Santorini

hydrothermal discharge in caldera of volcano with deposits of Fe & Mn oxides, amorphous silica, siderite, and metalliferous sediments; Palaea Kameni (shallow vents), Nea Kameni (shallow vents), Santorini Caldera; http://oceanexplorer.noaa.gov/explorations/06greece/background/geology/geology.html; from Sigurdsson et al. (2006): "only low-temperature venting was observed within the Santorini caldera. Hydrothermal vents occur in both the North and South basins of the caldera. The vents form hundreds of one- to four-meter-diameter mounds of yellowish bacterial mats that are up to one meter high. Temperatures in the mounds are around 15º-17ºC, or about 5ºC above ambient temperature."; email from P. Dando 2010: "We have found new vent fields, in addition to those reported on the 2006 NOAA expedition, on the outside of Santorini"; Camilli et al. (2015): "between 250 and 235 m depth, and within 1 km of the cliff-top town of Oia, we discovered an interconnected series of meandering, iridescent white pools (Fig. 3). These 1 to 5 m diameter pools, named Kallisti Limnes (translation from Ancient Greek: Most Beautiful Lakes)";