Surveyed in 1960 by Kittatinny Grotto and Northern New Jersey Grotto, the map shows rooms and different levels of the cave. It also features two insets: a regional geologic map and a geologic map of the Leigh Cave area. Kittatinny limestone is featured on the map as well as precambrian gneiss. Two cross-sections also are included on the map. 63.5 x 73.7 cm