| Computer Code: |
KDF |
Preferred Map Code: |
KdF |
| Status Code: |
Full |
| Age range: |
Abereiddian Stage (O2)
— Abereiddian Stage (O2) |
| Lithological Description: |
Grey mudstone and siltstone with subordinate beds of brown weathered, pyritic mudstone and dark blue grey calcareous mudstone, interbedded with thick units of volcaniclastic rock and locally intruded by altered basalt and andesite sills [previously lavas] |
| Definition of Lower Boundary: |
Not seen |
| Definition of Upper Boundary: |
Not seen |
| Thickness: |
At least 1000m |
| Geographical Limits: |
Restricted to the Cross Fell and Teesdale inliers, Cumbria |
| Parent Unit: |
Skiddaw Group (SKG)
|
| Previous Name(s): |
Milburn Beds (Group, Rocks, Series, Stage) [Obsolete Name and Code: Use KDF]
(MBN)
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Partial Type Section |
Milburn Beck, about 2km east of Milburn, Cumbria Arthurton and Wadge, 1981 |
| Reference Section |
Wythwaite Hole and Wythwaite Top, about 3km north of Milburn, Cumbria Arthurton and Wadge, 1981 |
| Reference(s): |
| Arthurton, R S, and Wadge, A J. 1981. Geology of the country around Penrith. Memoir for geological sheet 24. Institute of Geological Sciences, London, HMSO. |
| Burgess, I C, and Holliday, D W. 1979. Geology of the country around Brough-under-Stainmore. Memoir for 1:50 000 geological sheet 31 and parts of sheets 25 and 30. Geological Survey of Great Britain (England and Wales). (London: HMSO.) 131 pp. |
| Cooper, A H and Molyneux, S G, 1990. The age and correlation of Skiddaw Group [early Ordovician] sediments in the Cross Fell Inlier [northern England]. Geological Magazine, Vol.127, 147-157. |
| Hughes, R A and Kokelaar, B P, 1993. The timing of Ordovician magmatism in the English Lake District and Cross Fell Inliers. Geological Magazine, Vol.130, 369-377. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
E024
E031
E030
E025
|
