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How deeply did Ordovician invertebrates burrow into the seafloor?
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Ordovician Period
The distribution of landmasses, mountainous regions, shallow seas, and deep ocean basins during the Ordovician Period. Included in the paleogeographic reconstruction are the locations of the interval's subduction zones.
During the Ordovician Period, invertebrates burrowed into the seafloor with significantly greater intensity than they did during the Cambrian Period. These organisms reached depths of up to 1 metre (3.3 feet) below the seafloor.12