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Excerpt from Niagaran Reefs and Oil Accumulation in the Dewitt-McLean County Area, IllinoisThe report area is at the northern end ofthe Illinois Basin. Four-fifths of the area lies west of the steepest dips along the western flank of the lasalle Anti clinal Belt. In the basin rock strata dip regionally southeastward to southward at an avera rate of approximately 25 feet per mile. The glacial drift thickness varies from 0 to 400 feet but is 200...

Excerpt from Wapella East Oil Pool, Dewitt County, Illinois: A Silurian ReefA geologic study of the area shows the Wapella East pool to be situated on a broad, -southward - plunging, structural nose. There is about 100 feet of closure in the pool area. How much Of this closure can be attributed to the presence Of Silurian reef is conjectural and will remain so until a hole that has penetrated the reef is drilled through the entire Sil urian. I...

Excerpt from Oil and Gas in the Adams-Brown-Schuyler County Area, IllinoisSalem Limestone The Salem Limestone is browner, sandier, and more dolomitic than the St. Louis and varies in thickness from 10 to 40 feet.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technol...

Excerpt from Oil and Gas in the Adams-Brown-Schuyler County Area, IllinoisSalem Limestone The Salem Limestone is browner, sandier, and more dolomitic than the St. Louis and varies in thickness from 10 to 40 feet.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technol...