| addressed, that he would like to visit the Gates-Adah kimberlite dikes sometime (Figure 1). Unbeknownst to Smith...Smith, Mac was also interested in the GatesAdah kimberlite dikes and, in particular, in the composition...about to leave for a memorial service in West Virginia for Vinton E. Gwinn. Gwinn, a young, highly respected...of chryso- 2 Figure 1. General locations of kimberlite dikes in southwestern Pennsylvania. The pyrope...soon paid off when Smith found loose, weathered kimberlite rocks. After an hour or two, he traced them to |
Mt. Horeb kimberlite, Rockbridge County, Virginia, USA