There are different kinds (not scientific kinds) of rocks I find on our bit of shore on Massachusetts Bay. There are the dramatic igneous striations of granite shot through with black basalt seams; then there’s purer pink granite at the old quarry; and then the small granite pebbles tumbled smooth at Wattles beach; and last the Quixotic jumble of whatever rocks that form the riprap of the back sea wall. And too, it’s about the things like algae and other tiny forms of life that like to make the rocks their homes. But mostly, of course, rocks are exceptionally valuable “plastic material” for my “expressive purposes”. Next year I’m going to work on the beach pebbles and the quarry.