After study, this SU is tentatively associated with a series of cuts and fills in proximity to it: SUs 334 (Fill SUs 121, 329, 332), 336 (Fill SU 335) 118 (Fills SUs 109 (packing), 119), 518 (Fill SU 517). This SU is tentatively dated to the Iron Age/Archaic phase of activity in the area and the depression with its halo of further cuts might possibly be interpreted as a large posthole re-done many times.
Dump of quarry waste that fills a circular cut placed inside another one of rectangular shape