Descriptive Attribute	Value(s)
Architectural or Soil Locus?	Soil
Phase	XIV XI XII X IX XIII
Overlies	Locus 9.
Phase Description	Phase XII: Use levels, robbing and abandonments continue. Phase X: Site abandonment post major collapse dating to the Byzantine period from the CE 4th to 5th c.... Phase XIV: Modern period marked by Bedouin activity and the accumulation of recent debris. Phase XI: Further collapse post- CE 5th c., possibly the result of the earthquake of CE 512. Major collapses... Phase IX: Major CE 363 earthquake leads to the collapse of the West Colonnade directly on top of the... Phase XIII: Major collapses continue into the Islamic period.
Description	Locus 21 defines a section of the collapse elements found in series while excavating the west area of Locus 9, between the 19th and 24th arch springers toward the north. In this locus were four partially seriated rows of arch slabs lying with their north south ends still resting on top of their associated arches [see sketches of 14/VII/04 and 17/VII/04]. At the time these elements collapsed the underlying deposit of fill and architectural fragments sloped from north to south and west to east. This allowed the south and east portions of the seriated collapse to settle up to 0.60 m lower than the north and west portions. The appearance of this assemblage was the first direct evidence derived from Trench 97, which elucidates the characteristics and usage of the arch slabs for the West Cryptoporticus East. It is notable that the construction technique was completely different from that used in the vault discovered by Martha Sharp Joukowsky in Trench 100 at the north end of the East Cryptoporticus West. The surrounding fill was identical to that of Locus 9.
Top (m)	Opening elevation: ca. 895.450 (average).
Stage Description	Major collapse.
Combined with	collapse elements in Loci 1,4, 2, 8, 9, 10, 19, and 20.
Definition	Heavy collapse layer of arch stones and slabs in partial series, between the 19th and 24th arch springers
Stage	Stage 6
Bottom (m)	Closing elevation: ca. 894.933 (average).
Underlies	Locus 9.
Location	Lower level of Locus 9, between the 19th and 24th arch springers toward the north.