Zircon dating conclusively dated the Tree River Conglomerate at 2.9 Ga, in the "Great Gold ... of the 3 diamonds range from -3.5 to -0.3 ‰, similar to the heaviest values found in ...

A California woman says she found a 1½ carat diamond while mining gold near the Sierra Nevada ... Here an ancient river flowed south to north millions of years ago, before tectonic forces created ...

The presence of diamonds in an outcrop atop an unrealized gold deposit in Canada's Far North mirrors the association found above the ... get deposited in braided river channels.