On the Relation of the Norwich or Fluvio-marine Crag to the Chillesford Clay or Loam

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Abstract
During the month of August last, in company with Professor Liveing, I visited Orford and Aldborough, and we made some observations which may tend to clear up the uncertainty which hangs over the relations of the Red Crag, Chillesford beds, and Fluvio-marine or Norwich Crag. We took with us the paper by Mr. Prestwich on the Chillesford Beds, in vol. v. of the Society's Journal, that by Mr. S. Y. Wood, jun., “On the Red Crag and its Relation to the Fluvio-marine Crag, and on the Drift of the Eastern Counties” (Annals and Mag. of Nat. Hist., March 1864), and the same author's “Map of the Upper Tertiaries of the Eastern Counties, with remarks thereon,” privately printed, 1865. After having begun to digest the materials we had collected, I visited the same neighbourhood again in the beginning of September. Mr. Prestwich has left it open as to “whether the Chillesford deposit may not be identical with the Mammaliferous Crag of Norwich ''*, or whether it “may not belong to a period one stage more recent than the Mammaliferous Crag; whether in fact it may not be the marine representative of that thin marine, freshwater, and land series, which, on the north-eastern coast of Norfolk, is spread over the patches of the Norwich Crag, and immediately underlies the great northern clay drift,” i. e., I conclude, Mr. Gunn's “laminated beds.” Sir Charles Lyell, however, in his work on the Antiquity of Man, decidedly adopts the former view, saying that ”the most

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