From French gour (“rock pool”), from Latin gurges. Doublet of gorge and gurges.
Meanings
A pool in a cave confined by a dam of mineral deposits accumulating along its rim.
[…] calcite precipitates. This forms a small dam, accentuating the phenomenon and causing the formation of a calcite dam tilted towards the center of the gour. As water evaporates from the surface of the gour, a thin film of calcite often forms, […] 2015, Eric Gilli, Karstology: Karsts, Caves and Springs, page 80: