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Pennsylvania
Monongahela bars below Pittsburgh glass district
Riverbank Inferred from historyGray area
What you could find
Reported finds from this ground.
Sea potteryPhotos via Wikimedia Commons: NPS (Public domain).
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Why this spot
Biggest US glassmaking center of the 19th c; glasshouse waste went straight in
Inference; river is pooled by dams so exposure windows are rare.
Before you go
Hazards noted for this site.
Industrial sediment.
Keep exploring nearby
More spots in this area.