![29.2 Polymict pebble conglomerate. Stillwater Cove Regional Park, Sonoma County, California. This conglomerate is characterized by abundant igneous rock clasts (such as the light granitoid clast in the upper left between the two black clasts and the fairly round, cream colored granitoic clast in the center of the field of view) and quartz, but the conglomerate also contains limestone, volcanic rock, and metamorphic rock clasts. The matrix is muddy sand. [The scale is the standard GSA scale with mm and inch divisions.]](../29.2.JPG)
29.2 Polymict pebble conglomerate. Stillwater Cove Regional Park, Sonoma County, California. This conglomerate is characterized by abundant igneous rock clasts (such as the light granitoid clast in the upper left between the two black clasts and the fairly round, cream colored granitoic clast in the center of the field of view) and quartz, but the conglomerate also contains limestone, volcanic rock, and metamorphic rock clasts. The matrix is muddy sand. [The scale is the standard GSA scale with mm and inch divisions.]