"ID","Contextual_Keyword","Description"
1,"Alluvium","natural waterborne layer"
2,"Colluvium","natural slopewash layer"
3,"Aeolian","natural windblown layer"
4,"Backfill","anthropogenic fill of cut feature"
5,"Bank","raised earthwork"
6,"Barrel pit","circular pit for holding barrel"
7,"Beamslot","linear cut for holding wood or stone partition"
8,"Building","any structure in situ"
9,"Collapse","any structural (wall or roof) collapse"
10,"Conduit","generic linear feature"
11,"Disturbance","undefined disturbance"
12,"Ditch","Large drainage channel"
13,"Doorway","access into/out of structure"
14,"Drain","small drainage channel"
15,"Excavation","archaeological trench or cut"
16,"Floor","internal surface of structure"
17,"Footing","Foundation for structure"
18,"Grave","Burial"
19,"Hearth","oven or open fire inside structure"
20,"Lining","any lining of a cut feature"
21,"Pit","generic cut feature"
22,"Posthole","cut for earthfast structural post"
23,"Postpad","stone support for free-standing structural post"
24,"Repair","repair of structural element"
25,"Robber trench","cut for the retrieval of stones from a structure"
26,"Room","partitioned space within a structure"
27,"Skeleton","articulated human or animal skeleton"
28,"Spoil","archaeologically disturbed soil"
29,"Surface","any surface"
30,"Undefined","undefined, e.g. Cleaning"
31,"Unknown","unknown"
32,"Upcast","anthropogenic disturbance of natural layers"
33,"Wall","part of a structure"
34,"Construction","construction deposit"
35,"Demolition","demolition deposit"
37,"Dump","small, thick, waste deposit"
38,"Spread","large, thin waste deposit"
39,"Natural","generic natural formation"
40,"Mound","anthropogenic raised mound"