Halcottsville — Geology professor Robert Titus, of Hartwick College and Kaatskill Life magazine, will be leading a visit to Dry Brook to explore the creek’s Ice Age history and its record of flood events on Saturday, July 10. The program begins at 9 a.m. at the Pakatakan Farmers’ Market on Route 30, Halcottsville and the tour departs at 10 a.m.