| Computer Code: |
LOCY |
Preferred Map Code: |
Locy |
| Status Code: |
Full |
| Age range: |
Caradoc Series (O4)
— Caradoc Series (O4) |
| Lithological Description: |
Crystal-rich parataxitic tuff and lith-rich coarse lapilli-tuff, locally with a weak eutaxitic fabric, much hematised and silicified. |
| Definition of Lower Boundary: |
Not seen but mapped at the change from densely welded andesitic tuff of the Fleming Hall Formation to a mixture of lithic lapilli-tuff and crystal rich tuff. |
| Definition of Upper Boundary: |
Defined by the base of the overlying rhyolitic welded tuff of the Blengdale Formation. |
| Thickness: |
About 650m |
| Geographical Limits: |
Restricted to the area west of the Thistleton Fault (Lake District Boundary Fault Zone), Cumbria. |
| Parent Unit: |
Borrowdale Volcanic Group (BVG)
|
| Previous Name(s): |
Lowcray Formation [Obsolete Name and Code: Use LOCY]
(-2915)
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Section |
Lower reaches of the River Bleng, West Cumbria. |
| Reference(s): |
| Akhurst, M C, Chadwick, R A, Holliday, D W, McCormac, M, McMillan, A A, Millward, D, Young, B, Ambrose, K, Auton, C A, Barclay, W J, Barnes, R P, Beddoe-Stephens, B, James, J C W, Johnson, H, Jones, N S, Glover, B W, Hawkins, M P, Kimbell, G S, MacPherson, K A T, Merritt, J W, Milodowski, A E, Riley, N J, Robins, N S, Stone, P, and Wingfield, R T R. 1997. The geology of the west Cumbria district. Memoir of the British Geological Survey, Sheets 28, 37 and 47 (England and Wales). 138pp. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
E037
|
