On the Relation of the Westleton Beds, or Pebbly Sands of Suffolk, to those of Norfolk, and on their Extension Inland; with some Observations on the Period of the Final Elevation and Denudation of the Weald and of the Thames Valley, &c.

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Abstract
1. Objects of the Paper &c. In the first part of this paper * the relation of the Wesfleton Beds in the Eastern Counties to the Crag Series on the one hand, and to the Glacial Series on the other, was discussed. My object in this part is to trace the extension of the former beyond the area of the Crag, aud to show that a Westleton Shingle-bed passes transgressively over the Red Crag, the Tertiary strata, and the Chalk, and ranges westward through the length of the London Basin, while it rises to considerable heights above the Glacial Drifts and exists independently of them; and although it occupies only isolated and detached outliers, if the relation of these outliers to the Pre-Glacial Beds of Suffolk and Norfolk—the position of which has been proved—can be determined, we shall then have a definite base by which to correlate them and establish the order of succession and relative age of the many Drift Beds of the London Basin. I purpose therefore to proceed step by step and to take each stage separately, confining myself now to the oldest and highest stage, where the distinctive characters of composition are best defined. These are lost in later stages, owing to frequent reconstruction, but we can then follow by levels. In 1847 I showed that in the neighbourhood of London there were hill-gravels as distinct from valley-gravels, but I was not then in possessxon of any clue whereby to fix their separate age. Subsequent observations, especially

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