The BGS Lexicon of Named Rock Units — Result Details
Salterella Grit Member
Computer Code: | SGQ | Preferred Map Code: | notEntered |
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Status Code: | Full | ||
Age range: | Comley Series (EC) — Comley Series (EC) | ||
Lithological Description: | White quartz arenite and quartzite, characterised by small conical Salterella shells. | ||
Definition of Lower Boundary: | Conformably overlies the Fucoid Beds Member of the An t-Sron Formation. | ||
Definition of Upper Boundary: | Conformably overlain by dark grey dolostones of the Ghrudaidh Formation of the Durness Group. | ||
Thickness: | Up to 20 m thick, but generally less than 15 m thickness. | ||
Geographical Limits: | The An t-Sron Formation, including the Salterella Grit Member, forms a narrow, discontinuous belt, extending along the North-western side of Scotland from the Durness-Eriboll area, through Assynt, Dundonnell, Kinlochewe and Kishorn, to Skye. | ||
Parent Unit: | An T-Sron Formation (ASR) | ||
Previous Name(s): | Salterella Grit or Quartzite [Obsolete Name and Code: Use SGQ, SLGT]
(-1815)
Serpulite Grit Member [Obsolete Name And Code: Use SGQ] (SLGT) Salterella Grit [Obsolete Name and Code: Use SGQ] (-4880) Salterella Grit Formation [Obsolete Name and Code: Use SGQ] (-2417) Serpulite Grit [Obsolete Name and Code: Use SGQ] (-2418) |
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Alternative Name(s): | none recorded or not applicable | ||
Stratotypes: | |||
Reference Section | Skiag Bridge by Loch Assynt displays a good reference section through the Salterella Grit Member. Peach et al., 1907. | ||
Type Area | An T-Stron headland on east shore of Loch Eriboll, Durness area, north coast of Scotland. Peach et al., 1907; Prigmore and Rushton, 1999. | ||
Reference(s): | |||
Peach, B N, Home, J, Gunn, W, Clough, C T and Hinxman, L W, 1907. The Geological Structure of the northwest Highlands of Scotland. Memoir of the Geological Survey of Great Britain. | |||
Johnson, M R W and Parsons I. 2000. Macgregor and Phemister's geological excursion guide to the Assynt district of Scotland. (Edinburgh Geological Society.) | |||
Phemister, J. 1948. British Regional Geology: Scotland: the Northern Highlands (2nd edition) (Edinburgh: HSMO for the Geological Survey and Museum.) | |||
Wright, D T and Knight, I. 1995. A revised chronostratigraphy for the lower Durness Group. Scottish Journal of Geology, Vol. 31, 11-22. | |||
Johnston, G S and Mykura, W. 1989. British regional geology: the Northern Highlands (4th edition) (London: HMSO for the British Geological Survey.) | |||
Park, E G, Stewart, A D and Wright, D T. 2002. The Hebredean Terrane. 45-80 in the Geology of Scotland. Trewin, N H (Editor). (The Geological Society, London.) | |||
Prigmore, J K, and Rushton, A W A. 1999. Scotland: Cambrian and Ordovician of the Hebridean Terrane. 295-315 in British Cambrian to Ordovician Stratigraphy. Rushton, A W A, Owen, A W, Owens, R M and Prigmore, J K (editors). Geological Conservation Review Series. (Joint Nature Conservation Committee.) | |||
Cowie, J W. 1974. The Cambrian of Spitsbergen and Scotland. 123-155 in Cambrian of the British Isles, Norden and Spitsbergen, Holland, C H (editor). Lower Palaeozoic Rocks of the World, Vol. 2. (John Wiley and Sons.) | |||
Holland, C H (Editor). Lower Palaeozoic Rocks of the World, Vol.2. (John Wiley & Sons.) | |||
1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
S114 S071 S108 S081 S082 S092 S092 S101 S102 S107 |