Non-marine carbonate: Wherefore art thou?

Introduction of the special issue on non-marine carbonates. (A) Sub-lacustrine spring pinnacles from alkaline Mono Lake (California, USA); scale is 2 m. (B) Cascade tufa from Sarikavak (TK); scale is 175 cm. (C) Travertine deposits from Pamukkale (TK); scale is 170 cm. (D) Speleothems and flowstones from Kaklik Cave (TK); hammer for scale. (E) Temporarily exposed microbial bioherms at Bridger Bay shoreline, Antelope Island, Great Salt Lake (Utah, USA); sedimentologists for scale. (F) Upper Jurassic rhizolite laminar calcrete (base at hammer edge) from Rochaforte (Portugal; courtesy of V.P. Wright; Wright & Azeredo, 2006). (G) The Brook Bottom leachate deposit (Harpur Hill, Derbyshire, UK). Anthropocene carbonate deposit forming downstream of a legacy deposit of impure lime, left by historical industrial activity at the site (courtesy of Laura Bastianini); scale is about 10 m.