No CrossRef data available.
Article contents
On the Geology of the Scilly Isles
Published online by Cambridge University Press: 17 March 2016
Extract
The majority of persons, merely acquainted with the name and position of the Scilly Isles, generally associate in their mind with the mention of this group a cluster of rugged rocks, affording shelter and sustenance to a few poor fishermen and pilots, and famous for nothing else than the frequent shipwrecks and naval disasters of which in times past they have been the scene. From their isolated position, and their comparative difficulty of access, they have been much less frequently visited, and less accurately described, than many other of the beautiful islets which surround our favoured shores; hence much misapprehension prevails both as to their extent and their capabilities, while very little indeed, of a scientific character, has been put on record with reference to their varied attractions, zoological, botanical, or geological.
- Type
- Research Article
- Information
- Copyright
- Copyright © Cambridge University Press 1859
References
page 12 note * With the exception of an admirable paper read before the Geological Society of Cornwall, in Sept., 1850, by Joseph Carne, Esq., F.R.S., F.G.S., &c, and a few brief lines in one of the earlier volumes of the Transactions of that Society, I am not aware of any notices of the geology of these islands which have been offered to the public.
page 16 note * Mr. Douglass also informed me that, when lodging on Rosevear island, to superintend the works connected with the Bishop Lighthouse, he had known blocks of granite twenty tons in weight to be moved some distance by the sea.
page 23 note * The constituents of Felspar are, according to Rose, silica 65.91, alumina 21.00, lime or magnesia 0.11, potash 10.18, or soda 3.50. Those of Tourmaline, according to Rammelsberg, silica 37.80, lime or magnesia 1.42, alumina 30.56, soda 2.09, iron 0.50, or manganese 2.50, other substances 9.90. The iron might be procured from the mica, which contains from 4.56 to 27.06 of that metal, according to the analysis of Kobell and Turner.