Where: Montana · North America · approx. 46.93, -110.73 (vicinity only)
Why this spot: Precambrian
What turns up: Agate, quartz
Access: Gray area.
Lewis and Clark NF and claims; verify.
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.