File:Neolithic leaf-shaped arrowhead (ventral) (FindID 176821).jpg
Original file (1,280 × 960 pixels, file size: 498 KB, MIME type: image/jpeg)
Captions
Summary
[edit]Neolithic leaf-shaped arrowhead (ventral) | |||
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Photographer |
Royal Institution of Cornwall, Anna Tyacke, 2007-04-18 23:35:57 |
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Title |
Neolithic leaf-shaped arrowhead (ventral) |
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Description |
English: Flint leaf-shaped arrowhead that has been bifacially reworked or retouched on the entire edge of both the dorsal and ventral faces. The reworking extends further onto the ventral surface from the proximal end of the right margin of the arrowhead, over the remains of the bulb of percussion. A fracture on the dorsal face, running at right angles to the medial ridge, towards the proximal end obstructs working in this area.
There is no cortex remaining on the flake and the flake would have been chosen particularly for an arrowhead as its medial ridge runs centrally, but at an angle, the length of the flake and will add strength to it, in use as well as in manufacture. This suggests it is a tertiary flake. The colour of the flint ranges from a dark grey to a light grey and the length to breadth ratio is about 1:1. Local leaf-shaped arrowheads were mass-produced from sites like Carn Brea from about 3800 BC, but this one may have been made earlier on the south coast from local beach pebbles. Bond (2004) illustrates a similar example on page 123, Fig.5.107, Type 4Ab, which he dates to the Earlier Neolithic, c.4000-3300 BC. |
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Depicted place | (County of findspot) Cornwall | ||
Date | between 4000 BC and 3300 BC | ||
Accession number |
FindID: 176821 Old ref: CORN-AD13D8 Filename: Aprilfinds 026.jpg |
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Credit line |
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Source |
https://finds.org.uk/database/ajax/download/id/135716 Catalog: https://finds.org.uk/database/images/image/id/135716/recordtype/artefacts archive copy at the Wayback Machine Artefact: https://finds.org.uk/database/artefacts/record/id/176821 |
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Permission (Reusing this file) |
Attribution-ShareAlike License version 4.0 (verified 26 November 2020) | ||
Other versions |
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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 | 08:19, 22 January 2017 | 1,280 × 960 (498 KB) | Fæ (talk | contribs) | Portable Antiquities Scheme, CORN, FindID: 176821, neolithic, page 122, batch count 2134 |
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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 | 10/271 sec (0.03690036900369) |
F-number | f/4.1 |
ISO speed rating | 100 |
Date and time of data generation | 16:28, 3 April 2007 |
Lens focal length | 22.8 mm |
Horizontal resolution | 300 dpi |
Vertical resolution | 300 dpi |
Software used | E4500v1.2 |
File change date and time | 16:28, 3 April 2007 |
Y and C positioning | Co-sited |
Exposure Program | Normal program |
Exif version | 2.2 |
Date and time of digitizing | 16:28, 3 April 2007 |
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 |