Brockram (basal Breccia) outcrops in the Whitehaven and Workington district (Geological survey of Gt. Britain sheet 28). Saltom Bay gives a good exposure of the Brockram. Along the coast (Saltom Bay to St. Bees ) the thickness of the Brockram varies from 0.75m to 20.5 m. Inland boreholes have revealed the thickness of Brockham to be up to 121 m. 
- British Geological Survey (2011). "Appleby Group". The BGS Lexicon of Named Rock Units. Retrieved 15 February 2011.
- The Geology of the Whitehaven and Workington district. T. Eastwood et al. pub. HMSO. 1931. page 206, Plate VIa.
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