Dalles

Dalles is the plural form of the French dalle, usually translated as a flagstone or paving-stone but with other meanings, including a drain-gutter on the bridge of a ship. In the combination dalles des morts it usually means a gravestone. In voyageur French, it came to mean a rapids or narrows on a river. Its most famous application is for The Dalles, Oregon, which is at the site of the former Grandes Dalles de la Columbia, but there are many locations in North America that are named a "dalles":