File:Microblade (ventral) (FindID 837087).jpg
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Summary
[edit]microblade (ventral) | |||
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Photographer |
Royal Institution of Cornwall, Anna Tyacke, 2017-03-16 16:44:40 |
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Title |
microblade (ventral) |
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Description |
English: A snapped flint microblade, sub-rectangular in plan, plano-convex in profile and triangular in section. The proximal end of a Mesolithic microblade representing approximately half of the original. The point and bulb of percussion are clearly visible at the proximal end of the ventral face. The scars of removal of three earlier microflakes are visible on the dorsal face. The left margin of the dorsal face has been retouched to create a cutting edge and the right margin appears notched but this is likely due to damage. Microblades and microflakes occur in large numbers in many Mesolithic assmblages. The surface of the flint is completely patinated white in colour, mottled with pale grey and derives from a local beach pebble.
Bond (2004) illustrates several similar Mesolithic flakes and blades on pages 108 & 112, figs.5.92 & 5.96, nos.149-152 & 19-20. |
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Depicted place | (County of findspot) Cornwall | ||
Date | between 8300 BC and 4500 BC | ||
Accession number |
FindID: 837087 Old ref: CORN-ABABCB Filename: DSCN4684.JPG |
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Credit line |
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Source |
https://finds.org.uk/database/ajax/download/id/607144 Catalog: https://finds.org.uk/database/images/image/id/607144/recordtype/artefacts archive copy at the Wayback Machine Artefact: https://finds.org.uk/database/artefacts/record/id/837087 |
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Permission (Reusing this file) |
Attribution License |
Object location | 50° 33′ 45.36″ N, 4° 52′ 25.46″ W | View this and other nearby images on: OpenStreetMap | 50.562600; -4.873740 |
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Licensing
[edit]This file is licensed under the Creative Commons Attribution 2.0 Generic license.
Attribution: Royal Institution of Cornwall
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File history
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 10:34, 17 December 2018 | 1,200 × 1,600 (727 KB) | Fæ (talk | contribs) | Portable Antiquities Scheme, CORN, FindID: 837087, mesolithic, page 2068, batch count 15431 |
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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 | 10/3,043 sec (0.0032862306933947) |
F-number | f/6.2 |
ISO speed rating | 100 |
Date and time of data generation | 17:18, 16 March 2017 |
Lens focal length | 29.5 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 | 16:43, 16 March 2017 |
Y and C positioning | Co-sited |
Exposure Program | Normal program |
Exif version | 2.2 |
Date and time of digitizing | 17:18, 16 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 | 142 mm |
Scene capture type | Standard |
Scene control | None |
Contrast | Normal |
Saturation | Normal |
Sharpness | Normal |
Subject distance range | Unknown |