Dept. of Phy. Sci., Kutztown Uni. Kutztown, PA 19530. The cylindrical ichnofossil Skolithos is ubiquitous in Lower Cambrian strandline deposits, often existing in high densities that obliterate primary structures and make it difficult to identify sequence boundaries. For a uniform distribution variance remains low and constant as quadrant size or distance increases along a transect.
Random distributions show random variances.
Clumped distributions display a marked peak in variance corresponding to the size or distance between clumps. The two transects on the sequence boundary are similar to shoreface deposits above the sequence boundary, but with a slightly higher than average variance.