Exploring Geology at the Huyck Preserve. 10 a.m. The rocks of Rensselaerville record local history from long before dinosaurs. Explore the local geology and deep-time history on a walk along the falls with Dr. Charles Ver Straeten of the New York State Museum. Semi-rugged walk; sturdy footwear required. Cost of event: Huyck Preserve members, free. Non-members, $5. Registration required: