The BGS Lexicon of Named Rock Units — Result Details
Linley Formation
| Computer Code: | YSY | Preferred Map Code: | YSY |
|---|---|---|---|
| Status Code: | Full | ||
| Age range: | Neoproterozoic Era (AZ) — Neoproterozoic Era (AZ) | ||
| Lithological Description: | Greenish grey shales, siltstones and very fine- to fine-grained sandstones. Local interbedded lapilli tuffs. Sandstones as thick homogeneous beds with sporadic normal grading, also as isolated beds 10 cm to 2 m thick displaying upward-fining trends. | ||
| Definition of Lower Boundary: | Not known. Occurs as fault slivers adjacent to Pontesford-Linley Fault. | ||
| Definition of Upper Boundary: | Not known. | ||
| Thickness: | Not known. | ||
| Geographical Limits: | Between Linley Big Wood and Knolls Farm, Norbury, Shropshire. | ||
| Parent Unit: | Stretton Group (YST) | ||
| Previous Name(s): | Portway Formation
(PWG)
Portway Formation (PWG) |
||
| Alternative Name(s): | Portway Formation |
||
| Stratotypes: | |||
| Type Section | In vicinity of Linley Big Wood. | ||
| Reference(s): | |||
| Pauley J C. 1991. A revision of the stratigraphy of the Longmyndian Supergroup, Welsh Borderland, and of its relationship to the Uriconian volcanic complex. Geological Journal, Vol. 26, 167-183. | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| E165 | |||