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Publication Extents

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Uranium in the Cochetopa District, Colorado, in relation to the Oligocene erosion surface
Jerry Chipman Olson
1976, Open-File Report 76-222
In the Cochetopa district, Colorado, the sequence of Mesozoic and Cenozoic events is as follows: development of a relatively smooth, planar erosion surface in Jurassic time; deposition, on this surface, of the Junction Creek Sandstone and Morrison Formation of Jurassic age, followed by deposition of the Dakota Sandstone and Mancos...
Salt-water encroachment in aquifers near the Houston Ship Channel, Texas
Donald G. Jorgensen
1976, Open-File Report 76-781
Interpretations based on analyses of inorganic constituents, dissolved organic carbon, and tritium in ground water and surface waters indicate that the Houston Ship Channel is the source of salt water that has been detected in shallow wells between Baytown and Houston, Texas. Analyses of the ratios of the stable isotopes...