FORTRAN IV Program for Construction of PI Diagrams with the Univac 1108 Computer

Abstract

Graphic analysis of fabric data by constructing orientation diagrams is a standard method in structural geology. Turner and Weiss (1963) and Whitten (1966) among others, present methods of constructing the diagrams. This paper describes a computer program, written in FORTRAN IV for the Univac 1108, for constructing the orientation diagrams. The program also has been run on IBM 7040, 7094, 360/40, 360/65, and 360/67 computers.

The program is listed in Appendix II and details of the input deck are given in Appendix I. Samples of input and output are presented in Appendix III.

I wish to thank Drs. C. Klein, D. R. Waldbaum, and M. P. Billings for helpful discussions during writing of the program. Computer funds were provided by Dr. C. Klein through NSF grant 2723 to Harvard University, the Manned Spacecraft Center of NASA, the Maine Geological Survey, Dr. P. Fenner and Dr. P. Butler of the University of Pennsylvania, and the Geology Department of Franklin and Marshall College.