This is part of the fill of the construction cut (7173) for the tufo drainage channel (7174). It was decided to excavate part of this fill in the hopes of obtaining datable materials, but the layer was small, sterile, and impossible to excavate very deeply or along much of the length of the drain.
Cut in northwest corner of Room H1; Circular fill in northwest corner of room H1; Fill of negative feature running west to east towards SE corner of Room 1; Silty layer between 7173 and 7174 on the eastern side; Cut into the center of SU 7076 towards the southern side of room 1; Ashy deposit adjacent to 7175 to the northwest in Room H1; Tufo drain structure in room H1; Layer of compact dark brown silt with tufo inclusions at S of Room 1
View from north