XIII.—The Plant Remains in the Scottish Peat Mosses

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Abstract
An investigation of the peat mosses in some districts of the Scottish Highlands was made in 1905, with a view of comparing the features found there with those already recorded from the Southern Uplands in 1904. The salient feature met with in the Southern districts was the existence in all the older mosses of an upper and lower forest-bed, with a zone of Arctic plants intercalated between. The existence of this Arctic plant bed, stretching at the same horizon through the peat in districts widely separated, indicates a lowering of temperature which must have obtained over much greater areas; for the conditions implied by the presence of an Arctic vegetation at low levels in the South of Scotland would suffice—precipitation being great enough—to produce glaciation in the Highlands.

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