Antique 1870s G.W. Gray & Son Geological Map of Maryland & Delaware (32 x 20")"

Antique 1870s G.W. Gray & Son Geological Map of Maryland & Delaware (32 x 20")"

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This highly detailed 32" x 20" antique map, titled "Map of Maryland & Delaware," is specifically a geological map of the region, as indicated by the distinct colored areas and accompanying legends typically found on such maps from the period. It was published by G.W. Gray & Son, a prominent Philadelphia-based firm established in the late 1860s. Renowned for producing one of the most successful atlases ("Gray's National Atlas") and for being "one of the last to employ hand coloring on maps," their meticulous detail is evident here. Likely dating from the 1870s, this map provides a fascinating historical snapshot of the geological understanding of Maryland and Delaware, including various rock formations and geographical features. It offers valuable insights into the scientific cartography of the era. An excellent find for collectors of antique scientific maps, geological history enthusiasts, or as a distinctive decorative piece.