| Computer Code: |
MDD |
Preferred Map Code: |
MdD |
| Status Code: |
Full |
| Age range: |
Caradoc Series (O4)
— Caradoc Series (O4) |
| Lithological Description: |
Dacite lava flow: porphyritic, flow-banded, locally autobrecciated, white-weathered. |
| Definition of Lower Boundary: |
Incoming of dacite above volcaniclastic sedimentary rocks of Esk Pike Sandstone Formation. |
| Definition of Upper Boundary: |
Top not seen in Type Area or Reference Section. Probable equivalent lithologies to the north are overlain by the Helvellyn Tuff and Deepdale Sandstone formations. |
| Thickness: |
0 - 75m |
| Geographical Limits: |
Middle Dodd and Little Hart Crag, on north side of the Kirkstone Pass, Cumbria. |
| Parent Unit: |
Borrowdale Volcanic Group (BVG)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Area |
Summit of Middle Dodd, 1.5km north-north-east of Kirkstone Pass. |
| Reference Section |
Little Hart Crag 2 - 3km northeast of Kirkstone Pass. |
| Reference(s): |
| Millward, D, Johnson, E W, Beddoe-Stephens, B, Young, B, Kneller, B C, Lee, M K, Fortey, N J, Allen, P M, Branney, M J, Cooper, D C, Hirons, S, Kokelaar, B P, Marks, R J, McConnell, B J, Merritt, J W, Molyneux, S G, Petterson, M G, Roberts, B, Rundle, C C, Rushton, A W A, Scott, R W, Soper, N J, and Stone, P. 2000. Geology of the Ambleside district. Memoir of the British Geological Survey, England and Wales, Sheet 38. |
| Woodhall, D G, 1998. The geology of the Wythburn, Thirlmere and Fairfield areas of the north-east Lake District. British Geological Survey Technical Report WA/98/07. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
E038
E029
E030
E039
|
