| Computer Code: |
1HELM |
Preferred Map Code: |
Helm |
| Status Code: |
Full |
| Age range: |
Pridoli Epoch (SO)
— Pridoli Epoch (SO) |
| Lithological Description: |
Laminated siltstone and mudstone with thinly interbedded, fine-grained sandstone that is pervasively reddened. |
| Definition of Lower Boundary: |
Base of the lowest reddened laminated siltstone unit where it overlies thickly bedded, unreddened, coarse- to medium-grained sandstone forming the lower part of the Kirkby Moor Formation. |
| Definition of Upper Boundary: |
Base of the lowest thick and unreddened sandstone bed from the upper part of the Kirkby Moor Formation. |
| Thickness: |
About 250m |
| Geographical Limits: |
Restricted to The Helm and its immediate vicinity. |
| Parent Unit: |
Kirkby Moor Formation (KMF)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Section |
Disused quarry on the northwest side of The Helm, a hill on the southeast side of Kendal. King, 1994. |
| Type Area |
The Helm, a hill on the southeast side of Kendal. King, 1994. |
| Reference(s): |
| King, L M. 1994. Turbidite to storm transition in a migrating foreland basin: The Kendal Group (Upper Silurian), northwest England. Geological Magazine, Vol.131, 255-267. |
| Kneller, B C, Scott R W, Soper N J, Johnson E W and Allen P M, 1994. Lithostratigraphy of the Windermere Supergroup, Northern England. Geological Journal, Vol. 29, 219-240. |
| Shaw, R W L. 1971. The faunal stratigraphy of the Kirkby Moor Flags of the type area near Kendal. Westmorland. Geological Journal, Vol.7, p.359-380. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
| none recorded or not applicable |
