Diagram illustrating typical hot spring subenvironments, their physical/chemical characteristics, biota, diagnostic sediments and sediment fabrics and potential taphonomic fate of vertebrate carcasses (adapted from Guidry & Chafetz 2003b, fig. 4). Only the terrace pool environment has the requisite hydrodynamic, physico-chemical, biotic and sedimentological characteristics to have allowed mouldic preservation of the coot carcass.