Where: Canada · North America · approx. 45.05, -77.88 (vicinity only)
Why this spot: Rockhounding locality: Grenville nepheline syenite
What turns up: Sodalite, nepheline, feldspar
Access: Permission required.
MacDonald Mine north of Bancroft is a now-closed site on patented land; collectors ask locally/obtain permission before entry.
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.