| P number: | P552769 |
|---|---|
| Caption: | Castlecary Limestone, upper leaf. Black Devon at North Shaw Wood, 1.5 miles west of Saline. Fife Region. |
| Description: | Pale bluish-grey, dull, compact dolomite. It is composed of dolomitized fragments of large shells in a matrix of dolomite-quartz sandstone. The shells show so sharp a difference in coarseness of dolomite recrystallization, 0.2 mm grain size, from that of the matrix 0.04 mm, that they may represent a period of dolomitization prior to their accumulation as detrital grains in the present sediment. Some of the fragments look like dolomite-rock rather than shells. The matrix is composed of granular dolomite without rhomboid shape, small and angular grains of quartz, many streaks of dark material, probably de composed rock or feldspar, abundant pyrite and some pyritized carbonaceous material. The dolomite is ankeritic with omega varying about 1.700 and reaching 1.712, the higher values being shown by the coarser clear carbonate. Ferriferous dolomite, arenaceous, zoichnic, taxichnic. SL0115. Britrocks S34588. Magnification x40. Light XPL. |
| Date taken: | Wed Jan 21 00:00:00 GMT 2004 |
| Photographer: | Sutherland, A. |
| Copyright statement: | NERC |
| Additional information: | Description from: Limestones of Scotland: chemical analyses and petrography. Edinburgh : HMSO, 1956. |
| Orientation: | Landscape |
| Size: | 304.26 KB; 1000 x 750 pixels; 85 x 64 mm (print at 300 DPI); 265 x 198 mm (screen at 96 DPI); |
| Average Rating: | Not yet rated |
| Categories: | Unsorted Images |
Loading...
Loading...
Reviews
There is currently no feedback