made by pecking on schist and granite faces polished by glaciers would
date from the bronze age (end of the neolithic, between -1800 and -1500-).
|le Christ||Le Chef de tribu|
The head of the tribe's outstrechted arms seem to point out the north-south axis. The altar rock, the head of the tribe rock (the most important of the site) and the Rouelle rock are situated according to this north-south axis.The Head of the tribe thus would have permitted to aim at the sun on the summer solstice, the autumn equinox and on the exact day between these two dates.
The 6 th august
rock shows a drawing that corresponds to the path of the sun above
the equator during one year, between the solstice and the equinox.
On the same rock, an other drawing depicts two sinusoidals conform
to the twelve lunar cycles.