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They would not thus form a layer of flint keeping more or less to the same level in the chalk. At the periphery, where they entered the area, they would be lower in the chalk, and gradually rise.
The blackest flint nodules I have seen occur in a chalk-pit near Faversham, but the apparently black silica becomes white when powdered, showing it to be merely an optical effect.
AT one part of Caterham Valley, Surrey, there is an example of an abundance of red flints similar to that mentioned by W. Fream (NATURE, vol. xxv. p. 437). The colour is, doubtless, due to the ...
Romans on the English chalk built roadbeds of flint cobbles and covered them with compacted gravel and slag. One Roman road ran close by the White Horse of Uffington, if the white horse was—as ...
England’s chalk streams were millions of years in the making. Can they survive today? There are fewer than 300 of these streams on the planet, and they’re teeming with life.