Micro textures of Estonian shelly phsophorites
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Micro textures of Estonian shelly phsophorites

by Sophie Graul, Tallinn University of Technology, Tallinn, Estonia and France

Microphotograph and SEM-AsB image of a brachiopod shell from the Toolse phosphorite deposit, Estonia.

The layers correspond to different recrystallisation of the initial shell material (e.g., organic laminae and shell structure) by secondary phosphatisation during the diagenesis.