File:Neolithic greenstone axe roughout (plan) (FindID 258401).jpg
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Summary
Neolithic greenstone axe roughout (plan) | |||
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Photographer |
Royal Institution of Cornwall, Anna Tyacke, 2009-06-07 00:48:18 |
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Title |
Neolithic greenstone axe roughout (plan) |
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Description |
English: Incomplete greenstone or metadolerite axe roughout, which has been petrologically analysed by Dr. Roger Taylor as part of the Clodgy Moor Project. The roughout is a weathered cobble in the basic shape of a tear-shaped axe in plan, and is lozenge-shaped in profile and in section. There is a concentric groove that carries on around the width of the axe at an oblique angle, which was probably formed by wear if it was suspended as a weight. But many similar examples are turning up from the same field which suggests a possible local source or outcrop for this rock type. A chip of the butt end has been knocked off by the plough, revealing a dark black micaceous interior. The greenstone is typical of that found in the west of Cornwall from known outcrops, such as the Gwavas quarry, and contains pale felspars and dark amphibole inclusions (Dr. Roger Taylor pers comm - see notes below). A similar example has been excavated from the Neolithic settlement at Carn Brea and is illustrated in Mercer (1981) on page 155, Fig.64, No.S5. |
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Depicted place | (County of findspot) Cornwall | ||
Date | between 4500 BC and 2300 BC | ||
Accession number |
FindID: 258401 Old ref: CORN-47E2F1 Filename: June09finz 009.jpg |
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Credit line |
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Source |
https://finds.org.uk/database/ajax/download/id/213244 Catalog: https://finds.org.uk/database/images/image/id/213244/recordtype/artefacts archive copy at the Wayback Machine Artefact: https://finds.org.uk/database/artefacts/record/id/258401 |
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Permission (Reusing this file) |
Attribution-ShareAlike License version 4.0 (verified 14 November 2020) |
Licensing
This file is licensed under the Creative Commons Attribution-Share Alike 4.0 International license.
Attribution: The Portable Antiquities Scheme/ The Trustees of the British Museum
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image/jpeg
693310526b6c97a40169e3780ff39d3e0c41d5cd
444,312 byte
1,280 pixel
960 pixel
0.02197802197802197802 second
2.9
11.1 millimetre
100
File history
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 20:53, 22 January 2017 | 960 × 1,280 (434 KB) | Fæ | Portable Antiquities Scheme, CORN, FindID: 258401, neolithic, page 187, batch count 3305 |
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Camera manufacturer | NIKON |
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Camera model | E4500 |
Exposure time | 2/91 sec (0.021978021978022) |
F-number | f/2.9 |
ISO speed rating | 100 |
Date and time of data generation | 12:05, 2 June 2009 |
Lens focal length | 11.1 mm |
Horizontal resolution | 300 dpi |
Vertical resolution | 300 dpi |
Software used | E4500v1.2 |
File change date and time | 12:05, 2 June 2009 |
Y and C positioning | Co-sited |
Exposure Program | Normal program |
Exif version | 2.2 |
Date and time of digitizing | 12:05, 2 June 2009 |
Meaning of each component |
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Image compression mode | 4 |
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 |