Where: Wisconsin · North America · approx. 46.81, -90.82 (vicinity only)
Why this spot: Lake Superior basalt derived agates
What turns up: Lake Superior agates and jasper in shoreline gravel
Access: Open / legal.
Public Lake Superior shoreline; surface hand collecting allowed off protected lands.
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.