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

France France, officially the French Republic, is a country located primarily in Western Europe. Overseas France, Its overseas regions and territories include French Guiana in South America, Saint Pierre and Miquelon in the Atlantic Ocean#North Atlan ...

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 alumi ...

, 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