| Computer Code: |
HBE |
Preferred Map Code: |
Hbe |
| Status Code: |
Full |
| Age range: |
Arenig Series (OR)
— Arenig Series (OR) |
| Lithological Description: |
Dark grey siltstone and mudstone in laminated and very thin beds, with up to 5% sandstone mainly in thin and medium beds; sporadic pebbly mudstone beds are also present. |
| Definition of Lower Boundary: |
Not exposed. |
| Definition of Upper Boundary: |
Taken at junction with the overlying Loweswater Formation. |
| Thickness: |
600 to 800m |
| Geographical Limits: |
Occurs within the Skiddaw inlier in the vicinity of Hope Beck and on the east side of Dodd. It is not recognised in any other inlier. |
| Parent Unit: |
Skiddaw Group (SKG)
|
| Previous Name(s): |
Hope Beck Slates [Obsolete Name and Code: Use HBE]
(-1588)
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Area |
The vicinity of Hope Beck and the east flank of Dodd. Cooper et al, 1995. |
| Reference(s): |
| Waters, C N, Gillespie, M R, Smith, K, Auton, C A, Floyd, J D, Leslie, A G, Millward, D, Mitchell, W I, McMillan, A A, Stone, P, Barron, A J M, Dean, M T, Hopson, P M, Krabbendam, M, Browne, M A E, Stephenson, D, Akhurst, M C, and Barnes, R P. 2007. Stratigraphical Chart of the United Kingdom: Northern Britain. (British Geological Survey.) |
| Cooper, A H, Rushton, A W A, Molyneux, S G, Hughes, R A, Moore, R M, and Webb, B C. 1995. The stratigraphy,correlation, provenance and palaeogeography of the Skiddaw Group (Ordovician) in the English Lake District. Geological Magazine, Vol. 132(2), 185-211. |
| Rushton A W A. 1988. Tremadoc trilobites from the Skiddaw Group in the English Lake District. Palaeontology, Vol.31(3), 677-698. |
| Webb, B C and Cooper, A H. 1988. Slump folds and gravity slide structures in a Lower Palaeozoic marginal basin sequence (the Skiddaw Group), NW England. Journal of Structural Geology, Vol.10(5), 463-472. |
| Cooper, D C, Lee, M K, Forty, N J, Cooper, A H, Rundle, C C, Webb, B C, and Allen, P M. 1988. The Crummock Water Aureole: a zone of metasomatism and source of ore metals in the English Lake District. Journal of the Geological Society, Vol. 145(4), 523-540. |
| Jackson, D E. 1978. The Skiddaw Group. 79-98 in Moseley, F (Ed.), The Geology of the Lake District. Yorkshire Geological Society, Occasional Publication, No.3. |
| Simpson, A. 1967. The stratigraphy and tectonics of the Skiddaw Slates and the relationship of the overlying Borrowdale Volcanic Series in part of the Lake District, Geological Journal, Vol.5, 391-418. |
| Jackson, D E. 1961. Stratigraphy of the Skiddaw Group in Cumberland, England. Geological Magazine, Vol.98, 515-528. |
| Rose, W C C. 1955. The sequence and structure of the Skiddaw Slates of the Lake District in the Keswick-Buttermere area. Proceedings of the Geological Association, Vol.65, 403-406 |
| Eastwood, T. 1933. 59 in Summary of Progress of the Geological Survey of Great Britain for 1932, Part 1. |
| Dixon, E E L. 1925. In Summ. Prog. Geological Survey of Great Britain for 1924, 70-71. |
| Ward, J C. 1876. The geology of the northern part of the English Lake District. Memoir of the Geological Survery of Great Britain. 132. |
| Cooper, A H. 1986. Excursion to the Skiddaw Group, Hope Beck. Proceedings of the Cumberland Geological Society, 4/4, 419-420. |
| Fortey, N J. 1989. Low grade metamorphism in the Lower Ordovician Skiddaw Group of the Lake District, England. Proceedings of the Yorkshire Geological Society, Vol. 47(4), 325-337. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
E029
E022
E023
|
