1. Fox-Strangways C. Gcol. Surv. Mem., “Geology of the Oolitic and Liassic Rocks, North and West of Malton,” p. 32.
2. Fox-Strangways C. op. cit., p. 32.
3. Daubree A. Etudes Synthétiques de la Géologie Expérimentale, 1879.
4. Kendall P. F. Wroot H. E. The Geology of Yorkshire, p. 242, 1924.
5. Fox-Strangways C. Geol. Surv. Mem., “Geology of the Country between Northallerton and Thirsk.”