At the suggestion of Peyrony, Ami excavated a
trench in this area that began just above the road and continued upslope in the
direction of Abri Peyrony. The size of this trench, which appears to have been
quite irregular, is enormous: it is about 35 m in length and varies in width
between a little over 2.5 m at the top (i.e. furthest upslope) to a maximum
width of about 10 m in its central portion; it is approximately 8 m wide at its
base, and with. The average thickness of the archaeological deposits is about 3
m. This represents approximately 700 m3 of deposit, most of which was
excavated between 1926 and 1931.