Lithostratigraphical subdivision of the Sherwood Sandstone Group (Triassic) of the northeastern part of the Carlisle Basin, Cumbria and Dumfries and Galloway, UK

Holliday, D W; Jones, N S; McMillan, Andrew. 2008 Lithostratigraphical subdivision of the Sherwood Sandstone Group (Triassic) of the northeastern part of the Carlisle Basin, Cumbria and Dumfries and Galloway, UK. Scottish Journal of Geology, 44 (2). 97-110. 10.1144/sjg44020097

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Abstract/Summary

Two formations, the St Bees Sandstone and Kirklinton Sandstone, have been mapped in the past within the Triassic Sherwood Sandstone Group of the eastern part of the Carlisle Basin, Cumbria, and adjacent parts of Dumfries and Galloway, UK. However, previous workers have found considerable difficulty in consistently identifying, defining and mapping the Kirklinton Sandstone Formation. The principal lithological change within the Sherwood Sandstone Group is between mainly fine-grained sandstones that are commonly micaceous and contain numerous mudstone interbeds in the lower and middle parts of the group, and fine- to coarse-grained sandstones with rare or no mica and few mudstone partings at the top of the group. This change occurs within the Kirklinton Sandstone Formation as previously mapped. This paper considers ways of subdividing the group lithostratigraphically and the nomenclature to be adopted. All options have some associated problems, but, in view of the recently determined similarities with the contiguous sandstones offshore, the adoption of the same terminology as that in the adjacent East Irish Sea and Solway Firth basins is suggested, i.e. the St Bees Sandstone Formation below (subdivided where possible into Rottington Sandstone and Calder Sandstone members) and the Ormskirk Sandstone Formation above.

Item Type:	Publication - Article
Digital Object Identifier (DOI):	10.1144/sjg44020097
Programmes:	BGS Programmes 2008 > Geology and Landscape Scotland
ISSN:	0036-9276
Additional Keywords:	Sherwood Sandstone Group, Kirklinton Sandstone, St Bees Sandstone, Triassic, lithostratigraphy
NORA Subject Terms:	Earth Sciences
Date made live:	04 Sep 2008 10:23 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/3974

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