Bulletin, 325-329. sayılarU.S. Government Printing Office, 1949 |
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100 sonuçtan 1-5 arası sonuçlar
Sayfa 11
... sand feet of shale , with only occasional sandstone beds interspersed , which has been called the Atoka shale in the southern part of the coal field , but occupies a position equivalent to that of the Winslow formation in the northern ...
... sand feet of shale , with only occasional sandstone beds interspersed , which has been called the Atoka shale in the southern part of the coal field , but occupies a position equivalent to that of the Winslow formation in the northern ...
Sayfa 13
... sand- stones is differentiated from the more shaly parts of the McAlester formation , subdividing it into three members called Spadra shale , Fort Smith formation , and Paris shale , which can be recognized throughout the field . The ...
... sand- stones is differentiated from the more shaly parts of the McAlester formation , subdividing it into three members called Spadra shale , Fort Smith formation , and Paris shale , which can be recognized throughout the field . The ...
Sayfa 14
... sand- stones . Generally the more sandy beds are harder , and where they outcrop form ridges and other prominent topographic features . Although the rocks of this formation have not been investigated in close detail , the observations ...
... sand- stones . Generally the more sandy beds are harder , and where they outcrop form ridges and other prominent topographic features . Although the rocks of this formation have not been investigated in close detail , the observations ...
Sayfa 16
invariably makes a prominent ridge . Locally , however , the sand- stone becomes shaly and in places it may consist of two compara- tively thin sandstone members with sandy shale between , or it may thin out to a single , sandstone less ...
invariably makes a prominent ridge . Locally , however , the sand- stone becomes shaly and in places it may consist of two compara- tively thin sandstone members with sandy shale between , or it may thin out to a single , sandstone less ...
Sayfa 16
... sand , which on weathering out leave cavities . resembling those left by fossil invertebrates . This sandstone is not known to have yielded natural gas or oil , though it has yielded good flows of artesian water at several places ...
... sand , which on weathering out leave cavities . resembling those left by fossil invertebrates . This sandstone is not known to have yielded natural gas or oil , though it has yielded good flows of artesian water at several places ...
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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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