| P number: | P531425 |
|---|---|
| Caption: | Photomicrograph of Lower Lias limestone. Light: XPL. Magnification: x2.5. Old quarry, 1100 yards south-east of Applecross House, Ross and Cromarty, Scotland. |
| Description: | A grey, compact oolitic limestone with a buff weathered crust. This specimen is Jurassic in age. BGS sample number SL 253. British Geological Survey Petrology Collection sample number S 35353. Photomicrograph details: Light: XPL, Magnification: x2.5. In thin section the ooliths are found to be 0.5-1.5 mm in diameter and frequently have as kernels irregular pieces of shell or echinodermal plate and spine and, less commonly, earlier ooliths with limonitized or pyritized borders. They are embedded in a very fine-grained matrix of calcite containing a few thin-walled microshells and scarce tiny grains of quartz. Subordinate detrital constituents include rolled shell fragments and rolled pebbles of oolite. In summary the sample is a micrograined oolitic limestone. |
| Date taken: | Sun Jun 25 00:00:00 GMT 1905 |
| Photographer: | Unknown |
| Copyright statement: | Unknown |
| Orientation: | Landscape |
| Size: | 347.81 KB; 1000 x 663 pixels; 85 x 56 mm (print at 300 DPI); 265 x 175 mm (screen at 96 DPI); |
| Average Rating: | Not yet rated |
| Categories: | Unsorted Images |
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