The BGS Lexicon of Named Rock Units — Result Details

Shacklow Wood Lava Member

Computer Code: SWB Preferred Map Code: notEntered
Status Code: Full
Age range: Brigantian Substage (CX) — Brigantian Substage (CX)
Lithological Description: A dark greenish grey, locally purplish grey, basalt, variably amygdaloidal or compact, locally doleritic, in part autobrecciated.
Definition of Lower Boundary: Basalt lava of the Shacklow Wood Lava Member is underlain by pale and medium grey limestone of the Monsal Dale Limestone Formation.
Definition of Upper Boundary: Basalt lava of the Shacklow Wood Lava Member is overlain by mainly dark and medium grey limestone, thinly bedded and cherty, of the Monsal Dale Limestone Formation.
Thickness: Up to 20 m thick at outcrop at least 50 m thick in the Mogshaw Borehole (SK 16 NE 19) (SK 1889 6778).
Geographical Limits: Restricted to the area west of Ashford (SK 19 69), Peak District inlier.
Parent Unit: Monsal Dale Limestone Formation (MO)
Previous Name(s): Shacklow Wood Basalt (-4353)
Shacklow Wood Lava (-4354)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Section  Cliff by the A6, Great Shacklow Wood, Taddington Dale exposures 17m of compact and doleritic lavas. 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. 
Walters, S G and Ineson, P R. 1981. A review of the distribution of and the correlation of igneous rocks in Derbyshire, England. Mercian Geologist, Vol. 8, 81-132. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E111