A small crinoid barge, formed by sea lilies attaching themselves to the bottom of floating driftwood. These things unfortunately do not exist anymore, as the evolution of shipworms (a type of wood-consuming bivalve) has strongly reduced the amount of driftwood in our oceans.
Awesome speculation! Wouldn't be surprised if such things did exist, in the deep past.
ReplyDeleteThis isn’t speculation. These things really did exist. There’s fossils of whole such floating reefs found in places like Holzmaden’s Posidonia Shale.
DeleteWow, that is so cool!
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