3 2 inches 68 10 72 LEFT Micromonolith of Pit 35 17 76 21 80 26 31 37 42 48 51 96 Soil pit 35, Ronelap Island. Dark layers are buried horizons. Fig. 1. Beach Ridge Sand, Rongelap Island. This soil type eccurs on the island beach ridges. The pit shown above is seven feet deep and contains six buried horizons. mak ARM HIV -.