 Pieces of Skunnemunk Conglomerate are easy to recognize and have been found in glacial deposits throughout the lower Hudson Valley region.The Roxbury puddingstone is a massive, Ediacaran, clast-supported pebble and cobble conglomerate that occurs within the Brookline Member of the Roxbury Conglomerate that is exposed around Boston, Massachusetts region.This conglomerate is composed of a grey feldspathic sand matrix and well-rounded pebbles and cobbles of quartzite, granite, felsite, and quartz monzonite.