On the Gravel-beds of the Valley of the Wey

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The river Wey takes its rise within the area of the Wealden denudation, of the north-western portion of which it conveys away the waters into the London basin through the break in the chalk-range at Guildford. The portion of the valley of the Wey which mainly furnishes subject-matter for the present communication lies immediately south of Guildford, towards Godalming. To the east of Farnham there is a depression of the chalk-strata for an interval of a mile; towards this point of the upper branches of the Wey, known as the Farnham River, comes down in a direct course from its source, near Alton, and would flow out into the London basin but for an intervening difference of level of very small amount, and which causes the stream to turn away at a right angle in the direction of Waverley. The line of valley from Farnham to Alton belongs to the system of disturbances which attended the Wealden elevation*. In this upper portion of the valley of the Wey we have a repetition of all the phaenomena of the Guildford Valley with respect to the limited distributoin, composition, and arrangement of the gravel-beds, so that it will not be necessary to give any detailed description of them; and for the same reason, the gravel-beds of the valley of the Mole, at Dorking and Betchworth, will need only incidental notice. It would require a great extent of illustration to show the detail of the distribution of these gravels from Alton to Reigate,