The extensive uppermost Miocene (Messinian) evaporitic deposits of the Apennines are composed almost entirely of gypsum and currently contain no halite. The gypsum displays some unusual primary textures that, by analogy to gypsum that is now forming in modern solar works (salinas), indicate the former presence of halite laminae intercalated in the original sedimentary section. This implies that the Apennine basin during latest Miocene time was sufficiently arid to have permitted halite deposition.

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