Cambeck Member
Cambeck Member (CMBB), Carboniferous, Northern England Province
The Cambeck Member is part of the Lyne Formation.
Name
Previously known as the Cambeck Beds (Day, 1970)[1]. See also Leeder (1974)[2].
Lithology
Rhythmic cycles of mainly sandstones, thin limestones and mudstones (the beds being abundantly shelly), and some algal beds and subsidiary siltstone. See Day (1970)[1]; Leeder (1974)[2].
Stratotype
Partial type sections at Bewcastle include the River White Lyne (NY 5116 7300 to 5109 7322) with strata from the Lower Antiquatonia Band to the base of the Whitberry Band, and Whitberry Burn (NY 5220 7404 to 5203 7408) with strata from the Barrow’s Pike Sandstone to the base of the Whitberry Band (Day, 1970)[1].
Lower and upper boundaries
At Bewcastle, the base is conformable on the uppermost algal bed (M.A.14 of Day, 1970)[1] of the Main Algal Member (Figure 11, Column 2), which comprises rhythmic alternations of limestone and mudstone with nodular algal beds.
There is a conformable upper boundary with the base of the locally developed Whitberry Band of the sandstone-dominated Fell Sandstone Formation.
Thickness
204 m at Bewcastle.
Distribution and regional correlation
The Northumberland–Solway Basin, but described only in the Bewcastle region (Day, 1970)[1].
Age
Arundian to Holkerian.
References
- ↑ Jump up to: 1.0 1.1 1.2 1.3 1.4 Day, J B W. 1970. Geology of the country around Bewcastle.Memoir of the Geological Survey of Great Britain, Sheet 12 (England and Wales).
- ↑ Jump up to: 2.0 2.1 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.