The BGS Lexicon of Named Rock Units — Result Details
Roxby Formation
Computer Code: | ROX | Preferred Map Code: | RoF |
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Status Code: | Full | ||
Age range: | Guadalupian Epoch (PUG) — Early Triassic Epoch (TE) | ||
Lithological Description: | Mudstone and siltstone, reddish brown, with subordinate sandstone. Sulphates (gypsum, anhydrite) common towards base. | ||
Definition of Lower Boundary: | Diachronous; taken at top of highest anhydrite (Littlebeck Anhydrite) in subsurface, and at top of Brotherton Formation at outcrop. | ||
Definition of Upper Boundary: | Conformable; taken at gradational and diachronous transition into sandstones of Sherwood Sandstone Group. | ||
Thickness: | 0-130m (129m in Staithes S20 borehole - Smith et al, 1986). | ||
Geographical Limits: | Eastern England; dies out in south Nottinghamshire. | ||
Parent Unit: | Zechstein Group (ZG) | ||
Previous Name(s): | Saliferous Marl [Obsolete Name and Code: Use ROX]
(-4304)
Permian Upper Marls (A) [Obsolete Name And Code: Use ROX] (UPM) Permian Upper Marls (B) [Obsolete Name And Code: Use ROX] (PUM) Upper Marl [Obsolete Name and Code: Use ROX] (-2401) Permian Upper Marl (-503) Upper Permian Marl (-504) |
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Alternative Name(s): | none recorded or not applicable | ||
Stratotypes: | |||
Type Section | Staithes S20 borehole [NZ71ne/14], Boulby, Cleveland: depth range 920.5-1049.8m. Curated core held at BGS Keyworth. | ||
Reference(s): | |||
Smith, D B, Harwood, G M, Pattison, J and Pettigrew, T H. 1986. A revised nomenclature for Upper Permian strata in eastern England. 9-17 in Harwood, G M and Smith, D B (editors). The English Zechstein and Related Topics. Geological Society Special Publication No.22. | |||
1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
E062 E033 E070 E052 E078 E090 E082 E043 E042 E126 E087 E032 E027 E127 E142 |