This document provides information on hot springs, geysers, and the geological conditions required for their formation. It begins by defining hot springs and their mineral content. It describes how hot springs can be heated by geothermal gradients or volcanic activity. It then discusses different types of features including fumaroles, mudpots, pools, and different categories of geysers. The document concludes by outlining the water, heat, rock, and plumbing requirements for geysers to form and erupt, and methods for dating geyser activity.