The BGS Lexicon of Named Rock Units — Result Details

Pathhead Formation

Computer Code: PDB Preferred Map Code: PDB
Status Code: Full
Age range: Brigantian Substage (CX) — Brigantian Substage (CX)
Lithological Description: Predominantly of mudstone and siltstone with beds of dolomite and limestone; sandstone is subordinate to the argillaceous rocks: overall pattern of sedimentation is cyclic with marine influence (marine bands common).
Definition of Lower Boundary: The conformable base of the Formation lies in a transitional sequence from the Sandy Craig Formation, the boundary being drawn at the base of the West Braes Marine Band. The boundary was originally drawn at a slightly lower level in the type section; the change was made by Browne (1986, fig.2).
Definition of Upper Boundary: The upper boundary is at the base of the Hurlet Limestone (base of Lower Limestone Formation).
Thickness: Maximum thickness is about 220m in East Fife
Geographical Limits: Central and East Fife.
Parent Unit: Strathclyde Group (SYG)
Previous Name(s): Pathhead Beds (-4832)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Section  On the Fife coast at Pathhead. 
Reference(s):
Forsyth, I H and Chisholm, J I, 1977. The geology of east Fife. Memoirs of the Geological Survey of Great Britain. 
Browne, M A E, 1986. The Classification of the Lower Carboniferous in Fife and Lothian. Scottish Journal of Geology, Vol.22, p.422-425. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S040 S032 S032 S049 S041