| Computer Code: |
BIML |
Preferred Map Code: |
BIML |
| Status Code: |
Pending Upgrade |
| Age range: |
Ludlow Epoch (SU)
— Ludlow Epoch (SU) |
| Lithological Description: |
Grey interbedded mudstones and siltstones; thin siltstones show parallel lamination, thicker beds are calcareous and commonly show intense convolute lamination. |
| Definition of Lower Boundary: |
Upward change in lithology from grey thickly bedded (blotchy) mudstone to grey interbedded siltstones and mudstones; thicker siltstones are calcareous and commonly show intense convolute lamination. |
| Definition of Upper Boundary: |
Not seen in area of survey. |
| Thickness: |
c. 125m. Lateral variations 0-400m. |
| Geographical Limits: |
Not defined. |
| Parent Unit: |
Not Entered (?)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Section |
Sheet 165. |
| Reference(s): |
| Allender, R. 1959. On the stratigraphy and structure of an area of Ludlowian and Lower Downtonian near Bishops Castle, Shropshire. Unpublished Ph.D. Thesis, University of Wales. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
E152
|
