Cambrian Explosion and Ordovician Radiation

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4 Terms

1
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Were the coastlines of Laurentia active or passive margins during the Cambrian Period?

Passive

2
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Were the coastlines of Laurentia active or passive margins during the Ordovician Period?

Both

3
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Why was so much sediment being produced and delivered to Laurentia’s coastlines during the Cambrian Period?

Sea level rise and thermal subsidence

4
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Define motility

Ability to move