E-W running linear spread of tufo and basalt rubble mixed with tile located S of large rubble spread 4022 and N of wall 4025. S side very linear and straight, N more uneven. Small N-S running section of E side abuts wall 4025. Function uncertain to be clarified upon excavation. *layer photographed, photomodeled, and shot in in 2011; to be excavated in 2012
Linear spread of stones