Purgatory Chasm in Newport cuts into one of Rhode Island’s most spectacular rock formations: the Purgatory conglomerate. Come on a seaside excursion to discover the long geologic history of these ancient pebbles, and to discuss slightly more advanced topics such as tectonics and rock deformation. Bring sturdy shoes, a windbreaker, and water. Transport from the RIPTA line 60 stop may be arranged.

Purgatory Chasm, Hanging Rock Road, Newport, RI; May 25, 2013; 10:00 am-12:00 pm; Program Fee: $8/member, $12/non-member; Ages: Adult. Course Number: 164333-203.