File:Microcore (plan) (FindID 839410).jpg
![File:Microcore (plan) (FindID 839410).jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/5/5e/Microcore_%28plan%29_%28FindID_839410%29.jpg/800px-Microcore_%28plan%29_%28FindID_839410%29.jpg?20181217041453)
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Captions
Captions
Summary
editmicrocore (plan) | |||
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Photographer |
Royal Institution of Cornwall, Anna Tyacke, 2017-03-29 17:23:14 |
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Title |
microcore (plan) |
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Description |
English: A chert single-platform micro-core, oval in plan, plano-convex in profile and in section. The pebble was initially broken in half by a single blow, the point of percussion of which is visible at the left margin of the resulting striking platform. The bulbar scar can be seen originating from this point although the remainder of the surface of the striking platform is very irregular and featureless. Subsequently around eight thin flakes were removed from the edge of the platform, the scars of which can clearly be seen around about three-fifths of the circumference of the artefact. The cortex of the pebble has been left on the remaining two-fifths. The surface of the chert has been made coarse through weathering and is mottled grey to brown in colour. The cortex has patches of pale brown and grey and its pitted surface indicates that it is derived from a local beach pebble.
Bond (2004) illustrates a similar single-platform microblade core on page 113, fig.5.97, no.L21, which is dated from the later Mesolithic period. Butler (2005) illustrates a similar single-platform bladelet core on page 85, fig.30, no.8, which is dated from the Mesolithic period. |
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Depicted place | (County of findspot) Cornwall | ||
Date | between 7000 BC and 4500 BC | ||
Accession number |
FindID: 839410 Old ref: CORN-9561CE Filename: DSCN4769.JPG |
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Credit line |
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Source |
https://finds.org.uk/database/ajax/download/id/608985 Catalog: https://finds.org.uk/database/images/image/id/608985/recordtype/artefacts archive copy at the Wayback Machine Artefact: https://finds.org.uk/database/artefacts/record/id/839410 |
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Permission (Reusing this file) |
Attribution License |
Object location | 50° 11′ 17.52″ N, 5° 24′ 18.72″ W ![]() | View this and other nearby images on: OpenStreetMap | ![]() |
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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 | 04:14, 17 December 2018 | ![]() | 1,600 × 1,200 (667 KB) | Fæ (talk | contribs) | Portable Antiquities Scheme, CORN, FindID: 839410, mesolithic, page 1979, batch count 13834 |
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Metadata
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Camera manufacturer | NIKON |
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Camera model | E4500 |
Exposure time | 5/1,066 sec (0.0046904315196998) |
F-number | f/3.6 |
ISO speed rating | 100 |
Date and time of data generation | 16:25, 29 March 2017 |
Lens focal length | 17.3 mm |
Orientation | Normal |
Horizontal resolution | 300 dpi |
Vertical resolution | 300 dpi |
Software used | Microsoft Windows Photo Viewer 6.1.7600.16385 |
File change date and time | 16:58, 29 March 2017 |
Y and C positioning | Co-sited |
Exposure Program | Normal program |
Exif version | 2.2 |
Date and time of digitizing | 16:25, 29 March 2017 |
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 |
Custom image processing | Normal process |
Exposure mode | Auto exposure |
White balance | Manual white balance |
Digital zoom ratio | 0 |
Focal length in 35 mm film | 83 mm |
Scene capture type | Standard |
Scene control | None |
Contrast | Normal |
Saturation | Normal |
Sharpness | Normal |
Subject distance range | Unknown |