Editing Harris matrix (section)

====Completed matrix====
[[File:Harris matrix example.jpg|thumb|left]]
[[File:Example of a simple stratigraphic sequence as visualised using a Harris matrix diagram.png|thumb|320x320px|Example of a simple stratigraphic sequence, as visualised using a Harris matrix diagram]]
The later a context's formation is, the higher it is in the matrix, and conversely the earlier it is, the lower. [[Relationship (archaeology)|Relationships]] between contexts are recorded in the sequence of formation, so even though wall 2 is physically higher than other contexts in section, its position in the matrix is immediately under backfill 3 and below floor 6. This is because the formation of the backfill and floor happened later. Also note the matrix splits into two parts below the construction cut 5. This is because the relationships across the section have been destroyed by the cutting of construction cut 5 and even if it is likely that layers 1 and 4 are probably the same deposit the information can not be guaranteed if the only information we had was this section. However the position of cut 5 and natural layer 11 "ties" the matrix together above and below the split in the matrix.