Plate 14. A large solution pipe in Mescalero caliche, at least 12.75 feet in diameter, 110 inches deep, floored by Dewey Lake Redbeds, in section 30. Where the caliche hardpan drops off, siltstone fragments of the Dewey Lake Redbeds are exposed in the trench floor; water soaks in rapidly when poured on this exposure. The Dewey Lake Redbeds are overlain by an exposure of soft, powdery calcareous dissolution residue, 36 inches thick and 31 inches long. (Photo by Robert Aly)