Standing at the base of the 20-foot-high glacial erratic in Rockefeller State Park Preserve, one can’t help to notice the sweeping grey, blue, and brown striations that wind their way around this boulder’s 65-foot circumference; often interrupted by jagged edges and deep gouges. A glacial erratic is a rock that has been transported by a glacier, and are sometimes used to track glacial movement. This giant piece of gneiss, which is estimated to be more than 600 million-years-old, didn’t always stand among the aged trees of the park. It was…
