Er Lannic Stone Circles
Er Lannic Cromlech · Gulf of Morbihan Double Cromlech
Early to Late Neolithic·Morbihan Atlantic·🇫🇷 Brittany, Morbihan, Arzon (Gulf of Morbihan), France
About
About Er Lannic Stone Circles
Tidal double stone circle (cromlech) on the island of Er Lannic in the Gulf of Morbihan, Brittany, built c.4500–3000 BCE and now half-submerged by 4 m of Neolithic sea-level rise. Two conjoined cromlechs (northern 65 m, southern 50 m) of granite boulders enclose a former causeway. Visible at low tide and fully submerged at high tide, it is the type site for submerged Atlantic stone circles.
Why it mattersTidal double stone circle (cromlech) on the island of Er Lannic in the Gulf of Morbihan, Brittany, built c.4500–3000 BCE and now half-submerged by 4 m of Neolithic sea-level rise. Two conjoined cromlechs (northern 65 m,
Open questions
Mysteries & theories
Mysteries
- 01Submersion chronology matching sea-level rise
Theories
- 01Tidal as ritual lunar alignment
Theories are interpretations, not findings. The seal above tells you how much scholarly weight the place carries.
History
How it came to be
- Built
- c. 4500–3000 BCE
- Period
- Early to Late Neolithic
- Culture
- Morbihan Atlantic
- Purpose
- Double tidal stone circle (submerged)
- Excavation
- Partially excavated
c. 4500–3000 BCE
Initial construction
c. 1426 CE
Rediscovery
On the ground
Structures & features
47.5675° N · 2.8905° W · 2 m · 2 mapped features
North cromlech
stone circle65 m diameter northern circle, half on tidal flat, boulders to 2 m
47.5675° N · 2.8905° WSouth cromlech
stone circle50 m southern circle conjoined to north, more submerged at high tide
47.5672° N · 2.8903° W