Geology of the Johnson Creek Quadrangle, Caribou County, Idaho, Ausgabe 1042U.S. Government Printing Office, 1956 - 23 Seiten |
Häufige Begriffe und Wortgruppen
Agate Alta Amethyst andesite anticline apatite Aquamarine average Azurite beach beryl bituminous calcareous calcite Canyon carbonate rock chalcedony chert cinnabar coal bed coarse color Comstock lode contains Creek deposits diameter district dolomite dunes east estimate euhedral faults feet thick feet-percent Flore County fossil francolite gem stone Geological Survey grains gray Haskell County hematite Henryetta Hill Idaho Almaden inches Kate Peak formation Le Flore County limestone localities Lousetown Lower Hartshorne magnetite McAlester medium-hard miles minerals mining Mountain mudstone nodular nodules northeastern occurs oil shale Oklahoma Oklahoma coalfield oolites opal opalitized outcrop oxide pegmatite pellets percent detrital quartz petrographic phosphatic Phosphoria formation phosphorite Puerto Rico pyrite quadrangle Quartz crystal radioactive Range reserves rhyolite Río River samples sand sandstone sediments southern strata syenite syncline thick-bedded thin thin-bedded thorogummite tonnage tons tourmaline Truckee formation U. S. Geol unit uranium vanadium Wyoming zircon zone
Beliebte Passagen
Seite 303 - Moist Btu refers to coal containing its natural bed moisture but not including visible water on the surface of the coaL A It is recognized that there may be noncaking varieties in each group of the bituminous class.
Seite 25 - This work is part of a program conducted by the US Geological Survey on behalf of the Division of Raw Materials of the US Atomic Energy Commission.
Seite 191 - Scale of Hardness 1. Talc 6. Orthoclase 2. Gypsum 7. Quartz 3. Calcite 8. Topaz 4. Fluorite 9. Corundum 5. Apatite 10. Diamond...
Seite 303 - This classification does not include a few coals, principally nonbanded varieties, which have unusual physical and chemical properties and which come within the limits of fixed carbon or calorific value of the high-volatile bituminous and subbituminous ranks.
Seite 305 - ... measured, indicated, and inferred. Measured coal is coal for which tonnage is computed from dimensions revealed in outcrops, trenches, mine workings, and drill holes. The points of observation and measurement are so closely spaced, and the thickness and extent of the coal are so well defined that the computed tonnage is judged to be accurate within 20 percent or less of the true tonnage.
Seite 303 - There are three varieties of coal in the high-volatile C bituminous coal group, namely, Variety 1, agglomerating and nonweathering; Variety 2, agglomerating and weathering; Variety 3, nonagglomerating and nonweathering.
Seite 305 - Indicated coal is coal for which tonnage is computed partly from specific measurements and partly from projection of visible data for a reasonable distance on geologic evidence.
Seite 303 - Btu, 13,000 or more and less than 14,000Moist Btu, 11,000 or more and less than 13,000Moist Btu, 11,000 or more and less than 13,000...
Seite 241 - Mahogany zone) yielding an average of 45 gallons of oil per ton and ranging from 5 to 31 feet in thickness contains a total of more than 7 billion tons of shale and 7.5 billion barrels of oil, (2) shale zones yielding an average of 30 gallons of oil per ton and ranging from 15 to 180 feet in thickness contain about 137.5 billion tons of shale and about 98.8 billion barrels of oil, (3) shale zones yielding an average of 25 gallons of oil per ton and ranging from 15 to 780 feet in thickness contain...
Seite 306 - Inferred reserves are those for which quantitative estimates are based largely on broad knowledge of the geologic character of the deposit and for which there are few, if any, samples or measurements. The estimates are based on an assumed continuity or repetition, of which there is geologic evidence; this evidence may include comparison with deposits of similar type.