Carnegie Institution of Washington Publication No. 207
Carnegie Institution of Washington Publication No. 207
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To quickly assess the difficulty of the text, read a short excerpt:
This problem is worthy of future investigation.
"Insomeplacescertainstrataof the Lykins are very massive, though soft, and por- tions of the formation are locally calcareous, in addition to distinct limestone bands.
"In the absence of paleontological evidence this formation has been usually assigned to Triassic- Jurassic age. It seems quite likely, however, that the base of the Lykins may represent Permian time, as the immediately underlying Lyons is upper Carboniferous. The upper part of the L...ykins is probably Triassic or Jurassic, as it is overlaid by known Jurassic in northern Colorado, though it is possible that part of the Jurassic and Triassic is represented by the general unconformity between the Lykins and the Morrison." • Lee, Jour. Geol., vol. lo, p. 46, 1902.
*» Henderson, First Ann. Report Geological Survey of Colorado, 1908, p. 168.
Digitized by VriOOQ iC 68 THE PERMO-CARBONIFEROUS RED BEDS OP Butters * in 1913 gave a very detailed account of the " Permo-Carbonif er- ous" of the eastern foot-hills of the Rocky Mountains in Colorado.
What to read after Carnegie Institution of Washington Publication No. 207?
You can find similar books in the "Read Also" column, or choose other free books by Carnegie Institution of Washington to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
This problem is worthy of future investigation.
"Insomeplacescertainstrataof the Lykins are very massive, though soft, and por- tions of the formation are locally calcareous, in addition to distinct limestone bands.
"In the absence of paleontological evidence this formation has been usually assigned to Triassic- Jurassic age. It seems quite likely, however, that the base of the Lykins may represent Permian time, as the immediately underlying Lyons is upper Carboniferous. The upper part of the L...ykins is probably Triassic or Jurassic, as it is overlaid by known Jurassic in northern Colorado, though it is possible that part of the Jurassic and Triassic is represented by the general unconformity between the Lykins and the Morrison." • Lee, Jour. Geol., vol. lo, p. 46, 1902.
*» Henderson, First Ann. Report Geological Survey of Colorado, 1908, p. 168.
Digitized by VriOOQ iC 68 THE PERMO-CARBONIFEROUS RED BEDS OP Butters * in 1913 gave a very detailed account of the " Permo-Carbonif er- ous" of the eastern foot-hills of the Rocky Mountains in Colorado.
What to read after Carnegie Institution of Washington Publication No. 207?
You can find similar books in the "Read Also" column, or choose other free books by Carnegie Institution of Washington to read onlineMoreLess
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