Century Dictionary and Cyclopedia
- n. In geology, the name given to beds of calcareous sandstone or ironstone occurring near Hastings, England, in the Ashdown sand, a subdivision of the Hastings beds, by which term the lower section of the Wealden series is known to English geologists. The name Tilgate stone was also given by Mantell to certain beds of calcareous sandstone occurring in the Wadhurst clay—also a local subdivision of the Ashdown sand, and so named from the village of Wadhurst, near Tunbridge Wells. This Tilgate stone is noted for its reptilian remains, becoming in places a regular bone-bed. See
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