Wikimedi'Òc

Quartzite & jasper-quartz pebble conglomerate (Lorrain Formation, Paleoproterozoic, ~2.3 Ga; Ottertail Lake Northeast roadcut, near Bruce Mines, Ontario, Canada) 1 (47656723102).jpg - Ser Amantio di Nicolao

Quartzite & jasper-quartz pebble conglomerate (Lorrain Formation, Paleoproterozoic, ~2.3 Ga; Ottertail Lake Northeast roadcut, near Bruce Mines, Ontario, Canada) 2 (46793624825).jpg - Ser Amantio di Nicolao

Quartzite & jasper-quartz pebble conglomerate (Lorrain Formation, Paleoproterozoic, ~2.3 Ga; Ottertail Lake Northeast roadcut, near Bruce Mines, Ontario, Canada) 3 (46793606025).jpg - Ser Amantio di Nicolao

Quartzite & jasper-quartz pebble conglomerate (Lorrain Formation, Paleoproterozoic, ~2.3 Ga; Ottertail Lake Northeast roadcut, near Bruce Mines, Ontario, Canada) 4 (47656698412).jpg - Ser Amantio di Nicolao

Quartzite & jasper-quartz pebble conglomerate (Lorrain Formation, Paleoproterozoic, ~2.3 Ga; Ottertail Lake Northeast roadcut, near Bruce Mines, Ontario, Canada) 5 (47709715051).jpg - Ser Amantio di Nicolao

Quartzite & jasper-quartz pebble conglomerate (Lorrain Formation, Paleoproterozoic, ~2.3 Ga; Ottertail Lake Northeast roadcut, near Bruce Mines, Ontario, Canada) 6 (47656652742).jpg - Ser Amantio di Nicolao