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Foraminifera from some Late Pliocene and Glacial Deposits of East Anglia

Published online by Cambridge University Press:  01 May 2009

W. A. Macfadyen
Affiliation:
Sedgwick Museum, Cambridge.

Extract

ELEVEN out of twelve samples of East Anglian Uppermost Pliocene and Pleistocene crag, clays, boulder clays, brickearths, and sands yielded foraminiferal faunas which are partly derived from older deposits. One hundred and thirty-one species are recorded, with their distribution in the samples and frequency; thirty-nine are indigenous, one derived from the Lower Pliocene, fifty-eight derived from the Chalk, eighteen derived from the Jurassic, and sixteen of doubtful age. Twenty-seven forms, largely indigenous, are figured; none are new. Notes are given on a few of the species. A short discussion, based solely on the foraminifera, is given of the climatic conditions under which the various deposits were laid down. The Weybourn Crag fauna points to cold conditions, and that of the Chillesford Beds sample to a climate rather less cold. From conflicting evidence and the derived nature of the faunas no very precise conclusions are possible in the case of the Pleistocene deposits, since the faunas contain a sprinkling of species characteristic of temperate or even warm conditions in addition to typically boreal forms.

Type
Original Articles
Copyright
Copyright © Cambridge University Press 1932

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References

page 584 note 1 In the Crag Monograph it appears under the name Polymorphina compressa, p. 258, pl. i, figs. 54, 65, 77–80; distorted specimens, pl. v, figs. 26, 28.Google Scholar