PETCAL: A BASIC language computer program for petrologic calculations, by Edward C. Bingler, Dennis T. Trexler, Wayne R. Kemp, and Harold F. Bonham, Jr, 1976.

An easy-to-use computer program designated PETCAL (PETrologic CALculations) that computes a number of chemical and normative ratios and indices from a standard oxide rock or mineral chemical analysis and computes the CIPW norm; appendices give sample outputs, flow charts, and program printouts; references.

Also available on disk. An updated version is in OF88-3.

Report 28, 27 pages, 11x8.5", 2 b/w drawings, 5 appendices, $3.00