Preliminary Field Report of the United States Geological Survey of Colorado And
Preliminary Field Report of the United States Geological Survey of Colorado And
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In our eReader you can find the full English version of the book. Read Preliminary Field Report of the United States Geological Survey of Colorado And Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book Preliminary Field Report of the United States Geological Survey of Colorado And
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1, which, at the foot of the mountains, are cut through by the numerous little branches in a most picturesque manner. The little streams run through vertical walls eighty to one hundred feet high, forming most interesting canons, and revealing all the peculiarities of structure of this sandstone. Some of it is coarse and friable, other portions are compact silicious rocks; others, a pebbly conglomerate. All the illustrations of irregular layers of deposition, ripple or wave markings peculiar to... sandstones, are found here; also, admirable examples of slickensides. The jointage, which is very marked, is vertical, at right angles to the lines of stratification, and most essentially assists atmospheric agencies in wearing it away, so that the sides of the walls are often very rugged, and immense cubical blocks have fallen down by the water's side.
The diiferent formations all along the flanks of the mountains are exposed by the upheaval of the mountains, and lie in belts or zones, w r hich are sometimes concealed for a distance by recent tertiary deposits or by debris; or they are narrow or wide at diiferent points, and their conditions are only to be determined by personal inspection.
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You can find similar books in the "Read Also" column, or choose other free books by F V Ferdinand Vandeveer Hayden to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
1, which, at the foot of the mountains, are cut through by the numerous little branches in a most picturesque manner. The little streams run through vertical walls eighty to one hundred feet high, forming most interesting canons, and revealing all the peculiarities of structure of this sandstone. Some of it is coarse and friable, other portions are compact silicious rocks; others, a pebbly conglomerate. All the illustrations of irregular layers of deposition, ripple or wave markings peculiar to... sandstones, are found here; also, admirable examples of slickensides. The jointage, which is very marked, is vertical, at right angles to the lines of stratification, and most essentially assists atmospheric agencies in wearing it away, so that the sides of the walls are often very rugged, and immense cubical blocks have fallen down by the water's side.
The diiferent formations all along the flanks of the mountains are exposed by the upheaval of the mountains, and lie in belts or zones, w r hich are sometimes concealed for a distance by recent tertiary deposits or by debris; or they are narrow or wide at diiferent points, and their conditions are only to be determined by personal inspection.
What to read after Preliminary Field Report of the United States Geological Survey of Colorado And?
You can find similar books in the "Read Also" column, or choose other free books by F V Ferdinand Vandeveer Hayden to read onlineMoreLess
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