| Computer Code: |
YWOL |
Preferred Map Code: |
notEntered |
| Status Code: |
Full |
| Age range: |
Ediacaran Period (AD)
— Ediacaran Period (AD) |
| Lithological Description: |
Coarse, pebbly sandstone and conglomerate with pebbles of quartzite, rhyolite and felsite. |
| Definition of Lower Boundary: |
Taken at the transition from coarse sandstones into conglomerate within the Bayston-Oakswood Formation; about 550m of these sandstones separate the conglomerate from the underlying Oakswood Conglomerate Member. |
| Definition of Upper Boundary: |
Taken at the transition into coarse sandstones of the Bayston-Oakswood Formation. |
| Thickness: |
From 75 m to 150 m thick. |
| Geographical Limits: |
Welsh Borderlandsm, specifically Sheet 152 (Shrewsbury), 165 (Montgomery) and 166 (Church Stretton). Disappears laterally due to faulting or is concealed by superficial deposits. |
| Parent Unit: |
Bayston-Oakswood Formation (BAGP)
|
| Previous Name(s): |
Lawn Hill Conglomerate [Obsolete Name and Code: Use YWOL]
(-2548)
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Reference Section |
Lawn Hill Pocock, R W, et al, 1938 |
| Reference(s): |
| Pocock R W, Whitehead T H, Wedd C B and Robertson T. 1938. Shrewsbury District including the Hanwood Coalfield. Memoir of the Geological Survey of Great Britain, England and Wales. (London: H.M.S.O.). |
| Greig D C, Wright, J E, Hains, B A, and Mitchell, G H. 1968. Geology of the country around Church Stretton, Craven Arms, Wenlock Edge and Brown Clee. Memoir of the Geological Survey, Sheet 166 (England and Wales). (London: HMSO.) 379pp. |
| Lapworth C and Watts W W. 1910. Shropshire. 739-769 in Geology in the field; the Jubilee Volume of the Geologists' Association (1858-1908). Monckton H W and Herries R S (editors). (London: Edward Stanford). |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
E152
E165
E166
|
