Dorsum Guettard (Moon)

Named after Jean-Etienne Guettard - French geologist, mineralogist (1715-1786).

Dorsum Guettard is a wrinkle-ridge at 10.0°S 18.0°W / -10.0; -18.0 in Mare Cognitum. (wikipedia entry)

A dorsum is a ridge, sometimes called a wrinkle ridge. On the Moon they are named after geoscientists.