12,000 years ago, Yellowstone’s dry summers began leaving a charcoal trail in its lakes. 6,000 years later

12,000 years ago, Yellowstone’s dry summers began leaving a charcoal trail in its lakes. 6,000 years later The Economic Times Montana State researchers reconstruct environmental history of Yellowstone’s geyser basins Bozeman Daily Chronicle Lower Geyser Basin reconstruction Bozeman Daily Chronicle