A Middle Pennsylvanian macrofloral assemblage from below the Rock Island (No. 1) Coal Member, Illinois: Resolving the Bolsovian-Asturian boundary in the Illinois Basin
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- 作者：Arden R. Bashfortha ; b ; bashfortha@si.edu" class="auth_mail" title="E-mail the corresponding author ; W. John Nelsona ; jnnelson@illinois.edu" class="auth_mail" title="E-mail the corresponding author
- 关键词：Bolsovian ; Asturian ; Atokan ; Desmoinesian ; Macroflora ; Biostratigraphy
- 刊名：Review of Palaeobotany and Palynology
- 出版年：2015
- 出版时间：November 2015
- 年：2015
- 卷：222
- 期：Complete
- 页码：67-83
- 全文大小：7186 K
文摘
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A Middle Pennsylvanian macrofloral assemblage is documented from the Illinois Basin.
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Medullosalean pteridosperms dominate the assemblage.
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Biostratigraphic comparisons with Europe and eastern USA yield an (early) Asturian age.
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The Bolsovian–Asturian boundary precedes the Atokan–Desmoinesian boundary.
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Protracted environmental change occurred near these boundaries across Euramerica.