Siren6730 Siren6730

04-04-2020
Geography

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These are segments of the columnar stem of what fossil echinoderm animal? Each disk is a single crystal of calcium carbonate, and in life the animal's living tissue threaded through the hole passing through the stack of disks.

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abdullahfarooqi abdullahfarooqi

04-04-2020

Answer:

Crinoids.

Explanation:

These are segments of crinoids.

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