| Computer Code: |
JURBY |
Preferred Map Code: |
notEntered |
| Status Code: |
Full |
| Age range: |
Devensian Stage (QD)
— Devensian Stage (QD) |
| Lithological Description: |
Stratigraphically complex glacigenic sequence of local provenance, including laminated and massive muds with dropstones, interstratified gravel sand and mud, and muddy diamicton. |
| Definition of Lower Boundary: |
Disconformably overlies diamictons, sands and gravels (that contain exotic clasts) of the Orrisdale Formation. The unit crops out along the northwest coast of the Isle of Man. |
| Definition of Upper Boundary: |
Unconformably overlain by peat, organic mud and calcareous marl of the Glen Balleira Formation that infills kettlehole basins. |
| Thickness: |
Unrecorded, but diagrams suggest >10m thick. |
| Geographical Limits: |
Northern part pf the Isle of Man. (50k sheets 36 and possibly 46). |
| Parent Unit: |
Irish Sea Coast Glacigenic Subgroup (ISCG)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Section |
Coastal cliff section at Jurby Head, c.1km west of the village of Jurby West, on the western side of the Isle of Man. Chadwick, R A et al. 2001. |
| Reference(s): |
| Thomas, G S P. 1999. Northern England. 91-98 in Bowen, D Q (Editor), A revised correlation of Quaternary and Neogene deposits in the British Isles. Geological Society Special Report No.23. |
| Chadwick, R A, Jackson, D I, Barnes, R P, Kimbell, G S, Johnson, H, Chiverell, R C, Thomas, G S P, Jones, N S, Riley, N J, Pickett, E A, Young, B, Holliday, D W, Ball, D F, Molyneux, S G, Long, D, Power, G M and Roberts, D H. 2001. Geology of the Isle of Man and its offshore area. British Geological Survey Research Report, RR/01/06. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
E400
|
