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Description: | Cast copper-alloy tanged chisel of probable Middle Bronze Age date (1500 - 1150 BC). The chisel is 99.2mm in length and weighs 109.41 grams. The blade is sub-rectangular in plan with convex expanding (flaring) sides and a convex cutting edge. In profile the blade is sub-triangular with the widest (thickest) section being before the stop ridge. The sides of the blade are convex. The blade (measured from the cutting edge to the stop ridge) is 56.9mm long and the width of the convex cutting edge is 31.4mm. The thickness of the blade tip is 3.2mm. The maximum thickness of the blade is 14.3mm (measured at thickest part below the stop ridge, the width at this point is 26mm). The blade of the chisel is asymmetrical in both plan and profile with one side being slightly wider with a larger convex flare. This is likely to be the result of wear rather than distortion from abrasion. There are no visible hammer scars along the blade. There is also no visible decoration on the blade, such as cast ribs or incised lines.
The tang is set at right angles (90??) to the blade. The rear part of the chisel (from the stop ridge to the butt) is sub-triangular in plan and sub-rectangular in profile. The tang expands from the stop ridge with the widest part being two thirds of the way along its length. The cross section of the tang is 'H' shaped with the edges of each side being slightly raised to form side flanges. The tang septum (the area between the flange facets and the stop ridge) is 44.4mm long, 9.8mm wide, and 7.4mm thick. The butt of the chisel has been slightly damaged leaving one corner broken and jagged. The butt is 15.1mm wide and 3mm thick.
The chisel is mid green/brown with an even abraded patina that covers all surfaces. There are two areas of un-abraded polished dark green patina on the tang. These areas are located between the side facets and against the stop ridge. They have survived because of the nature of the abrasion that has affected the rest of the chisel. The abrasion to the rest of the chisel seems to have been formed by a number of factors; mostly movement in the soil. This has led to the edges of the chisel (especially the raised flanges and butt) being abraded. The patina has also been damaged by pitting and corrosion (possibly fertilizer or chemical damage). There are very few areas of active light green powdery corrosion on the chisel. | Subjects: | Tanged | Source: | Portable Antiquities | Creator: | Reavill, Peter - Portable Antiquities Scheme | Identifier: | http://www.findsdatabase.org.uk/hms/pas_... | Language: | en-GB | Go to resource |
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