This appears to be either the latest phase of floor prep or a badly degraded, late period floor that once extended to cover the extenld of room G-1. This is the only surviving fragment of this floor prep layer. It's height compared to other floor prep and surface levels suggests it belongs to one of the latest phases of this possible portico area in G-1. The SU is extremely square, and it appears to have been sectioned by the SAR in order to determine what other stratigraphic layers lay underneath it.