Dorsum Guettard
Encyclopedia
Dorsum Guettard is a wrinkle-ridge
at in Mare Cognitum
on the Moon
. It is 40 km long and was named after Jean-Etienne Guettard
in 1976.
Wrinkle-ridge
A wrinkle ridge is a type of feature commonly found on lunar maria. These features are low, sinuous ridges formed on the mare surface that can extend for up to several hundred kilometers. Wrinkle ridges are tectonic features created when the basaltic lava first cooled and contracted...
at in Mare Cognitum
Mare Cognitum
Mare Cognitum is a lunar mare located in a basin or large crater which sits in the second ring of the Procellarum basin. The basin material is of the Lower Imbrian epoch, while the basaltic mare material is of the Upper Imbrian epoch...
on the Moon
Moon
The Moon is Earth's only known natural satellite,There are a number of near-Earth asteroids including 3753 Cruithne that are co-orbital with Earth: their orbits bring them close to Earth for periods of time but then alter in the long term . These are quasi-satellites and not true moons. For more...
. It is 40 km long and was named after Jean-Etienne Guettard
Jean-Étienne Guettard
Jean-Étienne Guettard , French naturalist and mineralogist, was born at Étampes, near Paris.In boyhood, he gained a knowledge of plants from his grandfather, who was an apothecary, and later he qualified as a doctor in medicine...
in 1976.