Excavation notebook 6

at 7h, the same + 2 pumps ! + Stathis

Work with the mechanical digger = to the east, end of the E/W section - (clearing of a remnant of ramp 710 + unexcavated area) _ to the west, deeper work in J10/4, to clear the top and the west face of wall 460

W-E section end of the cutting of a W / E section on the north end of ramp 710 - 2 important elements = ① - the bedrock is found everywhere, in a straight regular W - E line = marine sandstone, whose surface breaks down into clayey sand very soft and friable numerous vermets Has this rock - t. been arranged by man ? at to be checked with Paul Sanlaville. - towards the North, the rock dips steeply ± steeply, and one reaches very quickly (≃ 0.50 to 1 m) a _zone unstable_ , without lower support = sea ? = lake ? -> it seems fairly obvious that the rock marks a shoreline -

② one sees in section, from bottom to top - - the rock = altitude = 1.05 m ▲ 1.05 - a thick layer of very compact green clay ± 0.40 m thickness (= decomposition of the upper layer of the underlying rock ?) - - a thick white floor, which could be the stopping floor of ramp 491 - the brick walls and the fill of the ramp 710 and of the floor 720 - See drawing p. 6 -