| P number: | P528010 |
|---|---|
| Caption: | Photomicrograph of limestone. Light: PPL. Magnification: x2.5. Muir Burn, 660 yards north-west of Liddelbank House, Roxburghshire, Scotland. |
| Description: | A granular dark brownish-grey limestone, showing small crinoid columnals. This specimen is Calciferous Sandstone Series (Carboniferous) in age. BGS sample number SL 203. British Geological Survey Petrology Collection sample number S 35063. Photomicrograph details: Light: PPL, Magnification: x2.5. The rock is composed of the debris of crinoid columnals, shells, ostracods, foraminifera, polyzoa and spines, the fine material being recrystallized to clear fine-grained calcite in which the polyzoan and foraminiferal fragments are prominently picked out by opaque bituminous impregnations in the cell walls. Angular grains of quartz up to 0.5 mm long, are abundant throughout the rock. The sample is a fine-grained, arenaceous limestone which is microfossiliferous. |
| Date taken: | Sun Jun 25 00:00:00 GMT 1905 |
| Photographer: | Unknown |
| Copyright statement: | Unknown |
| Orientation: | Landscape |
| Size: | 358.45 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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