 The Schunemunk puddingstone, which is exposed extensively on Bearfort Mountain, Boonton, Rockaway Township and Schunemunk Mountain, is a conglomerate that is part of a thick geologic formation formally known as the Skunnemunk Conglomerate.This puddingstone is a distinctive, Late Devonian, grayish-purple to grayish-red, thin to very thick-bedded, cross–bedded, conglomerate.Within the Skunnemunk Conglomerate, it is interbedded with grayish-purple to grayish-red sandstone, thin-bedded, medium-gray sandstone, and greenish-gray and grayish-red shale with mudcracks.