Page:Quarterly Journal of the Geological Society of London, vol. 33.djvu/131

Rh LATER TERTIARY GEOLOGY OF EAST ANGLIA. 93 Fig. 14.__ Section XIV., across the Tese Valley. (Length 4 miles. Yortical scale 17£ times the horizontal.) Brick-pit 5 furl. W.N.W. of Site of Shottesham church. mill. River Tese. Deep exca- vation in Pit on Sheets Shottesham Hill. Common. E. 1, 5, 6, 7, 8 as in fig. o. 4. Remnants of the Chillesford beds and Fluvio-marine Crag. 10. Postglacial valley-gravel and recent alluvium. On both sides of the Tese valley the high ground is occupied by the Upper Glacial clay, which conceals every thing ; but we feel little doubt that the Contorted Drift is present in thickness beneath it, the denudation having operated mostly along the lines of the valleys which have afterwards been re-excavated postglacially. The dotted lines which continue the line of section XIY. at its eastward extremity indicate our view in this respect ; and in fact, if the section which we have given across the Tese were continued south-eastwards to the valley of the Waveney at Bungay, protrusions of the Contorted Drift thus underlying the high ground between would be encoun- tered at Headenham. The only river-valley of East Norfolk remaining to be noticed is that of the Ket, which river falls into the Yare eight miles west of Yarmouth. The features of this valley differ from those of the Tese in the more general presence of the Contorted Drift, which comes out pretty regularly along both its sides. The Pebbly Sands underlying it are also in great thickness ; and to the east of Loddon they form masses of shingle, which, however, are not oblique-bedded, as are the similar masses near Halesworth and Henham. The following is a section across the Ket valley. Fig. 15.- W.N.W. -Section XV., across the Ket Valley. (Length 2 miles. Yertical scale 17 times the horizontal.) Pit ofurl. E. by S. E.S.E. References as in fi£. 5.