Sandbian
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| Ordovician period 488-444 | ||||||
|---|---|---|---|---|---|---|
| Early Ordovician 488-472 | Middle Ordovician 472-461 | Late Ordovician 461-444 | ||||
| Tremadocian 488-479 | Floian 479-472 | Dapingian 472-468 | Darriwilian 468-461 | Sandbian 461-456 | Katian 456-446 | Hirnantian 446-444 |
461 to 456 million years ago
The Sandbian, named for its reference section near Sandby, Sweden, is the first age of the Late Ordovician. It is a time of equable climate and biotic diversification.
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