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Books Books 1 - 8 of 8 on I have never found the slightest difficulty in detecting the different divisions....
" I have never found the slightest difficulty in detecting the different divisions at a glance by their lithological characters, but I find it quite impossible to draw any line of separation that will be permanent. Quite marked changes occur in the sediments... "
The Rocky Mountain Directory and Colorado Gazetteer, for 1871: Comprising a ... - Page 68
1870 - 442 pages
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Preliminary Field Report of the United States Geological Survey of Colorado ...

Geology - 1869 - 155 pages
...passes for twenty miles or more through ridge after ridge remarkably well exposed. After emerging from the mountains eastward it runs south for four or five...certainly well shown, with many of its features, but it is a black shale, often arenaceous, containing many layers of sandstone with some concretions; but...
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PRELIMINARY FIELD REPORT OF THE UNITED STATES GEOLOGICAL SURVEY OF COLORADO ...

F. V. HAYDEN - 1869
...upheaved ridges, or unchanged rocks, becomes quite narrow, and continues so to Denver, and even beyond. mountains only from Cheyenne southward, it is very...certainly well shown, with many of its features, but it is a black shale, often arenaceous, containing many layers of sandstone with some concretions; but...
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1st -12th Annual Report of the United States Geological and Geographical ...

Geological and Geographical Survey of the Territories (U.S.) - 1873 - 12 pages
...roof of a house. The valley between the two ridges through which the road runs is a beautiful one. e South of Big Thompson Creek the belt of upheaved ridges,...group of sandstones which are always found between well-defiued cretaceous No. 2 and the jurassic beds as No. 1, or transition. No. 2 is certainly well...
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Annual Report of the United States Geological Survey of the ..., Volumes 1-3

Geological Survey of the Territories (U.S.) - Discoveries in geography - 1873
...Though very few organic remains are observed in them, yet I have never found the slightest difficulty iu detecting the different^ divisions at a glance by...well-defined cretaceous No. 2 and the Jurassic beds as No. 1, or-transition. No. 2 is certainly well shown, with many of its features, but it is a black shale, often...
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Annual Report of the United States Geological and Geographical Survey of the ...

Geological and Geographical Survey of the Territories (U.S.) - Geology - 1873
...direction, from their typical appearance on the Upper Misstruri, the changes are so gradual that 1 have never lost sight of them for a mile, unless concealed...certainly well shown, with many of its features, but it is a black shale, often arenaceous, containing many layers of sandstone with some concretions; but...
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united states geological survey

1873
...every direction, from their typical appearance on the Upper Missouri, the changes are so gradual that 1 have never lost sight of them for a mile, unless concealed...certainly well shown, with many of its features, but it is a black shale, often arenaceous, containing many layers of sandstone with some concretions ;...
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1st -12th Annual Report of the United States Geological and Geographical ...

1874 - 12 pages
...direction, from their typical appearance ou the. Upper Missouri, the changes are so gradual that 1 have never lost sight of them for a mile, unless concealed by more riceut deposits. Again, page 114, in speaking of the Cretaceous in Colorado, he says : At various localities...
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1st -12th Annual Report of the United States Geological and Geographical ...

1874 - 12 pages
...in every direction, from their typical appearance on toe Гррсг Missouri, the changes are но gradual that I have never lost sight of them for a mile, unless concealed by more r<.ceut deposits. Again, page 114, in speaking of the Cretaceous in Colorado, he says : sonri River...
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