Bulletin, 325-329. sayılarU.S. Government Printing Office, 1949 |
Kitabın içinden
100 sonuçtan 1-5 arası sonuçlar
Sayfa 53
... field . The photometric com- parison is made by adjusting to equal brightness both halves of the telescopic field by means of a polarizing arrangement . One of the advantages of the optical pyrometer is that it is more apt to take the ...
... field . The photometric com- parison is made by adjusting to equal brightness both halves of the telescopic field by means of a polarizing arrangement . One of the advantages of the optical pyrometer is that it is more apt to take the ...
Sayfa iii
... field Maps of the coal field .... Commercial relations Page . 1 1 2 Towns and villages . Drainage ... Topographic provinces .. General geology 9 10 Stratigraphy General description and correlation .. Atoka formation Hartshorne sandstone ...
... field Maps of the coal field .... Commercial relations Page . 1 1 2 Towns and villages . Drainage ... Topographic provinces .. General geology 9 10 Stratigraphy General description and correlation .. Atoka formation Hartshorne sandstone ...
Sayfa vi
... field 20 106 In pocket . FIG . 1. Map showing geographic position and railroad connection of the Arkansas coal field ...... 2. Outline map of Arkansas coal field , showing mining centers , rail- roads , settlements , etc .... 3. Graphic ...
... field 20 106 In pocket . FIG . 1. Map showing geographic position and railroad connection of the Arkansas coal field ...... 2. Outline map of Arkansas coal field , showing mining centers , rail- roads , settlements , etc .... 3. Graphic ...
Sayfa 1
THE ARKANSAS COAL FIELD . By ARTHUR J. COLLIER . INTRODUCTION . Need of investigation . - Both the Carboniferous and the Tertiary rocks of Arkansas contain extensive deposits of coal , but only those of the older system in a field ...
THE ARKANSAS COAL FIELD . By ARTHUR J. COLLIER . INTRODUCTION . Need of investigation . - Both the Carboniferous and the Tertiary rocks of Arkansas contain extensive deposits of coal , but only those of the older system in a field ...
Sayfa 2
... field season . Much of the accuracy of this report is due to the faithful work of these geologists . Mr. M. R. Campbell , geologist in charge of economic geology of fuels , spent two weeks with the party in the field , making many ...
... field season . Much of the accuracy of this report is due to the faithful work of these geologists . Mr. M. R. Campbell , geologist in charge of economic geology of fuels , spent two weeks with the party in the field , making many ...
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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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