Bulletin, 325-329. sayılarU.S. Government Printing Office, 1949 |
Kitabın içinden
70 sonuçtan 1-5 arası sonuçlar
Sayfa 3
... prospecting by drilling and other means has been done to determine the extent of the coal beds . The greater part of the information thus obtained was available and has been used in the preparation of this report . In the course of the ...
... prospecting by drilling and other means has been done to determine the extent of the coal beds . The greater part of the information thus obtained was available and has been used in the preparation of this report . In the course of the ...
Sayfa 49
... Prospecting has thus far failed to demonstrate the presence of valuable oil - bearing sands . Coal beds large enough to be worked occur at three horizons or stratigraphic positions in the coal - bearing rocks of Arkansas . These rocks ...
... Prospecting has thus far failed to demonstrate the presence of valuable oil - bearing sands . Coal beds large enough to be worked occur at three horizons or stratigraphic positions in the coal - bearing rocks of Arkansas . These rocks ...
Sayfa 61
... of the outcrop has been determined by prospecting . It is mined again , however , in sec . 32 , T. 5 N. , R. 31 W. , where the 1 bed known as the Mammoth vein is over 8 feet HARTSHORNE COALS . 61 Huntington region...... 61.
... of the outcrop has been determined by prospecting . It is mined again , however , in sec . 32 , T. 5 N. , R. 31 W. , where the 1 bed known as the Mammoth vein is over 8 feet HARTSHORNE COALS . 61 Huntington region...... 61.
Sayfa 62
... prospecting will no doubt develop a large area of coal land worthy of attention in this region also . The varia- tions in the quality of the coal from the different mines of this district is indicated by the analyses in the table on ...
... prospecting will no doubt develop a large area of coal land worthy of attention in this region also . The varia- tions in the quality of the coal from the different mines of this district is indicated by the analyses in the table on ...
Sayfa 65
... prospecting has not shown that the coal is of commercial value . Coal of the Hartshorne horizon is also mined in the Denning and Coal Hill district , from which the coal bed dips southward at a rather low angle toward the Paris syncline ...
... prospecting has not shown that the coal is of commercial value . Coal of the Hartshorne horizon is also mined in the Denning and Coal Hill district , from which the coal bed dips southward at a rather low angle toward the Paris syncline ...
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Sık kullanılan terimler ve kelime öbekleri
Alaska Arkansas auriferous average basin beach beam bed rock bench Bendeleben Mountains boiler efficiency bowlders Cape Nome carbon cent Chickaloon chloritic clay clinker coal bed coal field coastal plain Collier combustion-chamber temperature creek bed curve deposits district ditch Drill hole dry coal east efficiency 72 fault feet thick formation Fort Smith fossils furnace Geological Survey geology granite gravel greenstone Gulch Hartshorne hydrogen inches Kigluaik Kigluaik Mountains Kougarok limestone lower Matanuska Matanuska River material miles mineral mining Mountains mouth Neuropteris Niukluk River Nome group Norton Bay Norton Bay regions Number of tests Ophir Creek outcrop pay streak placer gold Port Clarence pound of combustible pounds of dry probably quartz ratio reconnaissance reported River sample sand sandstone schist Seward Peninsula shaft Shale Shale roof shows slope Spadra stream surface tion tributary U. S. Geol upper valley veins
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