Where: South Dakota · North America · approx. 43.75, -103.7 (vicinity only)
Why this spot: Mississippian Pahasapa Limestone agate
What turns up: Teepee Canyon agate with tight red and orange fortification bands
Access: Gray area.
Some road cuts are in the Black Hills National Forest (hobby collecting allowed); adjacent claims and private land are off limits.
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.