This time period took place 359 to 299 million years ago. 3 min read The Carboniferous period, part of the late Paleozoic era, takes its name from large underground coal deposits that date to it.

The spiny legged 308-million-year-old arachnid Douglassarachne acanthopoda was discovered the famous Mazon Creek locality. More than 300 million years ago, all sorts of arachnids crawled around the ...

More than 300 million years ago, during the Carboniferous Period, much of northern Illinois outside Chicago — including what is now the Mazon Creek (“muh-ZAHN”) fossil site — was alive with ancient ...

More than 300 million years ago, all sorts of arachnids crawled around the Carboniferous coal forests of North America and Europe. These included familiar ones we’d recognize, such as spiders, ...

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Abstract Based on the strata, lithologic association and coal-bearing property – using the method of synthetic correlation – the relation between limestone layers and the thick coal seam of the ...

Geological Society, March 25.-John Evans, F. U.S., president, in the chair.-The following communications were read: -On the Upper Coal-Formation of Eastern Nova Scotia and Prince Edward Island, in its ...