Three macrofloral interval zones, Lobatopteris vestita, L. micromiltoni, and Linopteris bunburii, recognized in the Westphalian D and the cantabrica Biozone in the Stephanian of Europe, are also present in the Morien Group (Pictou Group) of Sydney Coalfield, Nova Scotia. These zones allow a more refined correlation to be made between sequences of the same age in the Sydney and south Wales coalfields and thus between western Europe and North America in general.

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