Shallow interface layer under cleaning layer and over good archaeological context. Defines as interface so as to have a buffer between top soil with high level of contamination and start of collapse.
SU 17167: view to north
Detail of SU 17167 covering collapsed daub and plaster in 17166: view to north-east
Detail of SU 17167; view to east
SU 17167 removed; view to the east
Su 17167 removed; view to north
Detail of SU 17167 removed; clear view of RPP's back fill (17173) that fills the cut of RPP's trench (17172) from 2012; view to north