1. Botryococcus;Batten,1996
2. New records of the Westbury Formation (Penarth Group, Rhaetian) in North Yorkshire, England
3. Frost, D. V. 1998. Geology of the country around Northallerton. Memoir of the British Geological Survey, England and Wales, Sheet 42.
4. Gaunt, G. D. , Fletcher, T. P. & Wood, C. J. 1992. Geology of the country around Kingston upon Hull and Brigg. Memoir of the British Geological Survey, England and Wales, Sheets 80, 89.
5. Complex extensional faulting of Triassic rocks north of York, North Yorkshire, UK