File:Muller (profile) (FindID 803243).jpg
Original file (1,600 × 1,200 pixels, file size: 765 KB, MIME type: image/jpeg)
Captions
Summary
[edit]muller (profile) | |||
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Photographer |
Royal Institution of Cornwall, Anna Tyacke, 2016-09-14 15:31:36 |
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Title |
muller (profile) |
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Description |
English: Fine-grained muscovite granite double-sided muller or rubbing stone. The muller is oval in plan, with one rounded complete end and one broken end, and flat in section. Both faces of the muller are flat and smooth as they were used for rubbing, but one side may have originally been convex so that it could be held and pushed across a base for grinding. The muller would have been used with a larger saddle quern to grind grain between the stones to make flour. The granite is fine grained and contains muscovite or mica, tourmaline and felspars (see report below). The soft felspars would work into hollows and the hard tourmaline would stand proud of the surface, thus allowing a shearing action to cut and grind the grain. The shape of the muller suggests that it was made from a beach cobble from the Land's End Granite outcrop.
Jones & Taylor (2010) illustrate a similar megacrystic granite muller with small quartz and feldspar megacrysts, which has been derived from a river cobble, excavated from Scarcewater, St Stephen, on page 127, fig.64, no.270, which is dated from the Middle Bronze Age, c.1500-1100 BC. Jones (2002) illustrates a similar example excavated from Callestick on page 29, fig.12, no.94 which dates from the Later Bronze Age, c.1100-700BC. Nowakowski (1991) illustrates a similar elvan example excavated from Trethellan on page 142, fig.57, no.88, which dates from the Middle Bronze Age, c.1500-1200 BC. |
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Depicted place | (County of findspot) Cornwall | ||
Date | between 2150 BC and 700 BC | ||
Accession number |
FindID: 803243 Old ref: CORN-186CD3 Filename: Sep16finds099.JPG |
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Credit line |
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Source |
https://finds.org.uk/database/ajax/download/id/582832 Catalog: https://finds.org.uk/database/images/image/id/582832/recordtype/artefacts archive copy at the Wayback Machine Artefact: https://finds.org.uk/database/artefacts/record/id/803243 |
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Permission (Reusing this file) |
Attribution License version 2.0 (verified 17 November 2020) |
Object location | 50° 07′ 35.04″ N, 5° 40′ 38.32″ W | View this and other nearby images on: OpenStreetMap | 50.126400; -5.677310 |
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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 | 02:37, 31 January 2019 | 1,600 × 1,200 (765 KB) | Fæ (talk | contribs) | Portable Antiquities Scheme, CORN, FindID: 803243, bronze age, page 3228, batch count 2893 |
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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 | 2/329 sec (0.0060790273556231) |
F-number | f/5.3 |
ISO speed rating | 100 |
Date and time of data generation | 14:45, 14 September 2016 |
Lens focal length | 7.85 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 | 15:18, 14 September 2016 |
Y and C positioning | Co-sited |
Exposure Program | Normal program |
Exif version | 2.2 |
Date and time of digitizing | 14:45, 14 September 2016 |
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 |
Custom image processing | Normal process |
Exposure mode | Auto exposure |
White balance | Manual white balance |
Digital zoom ratio | 0 |
Focal length in 35 mm film | 38 mm |
Scene capture type | Standard |
Scene control | None |
Contrast | Normal |
Saturation | Normal |
Sharpness | Normal |
Subject distance range | Unknown |