A synthesis of current Mississippi period research from an area outside the traditional Mississippian heartland.
从一个地区综合研究当前密西西比州时期传统密西西比以外的中心地带。
Silurian '. 'and before the Mississippian or Carboniferous Period, and characterized by the appearance of forests and amphibians.
处于志留记之后，密西西比纪或石炭纪之前，森林和两栖类的出现是其特征。
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