Descriptive Attribute	Value(s)
Architectural or Soil Locus?	Soil
Underlies	Nothing.
Combined with	Locus 19.
Description	This is a Brown (Munsell 7.5 YR 5/4), loose, sandy overburden layer, which includes area within and immediately adjacent to doorway. The soil quality of Locus 21 is similar to that of Locus 18 and also includes some large limestone ashlars, dislodged during collapse. The soil in Locus 21 contains a comparatively high concentration of wall plaster, as well as a high concentration of stone and plaster architectural fragments. Many of these were cornice fragments. One limestone corner cornice of the doorway (Seq. No. 73119), in good condition, had collapsed in the exact center of the doorway (1.15 m from the southernmost side of the doorway). Much of the contents of the doorway, including a damaged column drum with a Mason’s Mark (with diameter of approximately 1.20 m), were removed with the bulldozer.
Phase	XI XII XIII
Phase Description	Phase XII: Use levels, robbing and abandonments continue. Phase XI: Further collapse post CE 5th c., possibly the result of the earthquake of CE 512. The east Porch columns and Central Arch collapse and fluvial deposits continue ... Phase XIII: Major collapses continue into the Islamic period.
Top (m)	Opening levels: 909.38 m at northeast, 910.005 m at southeast.
Stage	Stage 8
Stage Description	Secondary collapse from major seismic activity. Columns collapse.
Definition	Wall overburden, Central Doorway
Bottom (m)	Closing levels: 907.88 m at northeast, 908.505 m at southeast.