| P number: | P519813 |
|---|---|
| Caption: | Map showing the slate belts of Scotland. 1944, Scotland |
| Description: | The belts of true slate in the Highlands all fall within the subdivision of that regional known as the Grampian Highlands. Other 'slates' have been worked for roofing purposes such as the hard shales that occur in the post-Cambrian (Ordovician and Silurian) rocks of the Southern Uplands of Scotland, at Stobo Quarry in Peeblesshire and various other localities. They, however, are not true slates. They do not possess slaty cleavage, but owe their fissility simply to original bedding. Thinly splitting flagstones of Old Red Sandstone age occurring in Angus, Caithness and Orkney were also used at one time for roofing purposes, but, like the shales of the Southern Uplands, they owe their fissility to bedding. The specimen is of Precambrian, Dalradian age. The main slate belts of the Grampian Highlands are as follows: (1) Ballachulish belts extending from the quarries around Ballachulish, on the south side of Loch Leven, south-westwards for 6 miles as well as north-east of the loch, and from the North Ballachulish quarry, 1.5 miles east of Onich, north-eastwards for 7.5 miles almost to Glen Nevis. The group of slate rocks concerned is termed by geologists the Ballachulish Slates. (2) Easdale belt extending north of Jura through the islands of Scarba, Belnahua, Luing, Shuna and Easdale to Seil, and northwards to Oban, a distance of 20 miles. This group is termed the Easdale Slates. (3) Highland Border belt extending on the north-western (Highlands) side of the great Highland Boundary Fault from the north of the Island of Arran, north-eastwards through the Island of Bute, across Loch Lomond at Luss, and past Aberfoyle, Comrie and Logiealmond (Craiglea Quarry) to Dunkeld, with an extension farther east-north-east that reaches the east coast to the north of Stonehaven. This group is termed the Aberfoyle Slates. |
| Date taken: | Wed Jan 01 00:00:00 GMT 2003 |
| Photographer: | Bain, T.S. |
| Copyright statement: | NERC |
| Orientation: | Portrait |
| Size: | 154.84 KB; 664 x 1000 pixels; 56 x 85 mm (print at 300 DPI); 176 x 265 mm (screen at 96 DPI); |
| Average Rating: | Not yet rated |
| Categories: | Unsorted Images |
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