USGS

Cleavage in metabasalt of Catoctin Formation
Figure 16. First-generation axial planar cleavage (Sc) cut by crenulation cleavage (Scc) in metabasalt of the Catoctin Formation near Loudoun Heights Trail on Blue Ridge. A, Stick is 1 m long. B, Rock hammer handle is 15 cm long.
U.S. Geological Survey, U.S. Department of the Interior
This page is https://pubs.usgs.gov/bulletin/b2123/figure16.html
Contact: Scott Southworth
Last modified 08.29.00