| 1. | From here, ocean floor turbidite deposits occurred in the Ordovician period.
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| 2. | These nektobenthic carnivores lived in the Ordovician period, from 478.6 to 449.5 Ma.
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| 3. | Cephalopods became dominant during the Ordovician period, represented by primitive nautiloids.
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| 4. | The Navatrasierra Shale Formation from the Ordovician period, is named after this town.
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| 5. | These nektobenthic carnivores lived in the Ordovician period, from 466.0 to 443.7 Ma.
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| 6. | Morphologically, the rhynchonellid has changed little since its appearance during the Ordovician period.
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| 7. | These nektobenthic carnivores lived in the Ordovician period, from 488.3 to 443.7 Ma.
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| 8. | Bryozoans have contributed to carbonate sedimentation in marine life since the Ordovician period.
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| 9. | In the late Ordovician period, Avalonia collided with Baltica creating the Tornquist Margin.
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| 10. | Siliclasitc and carbonate deposition continued through the Cambrian and into the Ordovician period.
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मोबाइल