File:Microblade (left margin) (FindID 995391-1096937).jpg
Original file (1,200 × 1,600 pixels, file size: 639 KB, MIME type: image/jpeg)
Captions
Summary[edit]
microblade (left margin) | |||
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Photographer |
Royal Institution of Cornwall, Anna Tyacke, 2020-03-19 13:17:54 |
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Title |
microblade (left margin) |
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Description |
English: A flint micro-blade of the Mesolithic period 34 mm in length, 10.5 mm width and 3 mm in thickness. Both margins on the dorsal face are retouched to create the sharper edges. Part of the bulb of percussion remains on the ventral face at the proximal end with the resulting conchoidal ripples extending across the face to the opposite distal end. No cortex remains so this is a tertiary flake and may be a distance from where it was knapped as a product of the Mesolithic blade industry. The flint is pale grey with bands of darker grey flint so it has been derived from a local beach pebble.
Bond (2004) illustrates groups of very similar micro-blades from the earlier Mesolithic site at Thatcham, Berkshire on p.108, fig.5.92, nos.L49-L53 and the later Mesolithic site of Oakhanger, Hampshire on p.116, fig.5.100, nos.1-3. |
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Depicted place | (County of findspot) Devon | ||
Date | between 9000 BC and 4000 BC | ||
Accession number |
FindIdentifier: 995391 |
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Credit line |
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Source |
https://finds.org.uk/database/ajax/download/id/1096937 Catalog: https://finds.org.uk/database/images/image/id/1096937/recordtype/artefacts archive copy at the Wayback Machine Artefact: https://finds.org.uk/database/artefacts/record/id/995391 |
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Permission (Reusing this file) |
Attribution License version 2.0 (verified 13 November 2020) | ||
Other versions | FindID 995391 has multiple images: 1096935 1096936 1096937 search |
Object location | 50° 58′ 33.6″ N, 4° 29′ 08.95″ W | View this and other nearby images on: OpenStreetMap | 50.976000; -4.485820 |
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File history
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 11:19, 8 November 2020 | 1,200 × 1,600 (639 KB) | Fæ (talk | contribs) | Portable Antiquities Scheme, CORN, FindID: 995391-1096937, mesolithic, page 564, batch count 11151 |
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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 | 2/843 sec (0.0023724792408066) |
F-number | f/6.3 |
ISO speed rating | 100 |
Date and time of data generation | 13:18, 19 March 2020 |
Lens focal length | 24.9 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 | 13:06, 19 March 2020 |
Y and C positioning | Co-sited |
Exposure Program | Normal program |
Exif version | 2.2 |
Date and time of digitizing | 13:18, 19 March 2020 |
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 | Unknown |
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 | Auto white balance |
Digital zoom ratio | 0 |
Focal length in 35 mm film | 120 mm |
Scene capture type | Standard |
Scene control | None |
Contrast | Normal |
Saturation | Normal |
Sharpness | Normal |
Subject distance range | Unknown |