Page:Quarterly Journal of the Geological Society of London, vol. 33.djvu/139

Rh LATER TERTIARY GEOLOGY OF EAST ANGLIA. 101 the Waveney and Yare extended, which, having been filled in with the Upper and Middle Glacial, has not been re-excavated, re- maining as a low tableland, of which the cliff between Covehithe and Lowestoft forms the natural section. It is in the centre of this trough, thus intersected by the cliff, that the well-known Kessingland deposit lies, occupying at that point a shallow valley excavated out of the Chillesford Clay and Lower Glacial sands, as the sections which accompany the separate paper by one of us on the Kessingland -Cliff section show (see p. 135). We subjoin a small sketch map to make this description more intelligible. Fig. 20. — Sketch Map. (Scale 10 miles to the inch.) Yarmouth. Hopton and Corton Cliffs. Lowestoft. Pakefleld and Kessingland Cliffs. Eastou and Covehithe Clifts. River Bhftn. Dunwich Cliff. Upper and Middle Glacial. Lower Glacial and Chilles- ford beds. 3fc fiTTTl 1 1 1 iTi - The unshaded parts by the rivers are occupied by recent alluvium. The broken lines on either side of Pakefield and Kessingland cliffs indicate the supposed continuation of the interglacial valley of the Waveney. The two lines across rivers are those of sections XV. & XVI. N.B. At the point marked with a cross a little way S.W. of Lowestoft, and about 10 furlongs inland from Pakefield Cliff, there occurs on low ground an excavation in mottled brick-earth resembling the Mammalian bed of Kessing- land Cliff; but we are not aware whether it be that bed or the Contorted Drift. If these views are right, there seems reason for suspecting that this Kessingland bed, containing mammalian remains and rootlets (which is directly overlain by the Middle Glacial), may belong to the period of interglacial valley-excavation we have been discussing. The Lower Glacial beds of Easton and Covehithe cliffs, and those n2