| Computer Code: |
LNS |
Preferred Map Code: |
LnS |
| Status Code: |
Full |
| Age range: |
Guadalupian Epoch (PUG)
— Early Triassic Epoch (TE) |
| Lithological Description: |
Sandstone, very fine- to medium-grained. Argillaceous, red-brown with buff mottles, cross-stratified; subordinate beds of red-brown mudstone and conglomerate. |
| Definition of Lower Boundary: |
Gradational, upward passage by interdigitation, from mudstone of Edlington Formation. Overlaps successively onto Cadeby Formation and Basal Breccia to south of Nottingham. |
| Definition of Upper Boundary: |
Marked but gradual upward increase in grain size and pebble content into overlying Nottingham Castle Sandstone Formation. |
| Thickness: |
12 - c. 70 m |
| Geographical Limits: |
Crops out from Nottingham to south Yorkshire, identifiable in subsurface to east. Lower part is a sandy facies of upper Permian, Edlington Formation. |
| Parent Unit: |
Not Applicable (-)
|
| Previous Name(s): |
Lower Mottled Sandstone [Obsolete Name and Code: Use BRI, KNSF, LNS]
(-4496)
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Section |
Former quarry face along north side of Queen's Medical Centre, Nottingham. |
| Reference Section |
Former moulding sand quarries, Bobbers Mill, Nottingham. Includes boundary with, and lowermost 2 m of, Nottingham Castle Sandstone Formation. |
| Reference(s): |
| Warrington, G, Audley-Charles, M G, Elliott, R E, Evans, W B, Ivimey-Cook, H C, Kent, P E, Robinson, P L, Shotton, F W and Taylor, F M. 1980. A correlation of the Triassic rocks in the British Isles. Special Report of the Geological Society of London, No.13. |
| Charsley, T J, Rathbone, P A and Lowe, D J, 1990. Nottingham: A geological background for planning and development. British Geological Survey Technical Report WA/90/1. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
E126
E142
E141
|
