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III.—On the Transition Beds between the Devonian and Silurian Rocks
Published online by Cambridge University Press: 01 May 2009
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The transition or passage-beds between any two large formations are always difficult to make out, and those between the Old Red Sandstone and the Silurian are no exception to the rule. Much light has recently been thrown upon the latter, yet much more is needed before the exact order and position of their different beds can be considered as finally decided.
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