Descriptive Attribute	Value(s)
Designator	Floor/Surface
Context rating	Primary
General remarks	Locus 172 is the floor associated with the large building in the northern part of the trench. It is bordered by wall 159 and was sealed by the collapse layer in Locus 167.
Strat below	167
Strat above	184
Strat abuts	159, 179
Top depth center	587.43
Top depth west	587.46
Top depth east	587.46
Bottom depth west	587.41
Bottom depth east	587.37
Dimension length	3.8
Dimension width	1.7
Start date	2007-06-24
End date	2007-06-28
Color	7.5 YR 3/4 Dark Brown
Texture	silt
Composition	Very fine compact silt
Tentative Date	Ubaid
Has note	Contexts excavated in trenches were recorded using the "locus system." A locus is any discrete three-dimensional entity excavated in a trench. The key to the locus system is the recognition that a locus is any one thing. Differences in soil composition or texture are therefore as important as, for example, the difference between a pit and a wall. If two entities were distinct, they were considered separate loci and were therefore assigned separate locus numbers. It should also be noted that every context excavated in a trench was given a locus number and thus the trench itself is made up completely of excavated loci.