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Books Books 1 - 3 of 3 on ... between the Black Buttes and the Black Rock coal groups, probably extending around....
" ... between the Black Buttes and the Black Rock coal groups, probably extending around the dome in a belt that is somewhat concentric with those of the other groups. The Black Rock coal group lies unconformably upon the Black Buttes and older coal groups... "
Contributions to Economic Geology, 1908: Mineral fuels - Page 219
by Marius Robinson Campbell - 1910 - 559 pages
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Bulletin - United States Geological Survey, Issue 341

Geological Survey (U.S.) - Geology - 1909
...the field and occupies a large portion of the Great Divide Basin. The same group contains the coals in the low synclinal trough between the Rock Springs dome and the Rawlins anticline. For the eastern boundary of this coal zone the reader is referred to the reports on the Great Divide...
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Congressional Serial Set

United States - 1909
...the field and occupies a large portion of the Great Divide Basin. The same group contains the coals in the low synclinal trough between the Rock Springs dome and the Rawlins anticline. For the eastern boundary of this coal zone the reader is referred to the reports on the Great Divide...
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Bulletin - United States Geological Survey, Issue 381, Part 2

Geological Survey (U.S.) - Geology - 1910
...unconformably upon the Black Buttes and older coal groups and like them outcrops around the dome more or less concentrically with the others. In places this group...trough between the Rock Springs dome and the Rawlins anticline.0 FAULTS. The general dome or anticlinal structure is somewhat complicated by many normal...
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