This seems to be a crushed tufo floor preparation that would have been covered with a finished surface of white cocciopesto, some of which is preserved here; more of this preparation is preserved just to the south (SU 7159). Comparanda are known from the Area F building. This floor surface would have belonged to a interior/covered room of the original phase delimited by walls 7148 (south), 7078 (east), and 7146/7098 (north).