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Contributions, Summer 1981, 20.1

In this issue:

  • Petrography of Upper Cambrian Lodore Formation, Northeast Utah and Northwest Colorado
  • The Draney Limestone; Early Cretaceous lacustrine carbonate deposition in western Wyoming and southeastern Idaho
  • Preliminary report on late Pleistocene vertebrates from the Selby and Dutton archeological/paleontological sites, Yuma County, Colorado
  • Paleosols in the Oligocene of Northwest Nebraska