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The palynological record across the Ordovician/Silurian boundary in the Cordillera Oriental, Central Andean Basin, northwestern Argentina
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文摘

Palynomorph assemblages across the Ordovician/Silurian boundary are presented.

The Late Ordovician trilete spores constitute the oldest record in South America.

The miospores age is well constrained by means of chitinozoans and acritarchs.

The Katian or Hirnantian age of the miospores is discussed.

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