We are taking gravity cores to sample the uppermost sediment layer near the lake floor vents. In some cases we may be able to sample sediments that were deposited during the Little Ice Age, some 1600 years ago. Sediments near the vents are altered by the hydrothermal fluids, which changes their composition. In addition, the pore fluids in the sediments contain hydrothermal components that will help us understand how the hydrothermal fluids migrate through, and interact with, the lake floor sediments.
Photos by Rob Sohn, WHOI. Work was completed under an authorized Yellowstone Research Permit.