This trip begins with a visit to the petroglyphs in Caldera followed by a study of the pyroclastic flows in Gualaca Park which went down a stream bed into the Pacific Ocean - a very unusual event. The trip will involve a moderate amount of walking. There is no charge but preregistration is essential. To register email: welthyh@gmail and specify names of participants and whether you have a car. More information will be forwarded upon registration. The trip is under the supervision of Dr. Paul Myers, emeritus professor of Geology at the University of Wisconsin, Eau Claire.
