The New International Encyclopædia/New Red Sandstone

NEW RED SANDSTONE. A large series of reddish-colored loams, shales, and sandstones, occurring between the Carboniferous and the Middle Triassic formations, were grouped together under this name, in contradistinction to the Old Red Sandstone group, which lies below the coal measures, and has a similar mineral structure. It has been found, however, that two very distinct periods were included under this name; and the contained fossils of each group were found to be so remarkably different that the one period was referred to the Paleozoic system, under the name of Permian (q.v.). while the other was determined to belong to the Triassic system (q.v.). The name is no longer used in the United States.