The second half of the 19th century was the peak of anthracite coal mining in Pennsylvania. This 1866 map illustrates the geology of the region, and uses two modern techniques to visualize minerals below ground. A columnar vertical section, seen here along the left edge of the map, represents the makeup of the earth’s crust at a specific place, in this case, Pottsville, Pennsylvania. A transverse view, or, cross section, illustrated along the bottom of the map, shows rock formations between two geographic locations. These visual aids first appeared on maps in the early-19th century, when mapmakers attempted to illustrate Earth’s substructures.
Relief shown by hachures.
Oriented with north to the upper right.
"Entered according to Act of Congress by Benjamin Bannan in the Clerks office of the District Court of the Eastern District of Pennsylvania."
Map removed from: Coal, iron, and oil : or, The practical American miner. A plain and popular work on our mines and mineral resources, and a text-book or guide to their economical development / By Samuel Harries Daddow ... and Benjamin Bannan. Pottsville, Pa. : B. Bannan ; Philadelphia, Pa. ; J.B. Lippincott & Co., 1866. (786, 801-808 pages : illustrations, maps ; 24 cm).
Includes 2 vertical sections, 2 transverse sections, and names and locations of collieries.
Notes (date):
This date is inferred.
Notes (exhibitions):
Exhibited: "Beneath Our Feet: Mapping the World Below" organized by the Norman B. Leventhal Map Center at the Boston Public Library, 2017-2018.
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