 When plate tectonic reconstructions are used to plot the global distribution of Silurian reefs, their latitudinal occurrence shows a striking similarity to that of modern reefs. In comparing the two maps below, note also that shallow seas were much more widespread in Silurian time, while land areas occupy more of the globe today.
 Reconstruction of the Silurian world, with generalized distribution of reefs shown in red. Note that most Silurian reefs also occurred between 30 degrees North latitude and 30 degrees South latitude.
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