The plot summarizes the mineralogy in a drill hole from the C-14 pipe, Buffalo Hills, Alberta, Canada. In the upper reaches of a pipe, the clays and chlorites will tend to dominate along with possibly calcite. The presence of serpentine can mark an altered, but unweathered zone.

Drill hole C-14E shows the most alteration and drill hole C-14K the least. The plots are made to show distribution with depth.