Contributions to Economic Geology (short Papers and Preliminary Reports), 1912, Oplag 541U.S. Government Printing Office, 1914 |
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analysis anticline Basin Bearpaw bed of lignite bench Big Muddy Creek Bituminous coal Bone British thermal units brown buttes calcareous Cannonball River carbonaceous Clay Clintwood coal bed coal field coal-bearing contains County Creek Dakota depth district drift drilled east exposed exposures fault feet thick Fork Fort Union formation fossils geologic gray heating value inches thick included in sample Judith River formation Lance formation lignite lignite bed limestone locality lower map Pl mined moisture Montana Mountain mouth northeast northwest outcrop places point of sampling Pound River probably prospect quadrangle region reported ridge rocks Sample cut Sample dry sand sandstone Section at point Section of coal Shoshone River shown Sierra Blanca slope southeast strata stratigraphic strip pit structure surface Survey Bull syncline thin beds tion township U. S. Geol Union formation Upper Elkhorn valley vicinity weathered White Oaks
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Side 469 - The gram calorie, or small calorie (cal.), is the amount of heat required to raise the temperature of 1 gram of water 1°...
Side 241 - The Cannonball marine member of the Lance formation of North and South Dakota and its bearing on the LanceLaramie problem: Jour.
Side 272 - Mont., over the lines of the Northern Pacific and the Chicago, Milwaukee & St Paul railways, found unreasonable.
Side 350 - Analysis C represents the theoretical condition of the coal after all the moisture has been eliminated. Analysis D represents the coal after all moisture and ash have been theoretically removed. This is supposed to represent the true coal substance, free from the most important impurities.
Side 150 - Mojave offers practically no promise of becoming a productive oil field, and further drilling will prove but a waste of money. The principal reasons for believing that this land will not prove productive are (1) the lack of strata from which it would seem reasonable to believe that oil might have been formed, especially the lack of thick masses of organic material (diatomaceous and foraminiferal shale) such as those which occur in or near all the oil fields in the southern half of California and...
Side 408 - Therefore, in the column headed "Calories," the heat values are given to the nearest five units and in the column headed "British thermal units" they are given to the nearest ten (the value of a British thermal unit being about onehalf that of a calorie).
Side 150 - The oil at this place occurs in fractured schists which rest upon the granite of the San Gabriel Mountains. The most logical explanation for the presence of the oil here is that it has migrated from early Tertiary organic shales which may have at one time rested upon the metamorphic rocks and which may now occur in the vicinity beneath the unconformably overlying late Tertiary beds. In the Santa Clara River Valley, a few miles west of Placerita Canyon, the early Tertiary strata and the beds in contact...
Side 152 - Even if oil was originally distributed in minute quantities through the rocks, the structure is not such that it would have tended to collect or trap the oil. Irregular and faulted folds occur in at least three places northwest of Barstow — the Barstow syncline in T. 11 N.. R. 2 W.. a small anticline just north of the Giroux well in T. 32 S., R. 44 E., and an irregular fold or folds in T. 31 S.. R. 44 E. It is generally reported that a well-marked anticline passes through the hills north of Barstow....
Side 408 - This form is not well suited for comparative purposes, for the amount of moisture in the sample as it comes from the mine is largely a matter of accident, and consequently analyses of the same coal expressed in this form may vary widely.
Side 446 - This form is not well suited for comparison, because the amount of moisture in the sample as it comes from the mine is largely a matter of accident and consequently analyses of the same coal expressed in this form may vary widely.