Étang de Lers or Lake of Lers is a natural lake in the Ariège department (

France France (), officially the French Republic ( ), is a country primarily located in Western Europe. It also comprises of overseas regions and territories in the Americas and the Atlantic, Pacific and Indian Oceans. Its metropolitan ar ...

Geology

Lherzolite Lherzolite is a type of ultramafic igneous rock. It is a coarse-grained rock consisting of 40 to 90% olivine along with significant orthopyroxene and lesser amounts of calcic chromium-rich clinopyroxene. Minor minerals include chromium and alum ...

, an ultramafic rock, has its type locality at Étang de Lers. The name is derived from the old spelling "Étang de Lherz".

References

Lers {{Ariège-geo-stub