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Books Books 1 - 2 of 2 on FIEt.II 1. The structural features — that is, folds — are small in area and in....  Take our survey New!
" FIEt.II 1. The structural features — that is, folds — are small in area and in magnitude. The crests of many of the domes and anticlines are not more than 20 or 30 feet high. Ist.drill hole FIG. 12. Diagram showing conditions governing oil accumulations... "
Oil Investigations in Illinois in 1914: Area South of the Colmar Oil Field ... - Page 27
by Illinois State Geological Survey, William Clifford Morse - 1915 - 111 pages
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Reports and Papers, Volume 25

Geology - 1916
...sand lenses, oil has not always been found. The rocks in this field show dome structure; the domes are small in area and in magnitude, the crests of many of them being not more than twenty to thirty feet high. In this area the best advice that the Illinois...
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Bulletin, Issue 31

Geology - 1915 - 111 pages
...entirely different from those better known heretofore. 1. The structural features—that is, folds—are small in area and in magnitude. The crests of many...are not more than 20 or 30 feet high. Ist.drill hole Fie. 12. Diagram showing conditions governing oil accumulations: A. In oil sands saturated with salt...
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