File:Axe roughout (ventral) (FindID 486909).jpg
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Captions
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Summary
[edit]axe roughout (ventral) | |||
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Photographer |
Royal Institution of Cornwall, Anna Tyacke, 2012-02-06 18:42:06 |
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Title |
axe roughout (ventral) |
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Description |
English: Metamafic greenstone axe roughout which has been petrologically analysed by Dr. Roger Taylor as part of the Clodgy Moor Project. Sub-ovate in section and plan with angled sides that taper towards the butt end, and lozenge-shaped in profile. The roughout has been shaped and ground from a weathered cobble to create a blade end and sides to the axe. The roughout is off-centre and its section not quite elliptical, or symmetrical either side of the mid-line. This shows that it was made from a cobble where one side maintains the original smooth surface that is due to the underlying crystalline formation over time, and the other has been pecked and ground, giving it a rougher, newly exposed surface which comes from inside the cobble (Dave Weddle pers comm). The greenstone is typical of that found in the west of Cornwall from known outcrops such as Penlee and contains pale felspars and dark amphibole inclusions (Dr. Roger Taylor pers comm - see notes below).
Examples of similar roughouts and axes have been excavated from the Neolithic settlement at Carn Brea (Mercer, 1981) and are referred to and illustrated on pages 155 & 158, Fig.64, Nos.S5 & CO166. |
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Depicted place | (County of findspot) Cornwall | ||
Date | between 4500 BC and 2100 BC | ||
Accession number |
FindID: 486909 Old ref: CORN-00EE57 Filename: coredaxe4ventral.jpg |
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Credit line |
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Source |
https://finds.org.uk/database/ajax/download/id/368885 Catalog: https://finds.org.uk/database/images/image/id/368885/recordtype/artefacts archive copy at the Wayback Machine Artefact: https://finds.org.uk/database/artefacts/record/id/486909 |
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Permission (Reusing this file) |
Attribution-ShareAlike License | ||
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Licensing
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File history
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 17:55, 24 January 2017 | ![]() | 960 × 1,280 (453 KB) | Fæ (talk | contribs) | Portable Antiquities Scheme, CORN, FindID: 486909, neolithic, page 510, batch count 1827 |
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File usage on Commons
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Metadata
This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong.
Camera manufacturer | NIKON |
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Camera model | E4500 |
Exposure time | 10/2,077 sec (0.0048146364949446) |
F-number | f/4.6 |
ISO speed rating | 100 |
Date and time of data generation | 13:06, 2 February 2012 |
Lens focal length | 10.4 mm |
Horizontal resolution | 300 dpi |
Vertical resolution | 300 dpi |
Software used | E4500v1.2 |
File change date and time | 13:06, 2 February 2012 |
Y and C positioning | Co-sited |
Exposure Program | Normal program |
Exif version | 2.2 |
Date and time of digitizing | 13:06, 2 February 2012 |
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 |