Case Hardening of Sandstone

James L Conca, George R. Rossman

 Division of Geological and Planetary Sciences
California Institute of Technoogy
Pasadena, CA  91125


The case-hardened cryst developed on the Aztec Sandstone in the Valley of Fire, Nevada, has been characterized by a variety of techniques, including electron microscopy and infrared spectroscopy. The case-hardened cryst consists mainly of host rock, with a fine-grained cement and wind-deposited kaolinite. The cement is usually calcite, but in some cases the hydrated calcium borate, colemanite, was found to be the case-hardening cement.

last updated: 3-Sep-2017