Diatomaceous deposits in Skye
| Autor: | W. Iveson Macadam, J.S. Grant Wilson |
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| Rok vydání: | 1887 |
| Předmět: | |
| Zdroj: | Transactions of the Edinburgh Geological Society. 5:318-326 |
| ISSN: | 2052-9414 0371-6260 |
| DOI: | 10.1144/transed.5.2.318 |
| Popis: | Part I.—Descriptive. I. Loch Cuithir (Quire). — 1. Topography. — The north end of Skye is divided into two nearly equal portions by a well-marked range of hills which trend north and south. The Sgurr Mhor terminates this ridge on the north, while southwards from this point it presents a very bold escarpment to the east, and includes, among numerous picturesque rock masses, the famous Quirang. This escarpment is almost entirely composed of beds of basalt and volcanic ash dipping gently to the west. On the north-east side of Creag-a-Lain the basaltic cliffs have succumbed more rapidly to the various denuding agencies that have been at work, and the result has been the production of a magnificent ‶corrie″ almost circular in form. In this corrie has been found the largest deposit of diatomite as yet discovered in Skye. The sides of the rock basin are from 15 to 20 feet above the level of the water, and everywhere the slope is steep, and appears to be entirely composed of basalt. The total area of the swamp and tarn, calculated from the ordnance 6-inch scale, is about 24 acres. In order to form an approximate idea of the thickness of the diatomite over the area, a borer 12 feet in length was used, and at the bottom of several of the bores an 18-foot iron rod was inserted, and in one case only did it touch the bottom; over portion of the marsh ground, it was impossible to put down any |
| Databáze: | OpenAIRE |
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