File:Annual report of the United States Geological Survey to the Secretary of the Interior (1899) (14576769019).jpg

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Identifier: annualreportofun2171geol (find matches)
Title: Annual report of the United States Geological Survey to the Secretary of the Interior
Year: 1880 (1880s)
Authors: Geological Survey (U.S.)
Subjects: Geological Survey (U.S.) Geology Water-supply Forest reserves Mines and mineral resources
Publisher: Washington : G.P.O.
Contributing Library: University of Illinois Urbana-Champaign
Digitizing Sponsor: University of Illinois Urbana-Champaign

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dng the stratigraphic and paleontologic sequence alonglines of typical cross sections from Arkansas to the Rio Grande andmapping the areal extent of the formations, but he has not been ableto carry on the work continuously. Furthermore, large parts of theregion are not yet topographically surveyed. Thus it will be seen that the classification of the Cretaceous forma-tions of Texas has been a subject of evolution. From time to timepreliminary papers have been presented, but with no pretense tofinality. The writer can not here detail the labors winch he hasdevoted to the amplification of the early section and to tracing thevariations of the Comanche series throughout the vast areas in which 1 Trans. Acad. Sci., St. Louis, Vol. I, pp. 582-589, 1856-1860. 2 Am. Jour. Sci., 3d series, Vol. XXXI, April, 1886.
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,-nois HILL.) HISTORY OF CRETACEOUS NOMENCLATURE. 117 it is now known to occur. He may simpty state that he has studiednearly every known locality where, from the early writings, he sus-pected that the Comanche series might occur: (1) The Plains of theKiamitia of Morton; (2) the Preston, Fort Washita, and other RedRiver localities of G. G. Shumard, whose collections were describedby Marcou; (3) the Fredericksburg locality of Roemer, and the Austinand Comanche Peak localities of B. F. Shumard; (4) the New Mexican(Tucumcari) region of Marcou, and, finally, (5) the outlying areas ofKansas which had been mentioned by Hay, Cragin, and others. He hasreconnoitered and traced these formations through hundreds of milesof intermediate areas, from Arkansas on the northeast to El Pasoand far into Mexico to the southwest, and has mapped and minutelystudied many localities. He has also studied the collections of rocksand fossils preserved in the museums of Amherst, Philadelphia, Cam-bridge, New Hav

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https://www.flickr.com/photos/internetarchivebookimages/14576769019/

Author Geological Survey (U.S.)
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Volume
InfoField
1899
Flickr tags
InfoField
  • bookid:annualreportofun2171geol
  • bookyear:1880
  • bookdecade:1880
  • bookcentury:1800
  • bookauthor:Geological_Survey__U_S__
  • booksubject:Geological_Survey__U_S__
  • booksubject:Geology
  • booksubject:Water_supply
  • booksubject:Forest_reserves
  • booksubject:Mines_and_mineral_resources
  • bookpublisher:Washington___G_P_O_
  • bookcontributor:University_of_Illinois_Urbana_Champaign
  • booksponsor:University_of_Illinois_Urbana_Champaign
  • bookleafnumber:162
  • bookcollection:university_of_illinois_urbana-champaign
  • bookcollection:americana
  • BHL Collection
Flickr posted date
InfoField
28 July 2014



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