The BGS Lexicon of Named Rock Units — Result Details
Winstermoor Lava Member
| Computer Code: | WMB | Preferred Map Code: | WMB |
|---|---|---|---|
| Status Code: | Full | ||
| Age range: | Brigantian Substage (CX) — Brigantian Substage (CX) | ||
| Lithological Description: | A dark grey basaltic lava, locally altered to green and brown clay with basalt fragments. | ||
| Definition of Lower Boundary: | Basalt of the Winstermoor Lava Member rests upon pale grey, massive limestones of the Bee Low Limestone Formation. | ||
| Definition of Upper Boundary: | The basalt of the Winstermoor Lava Member is overlain by grey to dark grey, bituminous limestones of the Monsal Dale Limestone Formation. | ||
| Thickness: | Up to 4.4 m thick proved in the Aldwark Borehole. | ||
| Geographical Limits: | Restricted to the area between Gratton Dale, Winster and Bonsall Moors and the workings of Millclose Mine. Boreholes show the lavas to be lenticular in distribution and locally absent. | ||
| Parent Unit: | Monsal Dale Limestone Formation (MO) | ||
| Previous Name(s): | Winster Moor Lava [Obsolete Name and Code: Use WMB]
(-1922)
Winstermoor Lava [Obsolete Name and Code: Use WMB] (-2538) Winstermoor Basalt [Obsolete Name and Code: Use WMB] (-3765) |
||
| Alternative Name(s): | none recorded or not applicable | ||
| Stratotypes: | |||
| Reference Section | Aldwark Borehole (SK25NW22), confidential record: 4.4 m thick clay with altered basalt fragments. Aitkenhead et al., 1985. | ||
| Type Area | Sacheveral Farm: There are no exposures, but the member is recognised by lava fragments in the soil. Aitkenhead et al., 1985. | ||
| Reference(s): | |||
| Aitkenhead, N, Chisholm, J I, and Stevenson, I P. 1985. Geology of the country around Buxton, Leek and Bakewell. Memoir of the British Geological Survey, England and Wales Sheet 111. | |||
| Shirley, J. 1950. The stratiographical distribution of the lead-zinc ores of Mill Close Mine, Derbyshire and the future prospects of the area. XVIII International Geological congress, London, Vol 7, 353-361. | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| E111 | |||