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|Scottish Gaelic name||Na Torrain|
|Meaning of name||"loud murmering or thunder"|
Torran Rocks within Argyll and Bute
|OS grid reference|
|Highest elevation||c. 10 m (33 ft)|
|Sovereign state||United Kingdom|
|Council area||Argyll and Bute|
The main rocks are Dearg Sgeir, MacPhail's Anvil, Na Torrain, Torran Sgoilte and Torr an t-Saothaid although there are numerous others including the southernmost of Sgeir Dhoirbh (or Otter Rock). They cover an area of about 25 km2 (10 sq mi) some 3 km (2 mi) south of the tidal island of Erraid and the Ross of Mull. The largest islets of Na Torrain reach 10 metres (33 ft) or more above sea level and are up to 150 m (490 ft) long. West Reef is made up of half a dozen skerries of orthogneiss about 2 km (1+1⁄4 mi) west of Na Torrain. The southern group of rocks and Ruadh Sgeir are formed from potassium-feldspar-phyric monzogranite intruded as part of the Caledonian Igneous Supersuite towards the end of the Caledonian orogeny (late Silurian to early Devonian period) and form an outlying part of the Ross of Mull pluton. Dearg Sgeir and Torr an t-Saothaid are monzogranite to granodiorite and hybridised with diorite enclaves. Na Torrain and McPhail's Anvil are formed from equigranular biotite monzogranite.
In addition to being a hazard to navigation, they are one of the locations featured in the novel Kidnapped by Robert Louis Stevenson. It was in this "stoneyard" that Alan Breck Stewart and David Balfour were ship-wrecked. David Balfour, the hero of this tale was then marooned on neighbouring Erraid for a while. Stevenson's father, Thomas was the designer of Dubh Artach lighthouse, and the young Robert Louis knew the area well. He wrote of a "black brotherhood - the Torran reef that lies behind, between which and the shore the Iona Steamers" (taking visitors to Iona and Staffa) "have to pick their way on their return to Oban. The tourist on this trip can see upwards of 3 miles [5 kilometres] of ocean thickly sown with these fatal rocks, and the sea breaking white and heavy over some and others showing their dark heads threateningly above water".
This passage begs comparison with Kidnapped itself:
Altogether it was no such ill night to keep the seas in; and I had begun to wonder what it was that sat so heavily upon the captain, when the brig rising suddenly on the top of a high swell, he pointed and cried to us to look. Away on the lee bow, a thing like a fountain rose out of the moonlit sea, and immediately after we heard a low sound of roaring.
"What do ye call that?" asked the captain, gloomily.
"The sea breaking on a reef," said Alan. "And now ye ken where it is; and what better would ye have?"
"Ay," said Hoseason, "if it was the only one."
And sure enough, just as he spoke there came a second fountain farther to the south.
"There!" said Hoseason. "Ye see for yourself. If I had kent of these reefs, if I had had a chart, or if Shuan had been spared, it's not sixty guineas, no, nor six hundred, would have made me risk my brig in sic a stoneyard! But you, sir, that was to pilot us, have ye never a word?"
"I'm thinking," said Alan, "these'll be what they call the Torran Rocks."
"Are there many of them?" says the captain.
"Truly, sir, I am nae pilot," said Alan; "but it sticks in my mind there are ten miles [16 km] of them."
Mr. Riach and the captain looked at each other.
"There's a way through them, I suppose?" said the captain.
"Doubtless," said Alan, "but where? But it somehow runs in my mind once more that it is clearer under the land."
- Haswell-Smith (2004) p. 94
- "Get-a-Map". Ordnance Survey. Retrieved 9 December 2009.
- "Otter Rock" Gazetteer for Scotland. Retrieved 13 December 2009.
- Murray (1973) p. 108 states that there are 30 all told.
- Ross of Mull, Scotland sheet 43S Solid and Drift geology (Map) (Provisional ed.). 1:50,000. British Geological Survey. 1999. ISBN 9780751829358.
- Bathhust (2000) p. 224
- Stevenson (1995) p. 4.
- Nicholson (1995) p. 147
- Nicholson (1995) p. 146
- Bathhust (2000) p. 225, possibly quoting Thomas Stevenson.
- Stevenson, R.L. (1988 - first published 1883). Kidnapped. Edinburgh. Canongate.
- Bathhurst, Bella. (2000) The Lighthouse Stevensons. London. Flamingo.
- See Stevenson (1887)
- Stevenson (1995) p. 1
- Iain Mac an Tàilleir. "Placenames" (PDF). Pàrlamaid na h-Alba. Archived from the original (PDF) on 29 May 2008. Retrieved 13 December 2009.
- Bathhurst, Bella (2000) The Lighthouse Stevensons. London. Flamingo.
- Haswell-Smith, Hamish (2004). The Scottish Islands. Edinburgh: Canongate. ISBN 978-1-84195-454-7.
- Murray, W.H. (1966) The Hebrides. London. Heinemann.
- Nicholson, Christopher. (1995) Rock Lighthouses of Britain: The End of an Era? Caithness. Whittles.?
- Stevenson, Robert Louis (1887) Memories and Portraits. Chatto and Windus. Reprinted by 1st World Publishing, 2004.
- Stevenson, Robert Louis (1995) The New Lighthouse on the Dhu Heartach Rock, Argyllshire. California. Silverado Museum. Based on an 1872 manuscript and edited by Swearingen, R.G.
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