The word caliche has been used for many years in the southwestern part of our country to designate the layer of calcareous material which lies just below the surface over wide areas in New Mexico, Arizona, Texas and Oklahoma. This material is essentially n impure limestone, one to twenty feet thick, buff to white in color, showing in places a fine horizontal lamination. Many local names, such as marl, rim rock, gyp, indurated clay, and caprock have been used in connection with it but because of the general use of the term caliche in the southwest, where the material is so abundant, it is hoped that this name will be generally adopted.
Proceedings of the Iowa Academy of Science
©1925 Iowa Academy of Science, Inc.
Lonsdale, John T.
"The Occurrence of Caliche in Oklahoma,"
Proceedings of the Iowa Academy of Science, 32(1), 357-357.
Available at: https://scholarworks.uni.edu/pias/vol32/iss1/62