rimstone

American  

[rim-stohn] / ˈrɪmˌstoʊn /

noun

Geology.

1. a calcareous deposit forming a dam at the edge or outlet of an overflowing pool of water, as in a cavern.

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Etymology

Origin of rimstone

First recorded in 1925–30; rim + stone

Example Sentences

The tiny crystals have built up over the last several months, eventually creating flat terraces stacked atop one another like the travertine rimstone and dam terraces at Yellowstone’s Mammoth hot springs.

From The Guardian

The tiny crystals have built up over the last several months, eventually creating flat terraces stacked atop one another like the travertine rimstone and dam terraces at Yellowstone’s Mammoth Hot Springs.

From Seattle Times

Head deeper into the Xe Ban Fai valley for caving along one of the world’s largest river passages, to walk one of the world’s largest rimstone basins, and the chance to eyeball the world’s largest spider, the foot-wide giant huntsman.

From The Guardian