Calcification

Lee Vining, California - Tufa towers in Mono Lake

Liberty Cup, Palette Spring at back, Lower Terraces

Terraced travertine thermal pools, Pamukkale, UNESCO

Terraced travertine thermal pools, Pamukkale, UNESCO

Terraced travertine thermal pools, Pamukkale, UNESCO

Travertine terraces, hot springs, mineral deposits

Travertine Terraces at Hotspring, Palette Spring

Travertine Terraces at Hotspring, Mound Terrace

Dead trees on sinter terraces, hot springs, orange

Sinter terraces, hot springs, mineral deposits