PC99 is a Windows-based, Visual Basic freeware program that facilities the graphical presentation and/or comparison of individual or composite palaeocurrent data files. Such data may be displayed using either rose or circular diagrams. Interpretation of palaeocurrent patterns within rose diagrams is aided by a choice of petal width and radial scale. Examples of the program's utility are presented using data derived from well preserved Early Permian point bars, Member C, Weller Coal Measures, Allan Hills, Antarctica. (C) 2000 Elsevier Science B.V. All rights reserved.
- Rose diagram