mapped, edited, and published by the Geological Survey in cooperation with the Iowa Geological Survey.Geological Survey[1984]<YG1-U-Iowa-2.4-2166-2-SE>
mapped, edited, and published by the Geological Survey in cooperation with the Iowa Geological Survey.Geological Survey[1984]<YG1-U-Iowa-2.4-2067-3-SW>
mapped, edited, and published by the Geological Survey in cooperation with the Iowa Geological Survey.Geological Survey[1984]<YG1-U-Iowa-2.4-2166-4-NE>
mapped, edited, and published by the Geological Survey in cooperation with the Iowa Geological Survey.Geological Survey[1984]<YG1-U-Iowa-2.4-2166-1-NE>
mapped, edited, and published by the Geological Survey in cooperation with the Iowa Geological Survey.Geological Survey[1984]<YG1-U-Iowa-2.4-2166-2-SW>
mapped, edited, and published by the Geological Survey in cooperation with the Iowa Geological Survey.Geological Survey[1984]<YG1-U-Iowa-2.4-2166-4-SW>
mapped, edited, and published by the Geological Survey in cooperation with the Iowa Geological Survey.Geological Survey[1984]<YG1-U-Iowa-2.4-2166-1-SW>
mapped, edited, and published by the Geological Survey in cooperation with the Iowa Geological Survey.Geological Survey[1984]<YG1-U-Iowa-2.4-2166-1-SE>
mapped, edited, and published by the Geological Survey in cooperation with the Iowa Geological Survey.Geological Survey[1984]<YG1-U-Iowa-2.4-2166-2-NE>
mapped, edited, and published by the Geological Survey in cooperation with the Iowa Geological Survey.Geological Survey[1984]<YG1-U-Iowa-2.4-2166-1-NW>
mapped, edited, and published by the Geological Survey in cooperation with the Iowa Geological Survey.Geological Survey[1984]<YG1-U-Iowa-2.4-2166-2-NW>
mapped, edited, and published by the Geological Survey in cooperation with the Iowa Geological Survey.Geological Survey[1984]<YG1-U-Iowa-2.4-2166-4-SE>
mapped, edited, and published by the Geological Survey in cooperation with the Iowa Geological Survey.Geological Survey[1984]<YG1-U-Iowa-2.4-2067-3-NW>
mapped, edited, and published by the Geological Survey in cooperation with the Iowa Geological Survey.Geological Survey[1984]<YG1-U-Iowa-2.4-2067-3-SE>
mapped, edited, and published by the Geological Survey in cooperation with the Iowa Geological Survey.Geological Survey[1984]<YG1-U-Iowa-2.4-2067-3-NE>
mapped, edited, and published by the Geological Survey in cooperation with the Iowa Geological Survey.Geological Survey[1984]<YG1-U-Iowa-2.4-2166-4-NW>
mapped, edited, and published by the Geological Survey in cooperation with the Iowa Geological Survey.Geological Survey[1983]<YG1-U-Iowa-2.4-2168-2-NW>