A revised fortran iv computer program for displaying coal-bearing sedimentary data

A FORTRAN IV computer program for the display of sedimentary borehole data or measured vertical sections for coalfield stratigraphy is described and presented. The output is plotted on a Calcomp plotter and graphically depicts lithologies and sedimentary structures. To the left of these two columns, thickness, elevation, and depth of units are listed together with the nature of the contact between lithologies. The structures column has grain sizes defined by phi scales at the top and bottom of each unit to illustrate vertical changes in grain-size trends. A comments field is to the right of the structures column. Dolerites (igneous intrusives) may be excluded from the graphic log thereby simplifying stratigraphic correlation. The program accepts measurements in either the metric or imperial system, with the latter being converted automatically to metric values. The depth of each lithology can be either the depth to the roof or to the floor of the unit. The program allows for the rapid coding and graphical plotting of borehole or measured vertical sections. The geological data can be plotted at a variety of scales which aids in the presentation of geological data and the correlation of geological units within a coal bearing stratigraphic interval.