This fill appears to be plaster and other materials, perhaps part of an original leveling layer similar to 6272. It fills one of many cuts into the bedrock in this area (6305, 6306, 6307, 6308, 6309, 6311, 6312, 6313) which were visible upon the removal of geotextile in the southern portion of room G-10. Because we did not excavate the soil layers associated with them it is difficulty to determine when they were made. Some appear to be postholes but others are more irregular in shape.