: Paléoclimatologie: clay

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clay

Clay is a type of fine-grained natural soil material containing clay minerals. The latter are hydrous aluminium phyllosilicate minerals, composed of aluminium and silicon ions bonded into tiny, thin plates by interconnecting oxygen and hydroxide ions. Clays develop plasticity when wet, due to a molecular film of water surrounding the clay particles, but become hard, brittle and non–plastic upon drying or firing. (Adapted from: https://en.wikipedia.org/wiki/Clay)

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