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Ashdown Sand: Hard sand, with some beds of calc-grit: 160. Ashburnham Beds: Mottled white and red clay, with some sandstone: 330.
This lower division of the Wealden consists of sand, sandstone, calciferous grit, clay, and shale; the argillaceous strata, notwithstanding the name, predominating somewhat over the arenaceous, as will be seen by reference to the following table, drawn up by Messrs. Tunbridge Wells Sand: Sandstone and loam: 150. Wadhurst Clay: Blue and brown shale and clay, with a little calc-grit: 100.
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