These stones are coated with a unknown substance that may be geological or it may be wattle and daub.
A cluster of stones associated with another cluster of stones 3573 belonging to the stone feature 3568 that may be a structural feature relating to the hut. Alternately it may be a tomb marker and the feature appears to continue beneath the pedestal of wall 3031.
Stones with yellow coating of feature 3568, beneath 3573