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The Bembridge Beds are strata forming part of the fluvio-marine series of deposits of Oligocene age, in the Isle of Wight and Hampshire, England. They lie between the Hamstead beds above and the Osborne beds below. The Bembridge marls, freshwater, estuarine and marine clays and marls (70–120 ft.) rest upon the Bembridge limestone, a freshwater pool deposit (15–25 ft.), with large land snails (Amphidromus and Helix), freshwater snails (Planorbis, Lymnaea), and the fruits of Chara. The marls contain, besides the freshwater Lymnaea and Unio, such forms as Meretrix, Ostrea, and Melanopsis. A thin calcareous sandy layer in this division has yielded the remains of many insects and leaf fossils.
This article incorporates text from a publication now in the public domain: Chisholm, Hugh, ed. (1911). "Bembridge Beds". Encyclopædia Britannica 3 (11th ed.). Cambridge University Press. p. 714. This cites "Geology of the Isle of Wight," Mem. Geol. Survey, 2nd ed. 1889.
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