The BGS Lexicon of Named Rock Units — Result Details
Baronwood Sand and Gravel Formation
| Computer Code: | BWSG | Preferred Map Code: | Bw |
|---|---|---|---|
| Status Code: | Full | ||
| Age range: | Devensian Stage (QD) — Devensian Stage (QD) | ||
| Lithological Description: | Sand and gravel with clasts mainly derived from the Vale of Eden (including brown "Penrith" and red "St Bees" sandstones, Carboniferous limestone and yellow sandstones), the Lake District (including andesitic lavas and welded tuffs) and the Alston Block (sandstones and grit), but also with some granodiorite, granite and other rocks from the Galloway Hills. Deposits occur as fans, flat-topped plateaux, mounds, ridge systems and terraces. Fans and plateaux commonly include deltaic sequences that coarsen upwards from laminated silt and clay, through fine- and coarse-grained sand to cobble gravel. Ridge systems commonly includes core of cobble gravel partially overlain and surrounded by sand and gravel that fine upwards. Terraces are commonly underlain by dense gravel. All deposits include lenses of, and are locally capped by, red gravelly diamicton (flow till). | ||
| Definition of Lower Boundary: | Unconformable boundary with red diamicton of the Greystoke Till Formation below, or on bedrock. | ||
| Definition of Upper Boundary: | At surface or overlain unconformably by Flandrian sediments. | ||
| Thickness: | To 30m | ||
| Geographical Limits: | The Vale of Eden and the southern Solway Lowlands north of the 'Scottish Readvance' limit. | ||
| Parent Unit: | Central Cumbria Glacigenic Subgroup (CCGL) | ||
| Previous Name(s): | Glaciofluvial sand and gravel
(GFSG)
Glaciofluvial sand and gravel (GFSG) |
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| Alternative Name(s): | Baronwood Member |
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| Stratotypes: | |||
| Partial Type Section | Sections in former sand and gravel pit at Low Plains Farm, 6km west of Kirkoswald, Cumbria. Huddart (1981, 2002) | ||
| Partial Type Section | Sections in former sand and gravel pit at Baronwood Farm, 4km northwest Kirkoswald, Cumbria. Huddart (1981, 2002) | ||
| Reference(s): | |||
| Bowen, D Q. 1999. A revised correlation of Quaternary deposits in the British Isles. Geological Society Special Report, No. 23. | |||
| McMillan, A A, Hamblin, R J O, and Merritt, J W. 2011. A lithostratigraphical framework for onshore Quaternary and Neogene (Tertiary) superficial deposits of Great Britain and the Isle of Man. British Geological Survey Research Report, RR/10/03. 343pp. | |||
| Huddart, D. 1981. Fluvioglacial systems in Edenside. 81-103 in Field Guide to Eastern Cumbria. Boardman, J. (ed.). Quaternary Research Association, London. 128pp | |||
| Huddart, D and Glasser, N F (editors). 2002. Quaternary of Northern England. Geological Conservation Review Series, No.25. [Peterborough: Joint Nature Conservation Committee.] 745pp. | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| none recorded or not applicable | |||