File:Probable Drilled Stone Bead (FindID 495393).jpg
Original file (9,329 × 4,741 pixels, file size: 2.78 MB, MIME type: image/jpeg)
Captions
Summary
editProbable Drilled Stone Bead | |||
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Photographer |
Cambridgeshire County Council, Helen Fowler, 2012-03-23 10:32:16 |
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Title |
Probable Drilled Stone Bead |
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Description |
English: An oval shaped stone with a flattened base, that has a roughly circular perforation through the centre. The perforation is set at 90 degrees from the flattened base and has a diameter of 4.68mm. The stone weighs 3.68g, has an oval diameter of 17.63mm x 14.46mm and height of 13.94mm.
Discussion: Stones can have naturally occurring cylindrical perforations if the stone has formed around another item such as Belamite fossils. The stone can then be eroded and weathered into pebbles that fortuitously resemble beads and therefore makes identification difficult. Dr Kevin Leahy identifies this find type as the remains of fossilised sponges. These small perforated sponges are known as Porosphaera. This identification has been confirmed by Mr Paul Ensom, formally of the Natural History Museum. Kenneth Oakley's paper on the 'Folklore of fossils' published in an early volume of 'Antiquity' discuss the use of these fossils as beads during the early Bronze Age. It is impossible to tell if a Porosphaera fossil has been used as a bead unless it was found in an archaeological context or had been modified in some way. The assumption must be that stray finds are natural. See PAS record CAM-127600, CAM-3BF965 & DEN0-26AB57. |
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Depicted place | (County of findspot) City of Peterborough | ||
Date |
Unknown date Unknown date |
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Accession number |
FindID: 495393 Old ref: CAM-C4EBB3 Filename: CAM-C4EBB3.jpg |
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Credit line |
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Source |
https://finds.org.uk/database/ajax/download/id/375269 Catalog: https://finds.org.uk/database/images/image/id/375269/recordtype/artefacts Artefact: https://finds.org.uk/database/artefacts/record/id/495393 |
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Permission (Reusing this file) |
Attribution-ShareAlike License version 4.0 (verified 2 December 2020) |
Licensing
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File history
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 03:56, 3 February 2017 | 9,329 × 4,741 (2.78 MB) | Fæ (talk | contribs) | Portable Antiquities Scheme, CAM, FindID: 495393, unknown, page 6137, batch primary count 30869 |
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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 | Canon |
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Camera model | Canon EOS 500D |
Exposure time | 1/125 sec (0.008) |
F-number | f/8 |
ISO speed rating | 1,600 |
Date and time of data generation | 10:08, 8 March 2012 |
Lens focal length | 55 mm |
Orientation | Normal |
Horizontal resolution | 72 dpi |
Vertical resolution | 72 dpi |
Software used | Adobe Photoshop CS2 Windows |
File change date and time | 16:15, 8 March 2012 |
White point chromaticity |
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Chromaticities of primarities |
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Color space transformation matrix coefficients |
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Y and C positioning | Co-sited |
Exposure Program | Manual |
Exif version | 2.21 |
Date and time of digitizing | 10:08, 8 March 2012 |
Meaning of each component |
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APEX shutter speed | 7 |
APEX aperture | 6 |
APEX exposure bias | 0 |
Metering mode | Pattern |
Flash | Flash fired, compulsory flash firing |
DateTime subseconds | 23 |
DateTimeOriginal subseconds | 23 |
DateTimeDigitized subseconds | 23 |
Supported Flashpix version | 1 |
Color space | Uncalibrated |
Focal plane X resolution | 5,315.4362416107 |
Focal plane Y resolution | 5,342.3271500843 |
Focal plane resolution unit | inches |
Custom image processing | Normal process |
Exposure mode | Manual exposure |
White balance | Auto white balance |
Scene capture type | Standard |
GPS tag version | 0.0.2.2 |
Supported Flashpix version | 1 |
Image width | 9,329 px |
Image height | 4,741 px |
Date metadata was last modified | 16:15, 8 March 2012 |
IIM version | 2 |