Evaluation excavations in November 2010 by The Orkney Research Centre for Archaeology (ORCA) on the mound at Banks established that it represents a Neolithic chambered tomb. The surviving heart of the monument consists of five burial cells, one with an upper shelf. These are partly subterranean and are constructed within a quarry into the bedrock. The central chamber, aligned east to west, has an entranceway leading off to the north, two larger cells at either end, a single cell to the north and two cells to the south. The North and East cell contained human bones placed on top of a layer of slabs. This formed some type of closing deposits as if it was a final gesture.
Six bones including skulls were found in each of the two chambers.