| Torridon Group | |
|---|---|
| Stratigraphic range: 1000-960 Ma | |
| Thickness | 4,000–6,000 m |
| Lithology | |
| Primary | Sandstone |
| Other | Conglomerate, breccia, shale |
| Location | |
| Country | Scotland, United Kingdom |
| Type section | |
| Named for | Loch Torridon |
The Torridon Group is a series of Tonian (lower Neoproterozoic) arenaceous and argillaceous sedimentary rocks, which occur extensively in the Northwest Highlands of Scotland. These strata are particularly well exposed in the district of upper Loch Torridon, a circumstance which suggested the name Torridon Sandstone, first applied to these rocks by James Nicol.[1] Stratigraphically, they lie unconformably on gneisses of the Lewisian complex and sandstones of the lithologically similar Mesoproterozoic Stoer Group and their outcrop extent is restricted to the Hebridean Terrane.[2]
- ^ One or more of the preceding sentences incorporates text from a publication now in the public domain: Howe, John Allen (1911). "Torridonian". In Chisholm, Hugh (ed.). Encyclopædia Britannica. Vol. 27 (11th ed.). Cambridge University Press. p. 62.
- ^ Park, R.G.; Stewart, A.D.; Wright, D.T. (2003). "3. The Hebridean terrane". In Trewin N.H. (ed.). The Geology of Scotland. London: Geological Society. pp. 45–61. ISBN 978-1-86239-126-0. Retrieved 23 June 2010.
