File:Mesolithic microburins. (FindID 123736).jpg
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Summary
[edit]Mesolithic microburins. | |||
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Photographer |
Birmingham Museums Trust, Caroline Johnson, 2006-02-24 14:45:56 |
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Title |
Mesolithic microburins. |
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Description |
English: A collection of three knapped microburins, dating to the Mesolithic period between c. 8000 BC - c. 4000 BC (length ranging from 11-21mm; average thickness: 3mm; collective weight: 1.74g). A bulb of percussion and ripples or 'lunettes' are visible on the ventral (lower face) side of the largest piece. Multiple arrises are on all but one piece, with normally 2-4 arrises on the dorsal (upper face) side. In his 2004 publication 'Guide to the Identification, Assessment and Recording of Lithics October 2004, Version 1',page 209, C J Bond describes microburins as 'a by-product of the manufacture of microliths, formed by working a notch into the edge of a blade by an anvil technique. This process will then cause the blade to break obliquely, giving a microburin with a pointed break, 'piquant triedre'. The diagnostic feature is the burin notch or 'facet'. This technology occurs throughout the Mesolithic. However, in the Later Mesolithic with the reduction in blades and bladelets, this determines that the microburin is also reduced in size'. |
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Depicted place | (County of findspot) Dudley | ||
Date | between 8000 BC and 4000 BC | ||
Accession number |
FindID: 123736 Old ref: WMID-F084B0 Filename: WMID-F084B0.JPG |
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Credit line |
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Source |
https://finds.org.uk/database/ajax/download/id/93482 Catalog: https://finds.org.uk/database/images/image/id/93482/recordtype/artefacts archive copy at the Wayback Machine Artefact: https://finds.org.uk/database/artefacts/record/id/123736 |
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Permission (Reusing this file) |
Attribution-ShareAlike License version 4.0 (verified 30 November 2020) |
Licensing
[edit]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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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 17:35, 5 February 2017 | 1,086 × 766 (89 KB) | Fæ (talk | contribs) | Portable Antiquities Scheme, WMID, FindID: 123736, mesolithic, page 4561, batch direction-asc count 62158 |
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Camera manufacturer | NIKON |
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Camera model | E4500 |
Exposure time | 10/603 sec (0.016583747927032) |
F-number | f/4.8 |
ISO speed rating | 100 |
Date and time of data generation | Unknown date |
Lens focal length | 29.3 mm |
Orientation | Normal |
Horizontal resolution | 300 dpi |
Vertical resolution | 300 dpi |
Software used | E4500v1.2 |
File change date and time | Unknown date |
Y and C positioning | Co-sited |
Exposure Program | Normal program |
Exif version | 2.2 |
Date and time of digitizing | Unknown date |
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 | Pattern |
Light source | Unknown |
Flash | Flash fired, auto mode |
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 | Auto white balance |
Digital zoom ratio | 0 |
Focal length in 35 mm film | 141 mm |
Scene capture type | Standard |
Scene control | None |
Contrast | Normal |
Saturation | Normal |
Sharpness | Normal |
Subject distance range | Unknown |