Contains mixture of medium to large blocks, irregular rubble, walling bricks, roof tiles, plaster, and mortar. Represents sudden and catastrophic collapse of building, when segmented dome imploded first and then roofless walls fell inward and outward. Structural debris intermingled with both fine sediment onto which it collapsed and mixed colluvium that washed over it and filled interstices between large architectural pieces.
Published as
Rife2022a, pp. 95-97, 168, figs. 3.28, 3.65, 3.66, 3.74-3.79
Massive deposit of structural debris covering Octagon, spreading outward from its walls, and sealing underlying deposits.
Location in unit
Over architectural remains of Octagon, up to high level below modern ground.
Soil matrix
Over building proper but decreasing beyond its walls are large blocks that constitute clast-supported matrix; intermingled with many large fragments of mortar/plaster and tile/brick, some disintegrating. Infiltrating sediment is pale to yellowish brown (10YR 5/4, 6/3, 7/4) with large patches of light gray (10YR 7/2) over chamber and to north pockets of pink (7.5YR 7/3) from dissolving brick; very loose, fine to sandy silt with many very small pebbles (<1 cm range).
Stratigraphic associations
((TRB0911-003+TRB0911-004)/TRB0911-005/TRB0911-006) [outside Octagon to north]=TRB0910-003 [over north ambulatory]=(TRB1110-007+TRB1110-012) [over northwest ambulatory]=((TRB0912-003=(TRB0912-005/TRB0912-006)) [over central chamber]=(TRB0913-003+TRB0913-004) [over southwest ambulatory]+TRB0913-005 [over south chamber]=(TRB0914-005+TRB0914-006) [outside Octagon to south]