After leaving the Blanchard Rock Shop in Bingham, I went by the San Marcial Quarry. This quarry, which was a road department quarry, can be seen from I-25. It is reached by exiting the highway at the San Marcial exit (exit 124) and driving east through the first intersection. The entrance to the quarry is on the right. It is closed off by a chain across the drive, as can be seen in the picture. I didn’t walk up the drive to the quarry itself, but picked up some loose rock near the road that appeared to have vugs. Many months later, when I got around to breaking up the rocks, I noted that there were three types: a black granular rock that had nothing of interest, a fairly “fresh” looking vesicular basalt that had little of interest, and a weathered vesicular basalt. In these, the vesicles were loaded with Mordenite (#1028), along with quite a few nice orange crystals of Magnesiohornblende (#917), and some Magnetite and a mica which I believe is Phlogopite.
Also reported from this locality are Titanite, Tridymite, Hematite and Carnotite, but I didn’t find any.