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Contributions, Summer 1974, 13.1

In this issue:

  • Middle Eocene rodents (Mammalia) from southwestern Wyoming
  • Wyoming specimens of the trace fossil Bergaueria
  • Infrared detection of kimberlitic diatremes in northern Colorado and southern Wyoming
  • Notes on some early Eocene anaptomorphine primates
  • Soil development on Wisconsin moraines of the Libby Creek area, Medicine Bow Mountains, Wyoming
  • Karst of western Wyoming; an alpine karst in Tosi Creek basin, Gros Ventre Mountains