This beautiful, geological formation map listing all the soil, rock, sand, gravel, and more of the state of Maryland. Published in 1933 by the Maryland Geological Survey, this map gives great detail and the color is beautiful and bold. Just a few of the categories on the legend include formations of Quaternary, Cretaceous, Triassic, Igneous, and others. This map would look beautiful matted and framed for any Maryland fan or a great educational map for geological study because of the various formations included.