Geological map of Delaware County…1882.
[Part of] Second Geological Survey of Pennsylvania.
Report of progress C5. Part 1. Field Notes in Delaware County,
by C. [Charles] E. Hall, with a colored geological map of the county,
and thirty-nine photographic pictures of the granite quarries, the kaolin mines,
the serpentine outcrops, and the castle rocks, published in advance of the Geological Report on Delaware County, part 2, by J. P. Lesley.

LINK TO PDF, 10.3 mb

This report was in poor condition, and scanning the map was a way of preserving it and making it accessible. At some point in the future, I hope to
scan the subtly colored "photographic pictures" mentioned in the title and
attach them here as well.

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Page last modified November 15, 2010

The History of Philadelphia's Watersheds and Sewers

Compiled by Adam Levine
Historical Consultant
Philadelphia Water Department
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