1. AKHURST, M.C. , CHADWICK, R.A. , HOLLIDAY, D.W. , McCORMAC, M. , McMILLAN, A.A. , MILLWARD, D. & YOUNG, B. 1997. Geology of the west Cumbria district. Memoir of the British Geological Survey, Sheets 28, 37 and 47 (England and Wales).
2. ARTHURTON, R.S. & WADGE, A.J. 1981. Geology of the country around Penrith. Memoir of the Geological Survey of Great Britain, Sheet 24 (England and Wales).
3. Permian and Triassic;ARTHURTON,1978
4. Lithostratigraphical subdivision of the Triassic Sherwood Sandstone Group in west Cumbria
5. The Triassic rocks of the Annan Basin, Dumfriesshire;BARRETT;Transactions of the Geological Society of Glasgow,1942