The BGS Lexicon of Named Rock Units — Result Details
Bin Down Formation
| Computer Code: | BIN | Preferred Map Code: | Bin |
|---|---|---|---|
| Status Code: | Full | ||
| Age range: | Pragian Age (DP) — Pragian Age (DP) | ||
| Lithological Description: | Grey slaty mudstone and quartzitic sandstone with interbedded, apparently extensively silicified basic lava and volcaniclastic rocks. | ||
| Definition of Lower Boundary: | Faulted off against purple and green mudstone of the Whitsand Bay Formation. | ||
| Definition of Upper Boundary: | Grey slaty mudstone passing up into purple and green slaty mudstone of the Whitsand Bay Formation. | ||
| Thickness: | 300m | ||
| Geographical Limits: | Geological sheet 348 (not mapped elsewhere). | ||
| Parent Unit: | Dartmouth Group (DRTM) | ||
| Previous Name(s): | Dartmouth Slates [Obsolete Name And Code]
(DTMS)
Dartmouth Group (DRTM) |
||
| Alternative Name(s): | none recorded or not applicable | ||
| Stratotypes: | |||
| Partial Type Section | Widegates Borehole SX25NE/1, 400m at 074 degrees from Bray House. | ||
| Reference(s): | |||
| Ussher, W A E. 1891. The Devonian Rocks as described by De La Beche, etc. Transactions of the Royal Geological Society of Cornwall, Vol.II, 273-326. | |||
| Sedgwick, A, 1852. On the slate rocks of Devon and Cornwall, Quarterly Journal of the Geological Society, Vol.8, 1-19. | |||
| Leveridge B E, Holder, M T, Goode, A J J, Scrivener R C, Jones N S and Merriman, R J. 2002. Geology of the Plymouth and south-east Cornwall area. Memoir of the British Geological Survey, Sheet 348 (England and Wales). | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| E348 | |||