The BGS Lexicon of Named Rock Units — Result Details
Delabole Member
| Computer Code: | DLBS | Preferred Map Code: | DlbM |
|---|---|---|---|
| Status Code: | Full | ||
| Age range: | Famennian Age (DA) — Famennian Age (DA) | ||
| Lithological Description: | Bluish grey slate within the Tredorn Slate Formation. | ||
| Definition of Lower Boundary: | Gradational with the Tredorn Slate Formation. | ||
| Definition of Upper Boundary: | Gradational with the Tredorn Slate Formation. | ||
| Thickness: | 30 to 50m (estimated structural thickness). | ||
| Geographical Limits: | Isolated exposures in the vicinity of Delabole village, north Cornwall. | ||
| Parent Unit: | Tredorn Slate Formation (TSL) | ||
| Previous Name(s): | Delabole Slates [Obsolete Name and Code: Use UDSL, TVY, DLBS, TSL]
(-3996)
Penpethy Beds [Obsolete Name and Code: Use DLBS, TVY] (-2152) |
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| Alternative Name(s): | Lower Delabole Slates [Obsolete] |
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| Stratotypes: | |||
| Type Section | Delabole Slate Quarry, lowest part. Selwood, E B, et al, 1998. | ||
| Reference(s): | |||
| Selwood, E B, Thomas, J M, Williams, B J, Clayton, R, Durning, B, Smith, O and Warr, L N, 1998. Geology of the country around Trevose Head and Camelford. Memoir of the British Geological Survey, sheets 335 and 336 (England and Wales). | |||
| Dewey, H, 1909. On Overthrusts at Tintagel (North Cornwall). Quarterly Journal of the Geological Society, Vol.65, 265-280. | |||
| Parkinson, J, 1903. On the geology of the Tintagel and Davidstow district, Quarterly Journal of the Geological Society,Vol.59,408-421. | |||
| Freshney, E C, McKeown, M C and Williams, M. 1972. Geology of the coast between Tintagel and Bude. Memoir of the Geological Survey of Great Britain, part of sheet 322 (England and Wales). | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| E336 | |||