- installations that are set in place intentionally, and appear as either horizontal surfaces or as ordered aggregation, and
- deposits that can result either from either layering or buildup, or else from an amorphous amassment.
The main typological categories (surfaces, build-up, etc.) are listed according to types as defined in the pertinent section of the Grammar.
| Category | Total | Percentage | Definitions | Sub-Total | Percentage |
|---|---|---|---|---|---|
| buildup | 26 | 52% | ash | 1 | 4% |
| lens type b | 1 | 4% | |||
| lens type d | 19 | 73% | |||
| topsoil | 5 | 19% | |||
| fill, dumping, collapse | 4 | 8% | brickfall | 4 | 100% |
| installation | 11 | 22% | isolated stone | 11 | 100% |
| other features | 8 | 16% | volumetric material | 8 | 100% |
| surface | 1 | 2% | floorsurface in general | 1 | 100% |
| Total | 50 | 100% | |||