Computer Code: |
CM |
Preferred Map Code: |
CM |
Status Code: |
Full |
Age range: |
Westphalian Stage (CW)
— Westphalian Stage (CW) |
Lithological Description: |
Obsolete except in Northern Ireland. Replaced by Scottish Coal Measures Group (CMSC), Pennine Coal Measures Group (PCM), and South Wales Coal Measures Group (SWCM).
Alternation of sandstone, grey siltstone and grey mudstone, with frequent coal seams and seatearth horizons.
Lower Westphalian (Waters et al., 2007). |
Definition of Lower Boundary: |
none recorded or not applicable
|
Definition of Upper Boundary: |
none recorded or not applicable
|
Thickness: |
none recorded or not applicable
|
Geographical Limits: |
Northern Ireland. |
Parent Unit: |
Not Applicable (-)
|
Previous Name(s): |
Productive Coal Measures [Obsolete Name and Code: Use CM]
(LMCM)
|
Alternative Name(s): |
none recorded or not applicable
|
Stratotypes: |
none recorded or not applicable |
Reference(s): |
Whitehead, T H and Pocock, R W. 1947. Geology of the country around Dudley and Bridgnorth. Memoir of the British Geological Survey, Sheet 167. (England and Wales). |
Waters, C N, Gillespie, M R, Smith, K, Auton, C A, Floyd, J D, Leslie, A G, Millward, D, Mitchell, W I, McMillan, A A, Stone, P, Barron, A J M, Dean, M T, Hopson, P M, Krabbendam, M, Browne, M A E, Stephenson, D, Akhurst, M C, and Barnes, R P. 2007. Stratigraphical Chart of the United Kingdom: Northern Britain. (British Geological Survey.) |
Besley B M. 1988. Palaeogeographic implications of late Westphalian to early Permian red-beds, central England. In Sedimentation in a synorogenic basin complex. Besley B M, and Kelling, G (editors). |
1:50K maps on which the lithostratigraphical unit is found, and map code used: |
E024
E261
E262
E245
E231
E232
E234
E233
E107
N35
E055
E065
E064
E072
E080
E089
E018
S013
E103
E115
E128
E201
E217
E235
E236
E237
E268
E167
S039
E273
E274
E246
E049
|