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This is ripe sauvignon blanc, showing the mineral character of silex soils, which mix flint and sand.

The soils there are often clay and tuffeau, a form of limestone, as well as flinty silex.

Some Sancerres, as a reader who identified himself as “Ludovic of New York” pointed out, come from grapes planted on flinty silex soils in the eastern part of the appellation and tell a different story.

The composition of the soil is everywhere the same; nothing but masses of silex and salt, hard and sharp.

The desmids resemble the diatoms in the geometrical character of their forms, but they have no shell of silex, and are therefore easily destroyed.