Enter a coordinate or use your GPS to see the geology maps that cover it, the redrawn geology at that spot, and its gold potential: host rocks, reefs, structures, pathfinder minerals and old workings.
Examples (Arc 1950, read off the maps):
Map at this spot
Background:
Scroll, pinch or use + / − to zoom; drag to pan; click to move the point.
Legend
Sheet index
Click anywhere to pick a point
Background:
Grid:
. Gold diamonds are major historical gold mines (positions approximate); smaller gold dots are old mines from the maps and appear as you zoom in, along with the detailed redrawn geology of each area. Drag to move, scroll, pinch or double-click to zoom, click to look up a point. Satellite imagery: Esri World Imagery (WGS 84); outlines and grid are shifted from Arc 1950 to line up with it.
1×Drag with the hand to move · scroll, pinch or double-click to zoom
How the potential is worked out
Where it occurs
Dots are old mines, workings and mineral symbols, placed where they are printed on your map sheets (or, where the sheet has no label, at the recorded farm — approximate). Pathfinder tags are read automatically, so check in the field before relying on one.
Field rock check: what rock am I on?
Use your GPS or look up a point
Ask AI: geology of this area
Ask AI tells you the geology of the area around the point and what it means for gold: host rocks, reefs, structures, pathfinder minerals, old workings and grades. It draws on the geological survey descriptions and the map close-ups. Included in Premium (up to 25 questions a day).
What the geological reports say
Search the report text
Searches the scanned text of all the geological reports. Old scans contain some reading errors.