SU 9012 is a layer of very compacted soil, this suggests that it was subject to tread.
SU 9012 is part of one of four road layers superimposed between the first and latest phases of the Via Gabina. Bulk ceramic finds suggest a date of between between 4th and mid 1st Century BCE. The preparation consists of layer of gravel, crushed ceramic and earth.
Gray compact layer of soil.