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Published online by Cambridge University Press: 01 May 2009
Since the publication of William Smith's Map of Norfolk in 1819, the sections around West Dereham and Shouldham have been accepted as proving the occurrence of true Gault in this part of West Norfolk. Messrs. Rose,2 Fitton,3 and later writers, all accept this determination. Mr. Teall,1 writing in 1873, points out the close relation of the fossils from the “Coprolite Bed” of West Dereham to those of the “Ammonites mammillaris zone” of Folkestone, and correlates the overlying blue marly clay with the Gault, from the occurrence in it of Ammonites interruptus.
page 55 note 1 The Kimmeridge Clay is also locally known as “Gault.”
page 55 note 2 Phil. Mag., series 3, vol. vii. pp. 171–182.
page 55 note 3 Trans. Geol. Soc., series 2, vol. iv. p. 312.
page 56 note 1 The Potton and Wicken Phosphatic Deposits, 8vo. pp. 20, 21.
page 56 note 2 See also Keeping's Neocomian Deposits of Upware, etc., 8vo. pp. 11, 54.
page 58 note 1 See Whitaker, Presidential Address to the Norwich Geol. Soc. 1882, Proc. Nor. Geol. Soc. vol. i. pp. 207–236.