Page:Quarterly Journal of the Geological Society of London, vol. 27.djvu/608

 PROCEEDINGS

OF

THE GEOLOGICAL SOCIETY.

POSTPONED PAPERS.

1. On the Structure of the Crag-beds of Suffolk and Norfolk, with some Observations on their Organic Remains. By Joseph Prestwich, Esq., F.R.S., &c, President. Part III. — The Norwich Crag and Westleton Beds.

(Read January 26, 1870*.)

[Plate XX.]

In the first and second parts of this paper† I described the structure of the Coralline and Bed Crags, and discussed the conditions under which they were formed. It now remains to describe the structure of the Crag series in Norfolk, and determine the correlation of the two geographical series.

The order of succession in the Suffolk area is clear and defined ; but the relation which the Crag-beds of that area bear to those of the same series in Norfolk does not admit of the same ready determination. The Norfolk beds themselves, in their several localities, have been described by Mr. B. C. Taylor ‡, Mr. S. Woodward §, Mr. Charlesworth ||, Sir Charles Lyell¶ and Mr. Trimmer**; and more recently a good brief account of them has been given by the Rev. J. Gunn†† ; whilst various papers, by Mr. Searles Wood §§, Mr. S.


 * For the discussion on this paper see Quart. Journ. Geol. Soc. vol. xxvi. p. 282.

† Ante pp. 115 & 325.

‡ " On the Crag-strata at Bramerton," Trans. Geol. Soc. 2nd series, vol. i. p. 371, 1826.

§ Outlines of the Geology of Norfolk, 1833.

Hist. vol. ix.
 * " On the Crag," Lond. & Edinb. Phil. Mag. 1835-36 ; and Ann. Nat.

¶ " On the Relative Ages of the Crags of Norfolk and Suffolk," Mag. Nat. Hist. vol. iii. 1839; and "On the Tertiary Strata of Belgium" &c, Quart. Journ. Geol. Soc. vol. viii. p. 277.

vol. vii. p. 19.
 * " On the Cliffs of Norfolk, - ' Quart. Journ. Geol. Soc. vol. i. p. 218, and

†† Sketch of the Geology of Norfolk, 1864.

§§ " On the Extraneous Fossils of the Bed Crag," Quart. Journ. Geol. Soc. vol. xv. p. 32 ; and " On the Structure of the Red Crag," Quart. Journ. Geol. Soc. vol. xxii. p. 538.