| Computer Code: |
HAW |
Preferred Map Code: |
HAW |
| Status Code: |
Pending Upgrade |
| Age range: |
Early Triassic Epoch (TE)
— Early Triassic Epoch (TE) |
| Lithological Description: |
[Obsolete: use CHES] Red-brown, yellow, or yellow-mottled, very fine- to coarse-grained sandstones, commonly cross-bedded, locally micaceous, silty or argillaceous, pebbly or conglomeratic. Generally friable. |
| Definition of Lower Boundary: |
Usually unconformable on Palaeozoic rocks. Where conformably overlying the Huntley Formation, base taken where conglomerate or sandstone containing locally derived clasts gives way to sandstones and conglomerates with few such clasts. |
| Definition of Upper Boundary: |
Base of overlying Hollington or Denstone formations (disconformable). |
| Thickness: |
0 - 300m+ |
| Geographical Limits: |
Needwood Basin. |
| Parent Unit: |
none recorded or not applicable
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Area |
Around Hawksmoor Wood, 2.5km eastnortheast of Cheadle, Staffordshire. |
| Reference Section |
Road cutting between Alton village and River Churnet. |
| Reference Section |
Bank of Ordley Brook, Stanton. |
| Reference(s): |
| Charsley, T J, 1982. A standard nomenclature for the Trassic formations of the Ashbourne district. Report of the Institute of Geological Sciences, No. 81/14. |
| 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. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
E123
E124
|
