F. W. HARMER ON THE KESSINGLAND CLIFF-SECTION.
137
The bed No. 4 is the Middle Glacial sand with fine shingle bands, which is generally present in the district. It rests upon the nearly horizontal surface of the beds Nos. 1, 2, and 3, from end to end of the section, except in one place near the Pakefield- Lighthouse gorge, where it cuts through No. 1 to the beach-line for the space of a few yards. For the greater part of the dis- tance from Kessingland to the Lighthouse gorge the Middle Glacial sands No. 4 are overlain by the chalky Boulder- clay of East Anglia (or Upper Glacial), No. 5, which here presents its usual features.
I am thus altogether at a loss to discover that sequence of beds which Mr. Gunn has recently described. The marine shells and cetacean bones mentioned, in the section given by him, as oc- curring in the Chillesford Clay have never yet been found in that bed in the Kessingland cliff ; and I know of no evidence what- ever to justify him in the asser- tion that the Norwich Crag, with its marine and freshwater shells, is there represented. No marine mollusca, so far as I know, have ever been found there at all.
So far also from proving that the Forest-bed is older than the Crag, the evidence of this section appears to me to point the other way. It would seem that the mammaliferous mottled clay, No. 2, was deposited either by a river or a lake whose northern bank, at least, was formed by the Chillesford Clay exposed at the Lighthouse gorge at the Pakefield end of the section, that this mammaliferous clay after- wards became sufficiently dry to allow it to be covered with vegcta-
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