 At least five hot springs exist in valleys near Mount Cayley, providing more evidence for magmatic activity. This includes springs found at Shovelnose Creek and Turbid Creek on the southern flank of Mount Cayley and Brandywine Creek on the eastern flank of the volcanic field. They are generally found in areas of volcanic activity that are geologically young. As the regional surface water percolates downward through rocks below the Mount Cayley field, it reaches areas of high temperatures surrounding an active or recently solidified magma reservoir. Here, the water is heated, becomes less dense and rises back to the surface along fissures or cracks. These features are sometimes referred to as dying volcanoes because they seem to represent the last stage of volcanic activity as the magma at depth cools and hardens.
