The BGS Lexicon of Named Rock Units — Result Details
Lochaline White Sandstone Formation
| Computer Code: | LAWS | Preferred Map Code: | LAWS |
|---|---|---|---|
| Status Code: | Full | ||
| Age range: | Turonian Age (KT) — Santonian Age (KS) | ||
| Lithological Description: | Very pure white to pale yellow-brown well-sorted medium-grained quartz sandstone. Massive with laminated and shelly beds to base. Most comprehensively described by Humphries (1961) at its type-site. | ||
| Definition of Lower Boundary: | The lower boundary is conformable (?) on the Morvern Greensand Formation, at the change from glauconitic calcareous sandstones upward into pure white quartz sandstone. | ||
| Definition of Upper Boundary: | The upper boundary is unconformable beneath the Gribun Chalk Formation or Coire Riabhach Phosphatic Formation. At the upward change from pure quartz sandstone into hard chalk or glauconitic sand with phosphatic nodules. | ||
| Thickness: | Up to 40 feet (12.2m) on the west side of Loch Aline, according to Humphries (1961). | ||
| Geographical Limits: | Known from the Morvern district and the Isle of Mull. | ||
| Parent Unit: | Inner Hebrides Group (IHEB) | ||
| Previous Name(s): | Loch Aline White Sandstone [Obsolete Name and Code: Use LAWS]
(-4144)
Loch Aline Glass Sand [Obsolete Name and Code: Use LAWS] (-354) Loch Aline Sandstone [Obsolete Name and Code: Use LAWS] (-2890) White Sandstone [Obsolete Name and Code: Use LAWS, ESA] (-235) |
||
| Alternative Name(s): | none recorded or not applicable | ||
| Stratotypes: | |||
| Type Section | Lochaline Mine adit section, Morvern. See Braley (1990) and Mortimore et al. (2001) for detailed successions at widely spaced exposures in western Scotland and adjacent islands. | ||
| Reference Section | One of three sections given in Braley (1990) at waterfalls around Loch Aline, Morvern district. See Braley (1990) and Mortimore et al. (2001) for detailed successions at widely spaced exposures in western Scotland and adjacent islands. | ||
| Reference Section | One of three sections given in Braley (1990) at waterfalls around Loch Aline, Morvern district. See Braley (1990) and Mortimore et al. (2001) for detailed successions at widely spaced exposures in western Scotland and adjacent islands. | ||
| Reference Section | Beinn Iadain in the Morvern district. See Braley (1990) and Mortimore et al. (2001) for detailed successions at widely spaced exposures in western Scotland and adjacent islands. | ||
| Reference Section | Alt na Teangaigh, Mull (Mortimore et al., 2001). See Braley (1990) and Mortimore et al. (2001) for detailed successions at widely spaced exposures in western Scotland and adjacent islands. | ||
| Reference Section | One of three sections given in Braley (1990) at waterfalls around Loch Aline, Morvern district. See Braley (1990) and Mortimore et al. (2001) for detailed successions at widely spaced exposures in western Scotland and adjacent islands. | ||
| Reference Section | Beinn Iadain, in the Morvern district. See Braley (1990) and Mortimore et al. (2001) for detailed successions at widely spaced exposures in western Scotland and adjacent islands. | ||
| Reference Section | Auchnacraig Cliff, Mull (Braley, 1990). See Braley (1990) and Mortimore et al. (2001) for detailed successions at widely spaced exposures in western Scotland and adjacent islands. | ||
| Reference(s): | |||
| Waters, C N, Gillespie, M R, Smith, K, Auton, C A, Floyd, J D, Leslie, A G, Millward, D, Mitchell, W I, McMillan, A A, Stone, P, Barron, A J M, Dean, M T, Hopson, P M, Krabbendam, M, Browne, M A E, Stephenson, D, Akhurst, M C, and Barnes, R P. 2007. Stratigraphical Chart of the United Kingdom: Northern Britain. (British Geological Survey.) | |||
| Braley, S M. 1990. The Sedimentology, Palaeoecology and Stratigraphy of Cretaceous Rocks in N.W. Scotland. Unpublished PhD Thesis CNAA, Polytechnic SouthWest (now University), Plymouth. | |||
| Lowden, B, Braley, S, Hurst, A and Lewis, J, 1992. Sedimentological studies of the Cretaceous Lochaline Sandstone, NW Scotland. 159-162 in Parnell, J (editor), Basins on the Atlantic Seaboard: Petroleum Geology, Sedimentology and Basin Evolution. Geological Society of London Special Publication, No.62. | |||
| Mortimore, R N, Wood, C J and Gallois, R W, 2001. British Upper Cretaceous Stratigraphy. Geological Conservation Review Series. No. 23. (Peterborough: Joint Nature Conservation Committee.) | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| S043 S044 | |||