Descriptive Attribute	Value(s)
Architectural or Soil Locus?	Soil
Location	Subfloor area, West end of Hypocaust Chamber, beneath Locus 13.
Bottom (m)	Closing elevation: 898.86 m.
Top (m)	Opening elevation: 899.71 m.
Definition	Soil deposit beneath west preserved portion of Suspended Floor (Locus 13)
Combined with	Loci 4, 12, 27.
Overlies	Locus 17.
Underlies	Locus 13.
Description	A soil deposit beneath the preserved section of the Suspended Floor (Locus 13). The materials in the deposit were of mixed consistencies and colors. It contained soils ranging from clay-sized to granular. The soils were also of different color ranges: 10 YR 4/2 (Dark Grayish Brown)–3/2 (Very Dark Grayish Brown) and 5 YR 6/3 (Light Reddish Brown)–5/3 (Reddish Brown). The deposit was mounded, both inside Vault Locus 18 as well as in the open area south of the vaults: its greatest depth was near the opening at the east, from where it sloped to a shallower depth toward the enclosed west side. The east side of the deposit also contained a number of architectural fragments. The shape of the deposit, as well as the admixture of soils, suggests the deposit resulted from two deposition processes: collapse followed by alluvial action. A small amount of pottery and glass were recovered during the excavation, along with a single bronze pendant.
Stage	Stage 7
Phase Description	Phase IX: Major CE 363 earthquake leads to the collapse of the West Colonnade directly on top of the...
Phase	IX
Stage Description	Collapse and sedimentation.
Size	1.05 m north south-by-0.79 m east west.