| P number: | P527694 |
|---|---|
| Caption: | Quartz from a quartz vein, A' Bhuidheanach, Dalwhinnie, Invernessshire. |
| Description: | A specimen of quartz from a thick quartz vein that occurs at the head of an unnamed stream three-quarters of a mile north by east of A' Bhuidheanach, Dalwhinnie, Invernessshire. British Geological Survey Petrology Collection sample number MC 7471. The quartz vein form a dyke-like reef 85 feet wide and consists of very pure quartz, uniform throughout except for one or two very thin impersistent veins of feldspar near the western margin. High grade silica rock was in demand for the manufacture of silica refractories, however, vein -quartz was thought to be unsuitable due to its matrix of pure silica. In addition to vein-quartz Other high grade silica refractories are quartzites and highly siliceous sandstones. |
| Date taken: | Sun Jun 25 00:00:00 GMT 1905 |
| Photographer: | Unknown |
| Copyright statement: | Unknown |
| Orientation: | Landscape |
| Size: | 120.17 KB; 1000 x 665 pixels; 85 x 56 mm (print at 300 DPI); 265 x 176 mm (screen at 96 DPI); |
| Average Rating: | Not yet rated |
| Categories: | Unsorted Images |
Loading...
Loading...
Reviews
There is currently no feedback