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| Artists Impression of the Silurian Fish |
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| A Middle Silurian Plant |
The Silurian Period lasted from 444 mya- 416 mya. This period enjoyed a relatively stable and temperate climate unlike the glaciers from its predecessor. Layers of broken shells reveal a climate dominated by powerful storms generated by the warm sea-surface, as Earth entered a green-house phase. During the Silurian Period, the first bony fish appeared, covered in bony scales. Fish diversified enormously and developed jaws. The first fossils of vascular plants appeared in the second half of the Silurian period. A primitive Silurian land plant with xylem
and phloem
but no differentiation in root, stem or leaf, was much-branched Psilophyton, reproducing by spores
and breathing through stomata
on every surface, and probably photosynthesizing in every tissue exposed to light.
Events that Happened in the Silurian Period.
