| Context Number | 71 |
| Type | Layer |
| Dating | |
| Description | A dark greyish-brown clay-silt with a firm composition. This included yellowish brown silt streaks (40%), larger percentage at base. |
| Comment | This may be an old root horizon. Phase 4 alluviation. |
| Context Number | 72 |
| Type | Layer |
| Dating | |
| Description | Composite natural formation consisting of bluish-grey silt mixed with brownish silt (c40%). |
| Comment | Phase 2 alluviation. Equivalent to 75. |
| Context Number | 73 |
| Type | Layer |
| Dating | |
| Description | This was a pale buff-grey silty clay with moderate orange (iron) vertical streaks, frequent charcoal flecks and occasional fragments. |
| Comment | Phase 4 alluviation. Equivalent to 122. |
| Context Number | 74 |
| Type | Layer |
| Dating | |
| Description | Composite natural formation consisting of bluish-grey silt mixed with brownish silt (c40%). |
| Comment | Phase 2 alluviation. |
| Context Number | 75 |
| Type | Layer |
| Dating | |
| Description | Composite natural formation consisting of bluish-grey silt mixed with brownish silt (c40%). |
| Comment | Phase 2 alluviation. Equivalent to 72. |
| Context Number | 76 |
| Type | Layer |
| Dating | |
| Description | A composite deposit consisting of brownish silts. Firm composition with flecks of red stone, charcoal and slag. |
| Comment | Equivalent to 70. Phase 4 alluviation that has picked up material from the layer below. |
| Context Number | 77 |
| Type | Ditch segment |
| Dating | medieval |
| Description | Segment of north to south ditch 129 in trench L. V-shaped. |
| Comment |
| Context Number | 78 |
| Type | Fill |
| Dating | |
| Description | The fill of segment 77 of ditch 129, lying in trench L. This was a compact grey-brown silt/clay. It was increasingly darker grey towards base with small flecks of charcoal and rust-red stone. A few small flecks of fired clay, slag and wood. |
| Comment |
| Context Number | 79 |
| Type | Layer |
| Dating | prehistoric |
| Description | Pale buff silty clay. Apparently identical to 73/122 which overlies slag 80, but this is under 80. Charcoal only present near 80 i.e. at the west end. |
| Comment | Phase 2 alluviation. |
| Context Number | 80 |
| Type | Layer |
| Dating | Romano-British? |
| Description | This was a thick layer of slag and charcoal, with surface dipping down to, and overlying the north-east end of, timber revetment 91. The surface also dipped to the north-west. It consisted of irregular layers of dark brown gritty silt and gravel with very large quantities of slag, frequent flecks of charcoal, and fragments of burnt clay material. These were interspersed with rust-orange material. The surface of the lower part of this deposit had traces of many horizontal timbers and branches, very decayed, lying parallel and roughly in line with 91. This was beneath the brick visible in plan. The deposit measured at least 1.2 metres by 3.0 metres. |
| Comment | This deposit was only observed in Trench L, crossing the trench obliquely. It ran out of the trench in both directions and may have been much more extensive. It must represent waste material from a fairly large-scale ironworking industry. |
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