| Computer Code: |
LLW |
Preferred Map Code: |
notEntered |
| Status Code: |
Full |
| Age range: |
Chadian Substage (CI)
— Chadian Substage (CI) |
| Lithological Description: |
Red and green mudstone, marl, sandstone and cornstone with sporadic thin, impure limestone beds. |
| Definition of Lower Boundary: |
Unconformity on Silurian seen in stream section at Llanfwrog (SJ 1049 5782) and at Lady Bagots Drive (SJ 1022 5952). |
| Definition of Upper Boundary: |
Overlain by lagoonal-peritidal limestones at Lady Bagots Drive (SJ 1026 5975). |
| Thickness: |
20-60m |
| Geographical Limits: |
North Denbighshire, Vale of Clwyd, Dyserth. |
| Parent Unit: |
Not Entered (?)
|
| Previous Name(s): |
Basement Beds [Obsolete Name and Code: Use WAR, HEY, BRCT, BABE, LFSB, LLW, DELA, FRM, PLT, FRFA, PFLD, DDC]
(-3812)
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Reference Section |
Section, Lady Bagots Drive, Rhewl, near Ruthin, Clwyd. |
| Reference Section |
Stream section in Lady Bagots Drive, Rhewl, near Ruthin, Clwyd. |
| Type Section |
Stream section, 400m to 1020m west of Llanfwrog church, Ruthin, Clwyd. |
| Reference(s): |
| Williamson, I T and Addison, R. Not yet published. The geology of the area around Flint. In Preparation for the Memoir of the British Geological Survey, Sheet 108 (England and Wales). |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
| none recorded or not applicable |
