Keokuk Limestone

The Keokuk Limestone is a geologic formation in Illinois, Iowa and Missouri. It preserves fossils dating back to the Mississippian sub-period.

单词	Keokuk Limestone
释义	Keokuk Limestone 英语百科 Keokuk Limestone The Keokuk Limestone is a geologic formation in Illinois, Iowa and Missouri. It preserves fossils dating back to the Mississippian sub-period.
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