File:Crescent blunted backed bladelet; 641.30 (FindID 505016).jpg
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Summary
editcrescent blunted backed bladelet; 641.30 | |||
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Photographer |
Copyright retained by illustrator, Graham Hill, 2012-05-29 12:44:33 |
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Title |
crescent blunted backed bladelet; 641.30 |
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Description |
English: A group of 9 or 10 microburins from a 2 hectare field amongst a total of 850 worked flint fragments including waste and utilised pieces and tools. The flints have individual GPS records to a few metres accuracy which form a cluster extending beyond but centred in the field close to a brook at the edge of its flat alluvial plain and slightly above. The flints form a broad funnel to a crossing point and continue less frequently on the other side. There is no modern obvious preferential ford but fallen branches make natural bridges and a particular one may have begun a tradition and a path beaten to it may have been maintained long after it had rotted. The find rate was 30-50 flints per hour and compares with a background expectation of one tenth of this and a few scatters exceeding ten times this field. The first search was on an unequally visible surface with patchy weed cover and manuring. It was fortunate that this was ploughed in and heavy rain shortly allowed a more equal search. The maps have necessarily not been included in this entry but the data is available on request. The field overlies mylor slate and there are many fragments with the associated vein quartz. There is also much granite from the nearby intrusion and up to boulder size greenstone or lava which also occurrs nearby. Most of this material must be here naturally. There were only a couple of possibly ground pieces so intense dwelling or settlement is not suggested. There was no unusual coloured sediment or prehistoric pottery found so there are no erosion of archaeology issues at this time.The microburins comprise the proximal ends of small blades. Some have a simple snap and may be confused in this case with production of Neolithic blades, which also occurrs in this scatter. Others are classic Mesolithic attributions with snapped through notches. 641.6 bears close comparison with CORN-F892A-7 as an example of controlled heat treated flint.The 99 cores on site; some of them small and bladelet producing are likely sourced from Marazion beach; 5km away and some further. Nearby Clodgy Moor included a backed bladelet of Mesolithic type with remaining nodular cortex and hence sourced from Devon or further afield. Included in the illustration is a single but fine crescent backed bladelet. Although the sample is small there appears to be a low ratio of backed bladelets to microburins here. There is illustrated a selection of Mesolithic blades showing controlled repetitious blade scars on the dorsal surface and often another truncated set at a slight angle. 641.11 and 641.13 are examples of this. The finds at Carn Brea(Mercer, 1981) show that blade production was still important in the Neolithic. Some examples are included. 641.27 with its informal preparation from a large nodule is likely Neolithic or even Early Bronze Age. CORN-3A0FF2 accessess the cores from this scatter. CORN-4A1CE8 describes a selection of flint knives. CORN-4CC906 describes the scrapers and CORN-4E4372 miscellaneous tools. |
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Depicted place | (County of findspot) Cornwall | ||
Date | between 8300 BC and 4500 BC | ||
Accession number |
FindID: 505016 Old ref: PUBLIC-3C1831 Filename: DSCF0377.JPG |
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Credit line |
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Source |
https://finds.org.uk/database/ajax/download/id/383180 Catalog: https://finds.org.uk/database/images/image/id/383180/recordtype/artefacts archive copy at the Wayback Machine Artefact: https://finds.org.uk/database/artefacts/record/id/505016 |
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Permission (Reusing this file) |
Attribution-ShareAlike License | ||
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Licensing
editThis file is licensed under the Creative Commons Attribution-Share Alike 2.0 Generic license.
Attribution: The Portable Antiquities Scheme/ The Trustees of the British Museum
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- to share – to copy, distribute and transmit the work
- to remix – to adapt the work
- Under the following conditions:
- attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
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File history
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 19:06, 24 January 2017 | 571 × 1,150 (197 KB) | Fæ (talk | contribs) | Portable Antiquities Scheme, PUBLIC, FindID: 505016, mesolithic, page 531, batch count 2199 |
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File usage on Commons
The following 6 pages use this file:
- File:Crescent blunted backed bladelet; 641.30 (FindID 505016).jpg
- File:Mesolithic blades with oblique truncated dorsal scars (FindID 505016).jpg
- File:Microburin of heat treated flint; 641.6 (FindID 505016).jpg
- File:Microburins, backed bladelet and mostly Mesolithic blades (FindID 505016).jpg
- File:Microburins; bottom row are simple snaps (FindID 505016).jpg
- File:Neolithic or Bronze Age blade; 641.27 (FindID 505016).jpg
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 | FUJIFILM |
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Camera model | Fujifilm A170 A180 |
Exposure time | 1/350 sec (0.0028571428571429) |
F-number | f/5.5 |
ISO speed rating | 100 |
Date and time of data generation | 20:10, 15 July 2010 |
Lens focal length | 5.7 mm |
Orientation | Normal |
Software used | Digital Camera Fujifilm A170 A180 Ver1.02 |
File change date and time | 20:10, 15 July 2010 |
Y and C positioning | Co-sited |
Exposure Program | Normal program |
Exif version | 2.2 |
Date and time of digitizing | 20:10, 15 July 2010 |
Meaning of each component |
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Image compression mode | 2 |
APEX shutter speed | 8.5 |
APEX aperture | 4.91 |
APEX brightness | 9.17 |
APEX exposure bias | 0 |
Maximum land aperture | 3.07 APEX (f/2.9) |
Metering mode | Pattern |
Light source | Unknown |
Flash | Flash did not fire, compulsory flash suppression |
DateTimeOriginal subseconds | 00 |
DateTimeDigitized subseconds | 00 |
Supported Flashpix version | 1 |
Color space | sRGB |
Focal plane X resolution | 5,952 |
Focal plane Y resolution | 5,952 |
Focal plane resolution unit | 3 |
Sensing method | One-chip color area sensor |
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 |
Scene capture type | Standard |
Sharpness | Normal |
Subject distance range | Unknown |