. Bulletin of the British Museum (Natural History), Geology. OF BRITISH ISLES 51 At Aveley straight-tusked elephant in Zone lib is replaced by mammoth in Zone III. Comparison of rodent species unfortunately cannot be made, since no diagnostic remains have been found in the Upper Floodplain Terrace. Arvicola cantiana is present in the Middle Terrace at Aveley, Ilford and Grays Thurrock. The megafaunas of Aveley and Ilford on the one hand, and of Trafalgar Square on the other, are so different that it is difficult to believe that they are contemporary, though consideration must be given to the p
. Bulletin of the British Museum (Natural History), Geology. OF BRITISH ISLES 51 At Aveley straight-tusked elephant in Zone lib is replaced by mammoth in Zone III. Comparison of rodent species unfortunately cannot be made, since no diagnostic remains have been found in the Upper Floodplain Terrace. Arvicola cantiana is present in the Middle Terrace at Aveley, Ilford and Grays Thurrock. The megafaunas of Aveley and Ilford on the one hand, and of Trafalgar Square on the other, are so different that it is difficult to believe that they are contemporary, though consideration must be given to the possibility of their representing different stages within a single climatic fluctuation. The evidence does not seem to support the latter alternative. The hippopotamus level at Trafalgar Square is Zone lib. A vast amount of Zone lib clay was exca- vated for cement-making at Aveley but no hippopotamus remains were found. The Ilford plant remains cover Zones I A-lib but there were no hippopotamus remains there ; two specimens formerly attributed to this animal have since been shown to have been incorrectly identified. It has been pointed out, in support of there having been only one temperate stage, that most of the Ilford mammal remains were recovered over a century ago, during excavations for brickearth which were relatively shallow and did not extend into THAMES ESTUARY IPSWICH IAN-TERRACE SEQUENCE SCHEME A (Morphological & Mammal Evidence). SCHEME B ( F^laeobotanical Evidence) Ilford Mammals Trafalgar Square Mammals. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original British Museum (Natural History). London : BM(NH)
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