File:Roughout (profile) (FindID 490089).jpg
Original file (1,280 × 960 pixels, file size: 494 KB, MIME type: image/jpeg)
Captions
Summary[edit]
roughout (profile) | |||
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Photographer |
Royal Institution of Cornwall, Anna Tyacke, 2012-02-22 14:05:58 |
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Title |
roughout (profile) |
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Description |
English: Weathered cobble of greenstone, oval in plan and ovoid in profile and section. There is rough working over the whole of the surface of the flat oval shape which may have once been an axehead roughout, and has since been broken and weathered. One end tapers more to a rounded point, but there is no clear blade or butt end. The ventral face is more flat, mainly through weathering, while the dorsal face is more pecked. This is one of a group of 14 stone tools described as 'potential axes' that have been found on Clodgy Moor or Trungle Moor in Paul parish. A few of these have distinct areas where grinding has been carried out to start a blade. The remainder have a broadly axe-shaped outline and apparent traces of pecking. Examination of most of this group by Roger Taylor, as part of the Clodgy Moor Project, has confirmed that of they are gabbroic greenstone, except for one described as volcanic greenstone. One or two of these he identifies as of similar lithology to that of the greenstone Gwavas quarry nearby. Of the group as a whole Roger Taylor comments that the overall shape of each piece, the apparent 'axe' shape, is due to these pieces having previously been cobbles. However this was way back in geological time before the Quaternary period, as most of the apparent pecking is due to weathering subsequent to the formation of the cobbles. He quotes remnant high level beach material from the Crousa Gravels overlying the gabbro in the Lizard and other material overlying the Carnmennellis Granite as parallels. He considers that the greenstone in all these pieces is comparatively soft, and indeed this can be clearly seen when the group is compared to the hammerstone/pestles. However some of the pieces clearly have areas of grinding over the weathering. The most likely interpretation for this group as a whole is that they were collected as potential axe-making material: their close concentration in one part of the study area makes natural occurrence extremely unlikely (Henrietta Quinnell, Clodgy Moor stonework, forthcoming).
Similar short rounded axes have been excavated from the Neolithic settlement at Carn Brea and are illustrated in Mercer (1981) on page 155, Fig.64, for example, No.S7. |
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Depicted place | (County of findspot) Cornwall | ||
Date | between 4500 BC and 2100 BC | ||
Accession number |
FindID: 490089 Old ref: CORN-4F4B17 Filename: 570.8profile.jpg |
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Credit line |
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Source |
https://finds.org.uk/database/ajax/download/id/371244 Catalog: https://finds.org.uk/database/images/image/id/371244 Artefact: https://finds.org.uk/database/artefacts/record/id/490089 |
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Permission (Reusing this file) |
Attribution-ShareAlike License | ||
Other versions |
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File history
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 18:21, 24 January 2017 | 1,280 × 960 (494 KB) | Fæ (talk | contribs) | Portable Antiquities Scheme, CORN, FindID: 490089, neolithic, page 518, batch count 1963 |
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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 | 10/1,819 sec (0.005497526113249) |
F-number | f/4.4 |
ISO speed rating | 100 |
Date and time of data generation | 17:03, 16 February 2012 |
Lens focal length | 12.2 mm |
Horizontal resolution | 300 dpi |
Vertical resolution | 300 dpi |
Software used | E4500v1.2 |
File change date and time | 17:03, 16 February 2012 |
Y and C positioning | Co-sited |
Exposure Program | Normal program |
Exif version | 2.2 |
Date and time of digitizing | 17:03, 16 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 |