Samples of coral, limestone showing mineral alteration and a volcanic rock with alteration halo and calcite crystals |
The Rolling Stones July field trip was relatively close to home and we had a very nice crowd participating including some young pebble pups. It was nice to have kids along on the trip having fun collecting rocks. As one of our sage members observed during the trip the kids have a distinct advantage in rock collecting since they are closer to the ground. There is definitely something to that along with keen eyes and abundant enthusiasm.
Field Trip Participants |
Saturday hosted a clear blue New Mexico sky as we all gathered at Walmart at 8 am. Right on schedule the car-a-van lined up and headed east for the Georgetown area. Our collecting locales were in the Devonian/Mississippian limestones.
It was a short ride over to our first stop just off the Georgetown Road. We searched the area for limestone garden rocks. In this spot there were some outcrops of lovely, weathered limestone blocks, but many were too big to handle on this trip. Next stop was similar except the hillside also hosted some beautiful cacti some of which George collected for his cacti garden. The limestones in this area were fossiliferous too.
Samples from the Prospect pit--the top rock is gossan on limestone, dendrites on clay and examples of bands of alteration |
Silicified corals |
Our last official stop was near the old Georgetown townsite. Down in the stream valley folks were finding some brachiopods and crinoids. I was farther up the hill and found lots of old glass and square nails. Ansel went off to check on another collecting area, but the day was hot and everyone was tiring. Everyone opted out and headed back to town to look over their new found treasures.
Field Trip Participants |