Where: East · North America · approx. 40.5, -76.5 (vicinity only)
Why this spot: Ordovician trilobites, brachiopods
What turns up: The Swatara Gap Ordovician shale is a well-known Pennsylvania trilobite locality on public ground.
Access: Open / legal.
Open public collecting under BLM or public-land casual-use rules: reasonable personal amounts, hand tools, no claim-jumping, no resale. Confirm current status before you go.
Open in Mudlark Map →
Satellite view, historic-map overlays, tide/flow context and field notes are in the app. Exact research detail is part of Pro.
Pins are approximate by design. This page is historical research, not permission to dig. Check ownership and local law first.