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Geological Society, London, Special Publications; 1964; v. 1; p. 221-232;
DOI: 10.1144/GSL.SP.1964.001.01.21
© 1964 Geological Society of London

Part 4: Stratigraphical Review

The Carboniferous period

Edward Howel Francis, B.SC., F.R.S.E., F.G.S. & Austin William Woodland, PH.D., F.G.S.

Geological Survey Office, Ring Road Halton, Leeds 15

It is estimated that the duration of Carboniferous time was 65 m.y., extending from 345 to 280 m.y. ago. Using age-determinations made on sediments, contemporaneous volcanic rocks, and intrusive rocks that have varying degrees ofstratigraphical control, a provisional Carboniferous time-scale is proposed. In terms of the standard European succession, to which most of the critical data pertains or can be related, it is as follows: