Dbk: 1 revision imported

2021-07-26T14:53:59Z

1 revision imported

← Older revision	Revision as of 15:53, 26 July 2021
(No difference)

Geosource>Volunteer 01 at 09:59, 30 July 2015

2015-07-30T09:59:11Z

New page

==Coupland Syke Limestone Member [http://www.bgs.ac.uk/lexicon/lexicon.cfm?pub=COSL (COSL)], Carboniferous, Northern England Province ==
Coupland Syke Limestone Member is part of the [[Great Scar Limestone Group]]
=== Name ===
The name was proposed by Pattison (1990)<ref name="Pattison90">Pattison, J.1990.Geology of the Orton and Sunbiggin Tarn districts: 1:10 000 sheets NY60NW and NE.''British Geological Survey Technical Report'', WA/90/12</ref> for the limestones that occur between the Park Hill Limestone Member and the Brownber Formation.

=== Lithology ===
Packstone, dark grey, regularly bedded, blocky, partly dolomitised and bituminous. Cyclically interbedded with thin mudstone and siltstone beds. There are traces of chert. The limestone beds are a fairly constant 0.75 m thickness.

=== Stratotype ===
A partial type section is in a stone quarry (working in 2005) on the B6261 road west of the village of Orton, Cumbria (NY 5975 0920). It occurs as a thick-bedded, bituminous limestone (wackestone) (see McCormac, 2001<ref name="Mccormac01">McCormac, M.2001.The Upper Palaeozoic rocks of the Shap and Penrith district, Edenside, Cumbria.''British Geological Survey Research Report'', RR/01/10</ref>). This differs from similar thick-bedded rocks in disused quarries to the west (NY 5984 0924 and 5924 0968) where the blocky limestones are commonly or extensively dolomitised (possibly in association with minor faults) and geodic (see Pattison, 1990<ref name="Pattison90"></ref>; McCormac, 2001<ref name="Mccormac01"></ref>). A reference section is Stapestones Quarry (disused), Raisbeck, Cumbria (NY 6496 0692) where 11 m of limestone (with some dolomitisation) are exposed (see Pattison, 1990<ref name="Pattison90"></ref>).

=== Lower and upper boundaries ===
The base of the member is taken at the top of a 5 m unit of interbedded sandstone and mudstone, which forms a topographical depression at the top of the underlying Park Hill Limestone Member. The junction is nowhere exposed, but the interbedded unit was formerly seen in a road cutting at (NY 7248 0448) during the construction of the Ravenstonedale By-pass, and the junction was recorded in M6 Site Investigation Boreholes at (NY 5885 0998).

The top of the member is taken at the base of the overlying Brownber Formation (Figure 9, Column 16) where there is a change from dark grey cyclically bedded limestone to pale grey ooidal limestone and calcarenite.

=== Thickness ===
Between 40 and 50 m.

=== Distribution and regional correlation ===
Ravenstonedale, Cumbria between the M6 road and the Dent Fault Zone, south of Kirkby Stephen.

=== Age and biostratigraphical characterisation ===
Chadian. Colonial corals (notably genus ''Dorlodotia'') are common within the member.

== References ==
<references/>
[[Category:Carboniferous lithostratigraphical nomenclature]]

Coupland Syke Limestone Member - Revision history

Dbk: 1 revision imported

Geosource>Volunteer 01 at 09:59, 30 July 2015