| Computer Code: |
PWB |
Preferred Map Code: |
notEntered |
| Status Code: |
Pending Upgrade |
| Age range: |
Famennian Age (DA)
— Tournaisian Age (CT) |
| Lithological Description: |
Nodular and bedded limestone, greenish-grey slate and fine-grained sandstone. |
| Definition of Lower Boundary: |
Faulted. |
| Definition of Upper Boundary: |
Faulted. |
| Thickness: |
Not known. |
| Geographical Limits: |
Local to type area. |
| Parent Unit: |
Not Applicable (-)
|
| Previous Name(s): |
Petherwin Beds [Obsolete Name and Code: Use PWB]
(-2383)
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Area |
Hillside exposures, 1.5 km. west-south-west of South Petherwin. |
| Reference(s): |
| British Geological Survey. 1993. Tavistock. England and Wales Sheet 337. Solid and Drift 1:50 000 Provisional Series (Keyworth, Nottingham: British Geological Survey.) |
| Reid, C, Barrow, G, Sherlock, R L, MacAlister, D A and Dewey, H. 1911. The geology of the country around Tavistock and Launceston. Memoir of the Geological Survey of Great Britain, Sheet 337 (England and Wales). |
| Sedgwick, A and Murchison, R I. 1840. On the physical structure of Devonshire, and on the subdivisions and geological relations of its older stratified deposits. Transactions of the Geological Society of London, Vol.5, 633-705. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
E337
|
