File:Bronze Age palstave blade (casting seam) (FindID 162079).jpg
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Captions
Captions
Summary
[edit]Bronze Age palstave blade (casting seam) | |||
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Photographer |
Royal Institution of Cornwall, Anna Tyacke, 2007-05-30 23:53:40 |
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Title |
Bronze Age palstave blade (casting seam) |
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Description |
English: Cast copper alloy blade from a palstave, or Middle Bronze Age axe, which would have had built up sides and a stop ridge where the broken end is now, to stop the wooden haft or handle from slipping down the blade. The casting seams still remain on both sides of the blade. The axe seems to have been poorly cast as it looks quite porous at the broken end of the blade, and the stop ridge end has also been hammered in antiquity.
"The axe may be unused having been broken during the late stages of manufacture, or perhaps when someone first tried to use it. When you cast a palstave there is a tendency for the septum to freeze before the much thicker centre section. Hot metal can no longer feed into that area which then suffers a lot of shrinkage; as it is the last area to freeze any dross and other debris ends up in that area too. The analysis gave a high tin bronze (15.7% tin) which is much to be expected either side of the Channel at that time. The blade is as-cast and it is rather more usual to find whole or broken imported palstaves in that state than more locally produced ones. I would guess that it came from the north coasts of the Armorican peninsula to as far east as the Cotentin in France." (Report by Dr. Peter Northover, Dept. of Materials, Oxford) >From its style and thickness, it probably dates from the Taunton phase, c.1400-1300 BC. The blade is 82 mm long and 59 mm wide and 3 mm thick at the cutting edge and 22 mm wide and 19 mm thick at the butt or stop ridge end. |
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Depicted place | (County of findspot) Cornwall | ||
Date | between 1400 BC and 1300 BC | ||
Accession number |
FindID: 162079 Old ref: CORN-CA0B11 Filename: palstave 005.jpg |
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Credit line |
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Source |
https://finds.org.uk/database/ajax/download/id/139995 Catalog: https://finds.org.uk/database/images/image/id/139995/recordtype/artefacts archive copy at the Wayback Machine Artefact: https://finds.org.uk/database/artefacts/record/id/162079 |
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Permission (Reusing this file) |
Attribution-ShareAlike License |
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File history
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 09:46, 22 January 2017 | ![]() | 1,280 × 960 (489 KB) | Fæ (talk | contribs) | Portable Antiquities Scheme, CORN, FindID: 162079, bronze age, page 132, batch count 2311 |
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Metadata
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Camera manufacturer | NIKON |
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Camera model | E4500 |
Exposure time | 5/138 sec (0.036231884057971) |
F-number | f/4.9 |
ISO speed rating | 100 |
Date and time of data generation | 21:44, 20 February 2007 |
Lens focal length | 30.6 mm |
Horizontal resolution | 300 dpi |
Vertical resolution | 300 dpi |
Software used | E4500v1.2 |
File change date and time | 21:44, 20 February 2007 |
Y and C positioning | Co-sited |
Exposure Program | Normal program |
Exif version | 2.2 |
Date and time of digitizing | 21:44, 20 February 2007 |
Meaning of each component |
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Image compression mode | 4 |
APEX exposure bias | 0 |
Maximum land aperture | 2.8 APEX (f/2.64) |
Metering mode | Center weighted average |
Light source | Tungsten (incandescent light) |
Flash | Flash did not fire, compulsory flash suppression |
Supported Flashpix version | 1 |
Color space | sRGB |
File source | Digital still camera |
Scene type | A directly photographed image |