Image from page 22 of "Geology and water resources of a portion of the Missouri river valley in northeastern Nebraska" (1908)
Identifier: geologywaterreso00cond
Title: Geology and water resources of a portion of the Missouri river valley in northeastern Nebraska
Authors: Condra, Geo. E. (George Evert), 1869-1958
Subjects: Geology Water-supply
Publisher: Washington, Govt. Print. Off.
Contributing Library: The Library of Congress
Digitizing Sponsor: The Library of Congress
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fumes, and even to cause slight baking of the shale. Two zones of concretions of carbonate of lime occur in the Carlileshale. The lower zone is a continuous one, and its concretions arelarge, lens-shaped forms, 2 to 8 feet long and 1 foot or more thick(PI. V, ^). This horizon continues at about 50 feet from the top ofthe formation from high in the slope in sec. 32. T. 32. R. 5 E., to apoint between St. James and St. Helena, where the dip takes itdown to the level of the Missouri. The upper zone consists of smallerconcretions at a less continuous horizon 8 to 10 feet above the first.These concretions weather out and fall to the base of a sloj^e, wherethey * crack into irregular pieces. In many of them calcite andselenite crystals occur. While selenite crystals may be observed throughout the Graneros,Carlile, Niobrara, and Pierre, they are most abundant on slopes ofthe Carlile formation, especially at the Ionia Volcano or on other U. S. GEOLOGICAL SURVFV WATER-SUPPLY PAPfR NO. 215 PL. V
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.1. CARLILE SHALE OVERLAIN BY NIOBRARA NORTHEAST OF JAMES, NEBR.
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Image from page 22 of "Geology and water resources of a portion of the Missouri river valley in northeastern Nebraska" (1908)
Identifier: geologywaterreso00cond
Title: Geology and water resources of a portion of the Missouri river valley in northeastern Nebraska
Authors: Condra, Geo. E. (George Evert), 1869-1958
Subjects: Geology Water-supply
Publisher: Washington, Govt. Print. Off.
Contributing Library: The Library of Congress
Digitizing Sponsor: The Library of Congress
View Book Page: Book Viewer
About This Book: Catalog Entry
View All Images: All Images From Book
Click here to view book online to see this illustration in context in a browseable online version of this book.
Text Appearing Before Image:
fumes, and even to cause slight baking of the shale. Two zones of concretions of carbonate of lime occur in the Carlileshale. The lower zone is a continuous one, and its concretions arelarge, lens-shaped forms, 2 to 8 feet long and 1 foot or more thick(PI. V, ^). This horizon continues at about 50 feet from the top ofthe formation from high in the slope in sec. 32. T. 32. R. 5 E., to apoint between St. James and St. Helena, where the dip takes itdown to the level of the Missouri. The upper zone consists of smallerconcretions at a less continuous horizon 8 to 10 feet above the first.These concretions weather out and fall to the base of a sloj^e, wherethey * crack into irregular pieces. In many of them calcite andselenite crystals occur. While selenite crystals may be observed throughout the Graneros,Carlile, Niobrara, and Pierre, they are most abundant on slopes ofthe Carlile formation, especially at the Ionia Volcano or on other U. S. GEOLOGICAL SURVFV WATER-SUPPLY PAPfR NO. 215 PL. V
Text Appearing After Image:
.1. CARLILE SHALE OVERLAIN BY NIOBRARA NORTHEAST OF JAMES, NEBR.
Note About Images
Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.