| Computer Code: |
HALL |
Preferred Map Code: |
Hln |
| Status Code: |
Full |
| Age range: |
Early Devonian Epoch (DL)
— Early Devonian Epoch (DL) |
| Lithological Description: |
A dark grey slaty mudstone, with black mudstone nodules, sporadic thin siltstone lenses and dispersed limestone lenses, crinoidal and shelly in part and with subordinate laminated mudstone and siltstone. |
| Definition of Lower Boundary: |
Faulted - thought to be part of the Parautochtonous succession. |
| Definition of Upper Boundary: |
Faulted. |
| Thickness: |
Unknown: details obscure due to complex folding; possibly several hundred metres. |
| Geographical Limits: |
BGS 1:50 000 scale Sheet 353 (Mevagissey), (England and Wales). |
| Parent Unit: |
Meadfoot Group (MDT)
|
| Previous Name(s): |
Meadfoot Beds
(-76)
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Partial Type Section |
Coastal section between Polgwyn Beach and the Vans. |
| Reference(s): |
| Reid, C, 1907. Geology of the country around Mevagissey. Memoir of the Geological Survey of Great Britain. (London: HMSO.) |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
E353
E354
|
