of coal Sentinel Butte Shale 1 Coal shaly side slope soft southwest strata subbituminous Survey syncline Tertiary thin beds Tongue River Total coal U. S. Geol unconformity Union Pacific Railroad upper valley vicinity Volatile matter Wasatch workable thickness Wyoming Yampa
Page 294 - Most of the territory north of the base line has been either recently resurveyed by the General Land Office, or the contracts have been let and it is expected that the work will be completed in the near future. On the other hand, in the territory south of the base line and west of the twelfth auxiliary guide meridian, the old land surveys are believed to be in large part practically without value, and very few corners were discovered in the present investigation.
Page 423 - WH Weed. Geologic Atlas US, folio 1, 1894. Three Forks folio, Montana, description, by AC Peale. Geologic Atlas US, folio 24, 1896. Geology and mineral resources of the Judith Mountains of Montana, by WH Weed and LV Pirsson.
Page 251 - ... Craig, Colo. If it is built from Rawlins the Mesaverde coals in the eastern part of the area will be developed; if from Wamsutter, the basal upper-group coals from the old Washakie stage station southward will probably be opened; and in either case the coals near Little Snake River will be thoroughly prospected and worked.
Page 309 - ... normal position. The beds are very soft and broken, but nevertheless some of the coal is still hard. The coal bed is very irregular and at no place was more than a few inches of coal visible, although it was confidently stated that the bed was 3 feet thick at the bottom of the pit, which had then caved. No trustworthy estimate of the true character of the bed can be obtained until the coal is found in place and in a normal position. It is reported that several prospects on Burnt Fork, farther...
Page 428 - The coal fields of Texas, by RT Hill. Mineral Resources US for 1892, 1893, pp. 507-510. Reconnaissance in the Rio Grande coal fields of Texas, by TW Vaughan.
Page 416 - Report on the operations of the coal-testing plant of the United States Geological Survey at the Louisiana Purchase Exposition, St. Louis, Mo., 1904. E. W. Parker, JA Holmes, MR Campbell, committee in charge. Prof. Paper No. 48, 1906. (In three parts.) 1,492 pp.
Page 13 - ... of such a size as to yield at least 5 pounds of coal per foot of thickness of coal bed — that is, 5 pounds for a bed 1 foot thick, 10 pounds for a bed 2 feet thick, 20 pounds for a bed 4 feet thick, etc. •1. All material encountered in such a cut should be included in the sample, except partings or binders more than three-eighths inch in thickness and lenses or concretions of sulphur or other impurities greater than 2 inches in maximum diameter and one-half inch in thickness.
Page 422 - Economic geology of the Kenova quadrangle, Kentucky, Ohio, and West Virginia, by WC Phalen.
Page 13 - In order to make determinations of the loosely held moisture more uniform and definite, a special drying oven has been designed and introduced into the laboratory. In this oven samples of several pounds weight can be dried in a gentle current of air, raised from 10° to 20° above the temperature of the laboratory. In this way the coal is...