| 1. | The bedrock is mainly of Precambrian and Cambro-Silurian origin.
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| 2. | These rocks are 414 million years old from the Silurian period.
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| 3. | The younger date is from the early Silurian Birkhill shale formations.
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| 4. | The Sea Devils and Silurians do not appear in this story.
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| 5. | The age is of Late Wenlock epoch or early Late Silurian.
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| 6. | Late Silurian to early Devonian intrusions could also be volcanic necks.
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| 7. | Middle Silurian Colinton Volcanics foliated dacite and tuff is under Williamsdale.
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| 8. | The Silurian Shawangunk conglomerate lies on top of the Martinsburg formation.
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| 9. | The Silurian spanned from 443 to 419 million years ago.
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| 10. | He divided the Silurian rocks of Bohemia into eight stages.
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मोबाइल