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Geography of the United States / United States / Iowa / Limestone / RAGBRAI / Nahant /  Massachusetts / Mississippi River / Fossiliferous limestone / Cement


Today’s ride is loaded with intriguing geologic features. The Iowa City - Clinton Fault Zone (western end of crosssection) is a similar fault system as the PRFZ that you rode over yesterday. Near the confluence
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Document Date: 2015-07-16 09:44:41


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