| Computer Code: |
DIM |
Preferred Map Code: |
DIM |
| Status Code: |
Full |
| Age range: |
Gorstian Age (SG)
— Gorstian Age (SG) |
| Lithological Description: |
Mudstone, homogeneous, medium-grey with common thin (<05cm) fine-grained sandstone layers. Commonly parallel laminated. |
| Definition of Lower Boundary: |
Passage down into fissile largely hemipelagic Gyfennie Wood Shales Member of the Nantglyn Flags Formation. |
| Definition of Upper Boundary: |
At abrupt onset of thicker (>30cm) fine-grained sandstones, commonly defined also by a lenticular bed of intraformational conglomerate. |
| Thickness: |
0-150m. |
| Geographical Limits: |
Around Newtown. |
| Parent Unit: |
Bailey Hill Formation (BAI)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Reference Section |
As type section. Also complete thickness in farm track (top c.[SO 1417 9540], base c.[1433 9551]) 370m, on 047 degrees from Bryn-rorin farm house, near Betws Cedewain, Newtown. |
| Type Section |
Cutting behind house at north end of Dingle, base of section (1074 9024) 835m, on 174 degrees from Dolfor Road Railway Bridge, Newtown. |
| Reference(s): |
| none recorded or not applicable |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
E165
|
