Lynebank Member (LYN), Carboniferous, Northern England Province
Lynebank Member is part of the Lyne Formation.
Alternations of thin limestones, dolomitic limestones (‘cementstones’) and mudstones, with sandstone beds towards the top of the sequence.
A partial type section including the lower part of the Lynebank Member occurs in the River White Lyne between Ellery Sike (NY 5433 7584) and Nixontown (NY 5482 7550). The upper part of the Lynebank Member occurs in the River Black Lyne (NY 5431 7828 to 5411 7821) south-east of Holmehead Farm (Day, 1970).
Lower and upper boundaries
Base not seen. The upper boundary is conformable at the base of the Bogside Limestone at the base of the Bewcastle Member (Figure 11, Column 2) with cyclical sequences of sandstone, siltstone, mudstone and thin limestones and ‘cementstones’.
About 430 m at Bewcastle.
Distribution and regional correlation
The Northumberland–Solway Basin, but described only in the Bewcastle region (Day, 1970).
- Day, J B W. 1970. Geology of the country around Bewcastle.Memoir of the Geological Survey of Great Britain, Sheet 12 (England and Wales).
- Leeder, M R. 1974. Lower Border Group (Tournaisian) fluviodeltaic sedimentation and palaeogeography of the Northumberland Basin.Proceedings of the Yorkshire Geological Society, Vol. 40, 129–180.