Saturday, June 9, at 9:00 a.m.: “Off the Beaten Path” Geology Walk in Thacher Park. Mud, sand, and shells record ancient Albany County history, long before dinosaurs roamed the Earth. Thacher Park’s rocks and fossils record a time of abundant marine life in tropical seas, when New York was about 30 degrees south of the equator. Explore little known parts of Thacher Park and New York’s ancient seas with Dr. Chuck Ver Straeten, New York State Museum. Be prepared for moderately strenuous hiking on and off trail. Call 518 872-0800 to register. Park entrance fee is $6 per vehicle.