Descriptive Attribute	Value(s)
Top (m)	Opening Elevation: A – 1.85 m.
Bottom (m)	Closing Elevation: A – 2.32 m.
Overlies	Unknown.
Phase	I
Underlies	Locus 1.
Location	0.40 m east of the West Walkway Wall (Locus 6), bonded to the Ashlar/Rubble Fill of the Platform (Locus 3).
Description	Locus 4 represents one of the most fascinating discoveries of Special Project 109. It is composed of one enormous ashlar (measuring almost 2.31 m in length) that was carved from sandstone/limestone. It is the original boundary of the Temenos Platform, and retains the Ashlar/Rubble fill of the Platform (Locus 3). It is unclear what it is set in, or how it connects with the Platform as a whole, however, it does represent the monumentality of the Platform construction, and indicates the west boundary of the Platform was originally 0.40 m to the east of where the West Walkway Wall (Locus 6) currently stands.
Definition	West Boundary of Platform
Stage	Stage 1
Size	2.31 m north south-by-0.52 m east west.
Stage Description	Initial construction of Temenos Platform.
Bonds to	Loci 3, 5.
Phase Description	Phase I: Preparation: 1st c. BCE subterranean canalization is installed and the bedrock leveled with a coarse yellow soil.
Abuts	Locus 2.
Architectural or Soil Locus?	Architectural