| P number: | P528013 |
|---|---|
| Caption: | Photomicrograph of colomite. Light: XPL. Magnification: x2.5. South side of railway, 400 yards west of Carham station, Roxburghshire, Scotland. |
| Description: | Pale cream, compact, very fine-grained dolomite with small-scale nodular structure. This specimen is Calciferous Sandstone Series (Carboniferous) in age. BGS sample number SL 221. British Geological Survey Petrology Collection sample number S 35075. Photomicrograph details: Light: XPL, Magnification: x2.5. The rock is composed of small, occasionally rhomboid grains (0.02-0.04 mm grainsize) of dolomite, probably coated with some argillaceous matter. The nodular structure is not seen in thin section but there is a weak banding of clearer and more turbid dolomite. The rock is cut by calcite-filled fractures which are faulted by narrow fractures, also calcite-filled. Quartz grains, up to 0.5 mm long, are sparsely scattered through the rock. In summary, the rock is a micrograined dolomite, with a uniform granular texture. |
| Date taken: | Sun Jun 25 00:00:00 GMT 1905 |
| Photographer: | Unknown |
| Copyright statement: | Unknown |
| Orientation: | Landscape |
| Size: | 381.09 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 |
Loading...
Loading...
Reviews
There is currently no feedback