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V.—Note On a Bed of Red Chalk in the Lower Chalk of Suffolk

Published online by Cambridge University Press:  01 May 2009

A. J. Jukes-Browne
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Extract

The section exposing this stratum was discovered during an excursion made last June by Mr. W. Hill, F.G.S., and the author. It occurs in a quarry near West Row Ferry, about two miles west of Mildenhall;here a band of red marly chalk is seen near the entrance, dipping westward at a low angle, hut soon becoming horizontal and running along the whole face of the quarry, till it is cut off by a fault, which brings up lower beds on the southern side.

Type
Original Articles
Information
Geological Magazine , Volume 4 , Issue 1 , January 1887 , pp. 24 - 28
Copyright
Copyright © Cambridge University Press 1887

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References

page 24 note 1 Since this paper was read, additional evidence that diamonds originate by the action of peridotites on carbonaceous rocks has been collected from many localities. The most instructive examples are from New South Wales, where the diamond gravels lie near the contact of basalts or serpentine with Carboniferous rocks, the serpentine here being an altered olivine enstatite rock. At the Bingera diamond-field a mass of eruptive serpentine is almost surrounded by Carboniferous rocks containing coal-seams.inWestern America, also, the diamantiferous gravels are near higher ground, where serpentines and carbonaceous rocks occur together. Possibly a clue may be thus afforded for more systematic search.