| Computer Code: |
HUN |
Preferred Map Code: |
HUN |
| Status Code: |
Full |
| Age range: |
Guadalupian Epoch (PUG)
— Early Triassic Epoch (TE) |
| Lithological Description: |
Poorly-sorted matrix-supported conglomerate and very coarse-grained pebbly sandstone; there is a large proportion of locally-derived subrounded to angular clasts. |
| Definition of Lower Boundary: |
Unconformable on Carboniferous rocks. |
| Definition of Upper Boundary: |
Conformable, where sandstone or conglomerate with many locally-derived clasts give way to conglomerate or sandstone with few such clasts (Hawksmoor Formation). |
| Thickness: |
0-15m |
| Geographical Limits: |
Needwood Basin (Staffordshire, Leicestershire, Derbyshire). |
| Parent Unit: |
Sherwood Sandstone Group (SSG)
|
| Previous Name(s): |
Cheadle Breccias [Obsolete Name and Code: Use HUN]
(-2249)
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Reference Section |
For base: Hawksmoor Wood. |
| Type Area |
Huntley: small sections up to 2m in railway cutting. |
| Type Area |
Huntley: small sections up to 2m in railway cutting. |
| 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. |
| Wills, L J. 1956. Concealed Coalfields. (Glasgow & London: Blackie). |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
E124
|
