Bedrock level across the entire site. Exposed in different areas almost every year. Catch-all bedrock SU.
Room 7, South and West sides
Two basalt blocks on top of the bedrock in room 13.
Fill for floor prep under tufa slabs (Fs) and bedrock
Orthostate wall in Fw with nearby floor slabs
Tufo slab floor drain cover west of block 5586 (5739), Tufo step threshold west of wall 5574 (5740), Continuation of east-west ashlar wall west of 5740 (5741) and Single ashlar block oriented diagonally north of wall 5741 (5771)
Western ashlar wall of complex, under wall 5157 (concrete portion)