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Offered is an original 1932 Geological Map of the San Juan Mountains, Colorado, depicting the region as it appeared during the Late Pleistocene (Wisconsin Glacial Stage) with glaciers restored to their maximum extent. Authored by noted geologists Wallace W. Atwood and Kirtley F. Mather, this large-format scientific map combines topographic detail with glacial and geologic interpretation, making it an outstanding piece of Colorado, USGS, and earth science history.
Printed in Washington, D.C. by Williams & Heintz Co., the map illustrates mountain topography, reconstructed glaciers, glacial lakes, moraines, drainage systems, and geological features throughout the San Juan Mountains of southwestern Colorado.
Features
* Original 1932 edition
* Geologists: Wallace W. Atwood & Kirtley F. Mather
* Geologic reconstruction of the San Juan Mountains
* Wisconsin Glacial Stage restoration
* Scale: 1:250,000
* Contour interval: 200 & 1,000 feet
* Printed by Williams & Heintz Co., Washington, D.C.
Measurements
* Approximately 29.25” x 33.25”
Condition
Original folded government-issued map with expected fold lines from storage. Light age toning consistent with age. Please review all photographs carefully for overall condition and determine suitability for your collection.
An excellent addition for collectors of:
* Colorado history
* Geological Survey maps
* USGS publications
* Mining history
* Glaciology
* Historical cartography
* Scientific ephemera
* Framing and display
This is an original early 20th-century scientific map—not a modern reproduction—and presents beautifully with exceptional detail throughout.
