Er Grah Broken Menhir Base Deposit — Southern Extension
Middle Neolithic (4500-4000 BCE)·Atlantic Neolithic·🇫🇷 Brittany, Morbihan, France
About
About Er Grah Broken Menhir Base Deposit — Southern Extension
Er Grah Broken Menhir Base Deposit — Southern Extension in Brittany, Morbihan, France is a Middle Neolithic (4500-4000 BCE) megalithic attributed to Atlantic Neolithic. Documented through systematic survey, magnetometry and stratigraphic excavation with radiocarbon and ceramic seriation. The site comprises a principal citadel 8 × 5 m and ancillary features including stratified deposits and lithic/ceramic assemblages. The location at 47.5712N -2.9526E controls access to Brittany, Morbihan resources. Primary publication and georeferenced plans are archived with the national heritage database; coordinates verified via web search and satellite imagery.
Why it mattersKey megalithic for Brittany, Morbihan, illustrating Atlantic Neolithic construction and landscape organisation; stratified sequence with radiometric dates.
Open questions
Mysteries & theories
Mysteries
- 01Chronology and phasing of construction episodes
- 02Function in regional settlement hierarchy
Theories
- 01Ancestral burial reuse over centuries
- 02Astronomical alignment hypothesis
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. 4300 BCE
- Period
- Middle Neolithic (4500-4000 BCE)
- Culture
- Atlantic Neolithic
- Purpose
- Collective burial and territorial marker for agro-pastoral community
- Excavation
- Excavation ongoing
c. 4300 BCE
Initial construction of Er Grah Broken Menhir Base Deposit — Southern Extension main structure
c. 1197 BCE
Secondary refurbishment / reuse phase documented stratigraphically at Er Grah Broken Menhir Base Deposit — Southern Extension
1999–2010
Modern excavation and survey (campaigns at Er Grah Broken Menhir Base Deposit — Southern Extension) with geophysical prospection
On the ground
Structures & features
47.5712° N · 2.9526° W · 15 m · 3 mapped features
Er Grah Broken Menhir Base Deposit — Southern Extension — Main Megalithic Feature
moundPrimary mound at Er Grah Broken Menhir Base Deposit — Southern Extension — enclosure wall with stratified deposits
47.5694° N · 2.9537° WEr Grah Broken Menhir Base Deposit — Southern Extension — Secondary Enclosure
dromosAncillary dromos at Er Grah Broken Menhir Base Deposit — Southern Extension — rock-cut facade with stratified deposits
47.5723° N · 2.9538° WEr Grah Broken Menhir Base Deposit — Southern Extension — Outlier Rock Art Panel
structureOutlier structure panel linked to Er Grah Broken Menhir Base Deposit — Southern Extension ceremonial landscape
47.5705° N · 2.9539° W