What is travertine in geology ?

Travertine : definition

Travertine refers to a continental limestone rock deposited at the emergence of carbonated hot springs and geysers. Its texture is usually bedded and vacuolar, with alternating horizontal (floors) and vertical (pillars) bedding.
The hot waters rich in dissolved silica deposit "siliceous travertines".

In both cases, these are deposits of hydrothermal origin, designated in English by the unique term "sinter", which has no equivalent in French.