Mineral Encounters in Northeast Nebraska

Ionia Volcano

Tall, eroded river bank with layer of dark earth

Photo © John Jengo

For every Lewis and Clark scholar, aficionado, or casual trail traveler, there are portions of the Lewis and Clark Trail that hold a special meaning, where connections can be made to the captains, the enlisted men, the native cultures, the flora and fauna, or the landscapes that were so vibrantly memorialized in the expedition journals. Those whose interest lies in the earth science aspects of the expedition can readily retrace certain sections of the Trail by tracking down the geological features that Lewis and Clark visited, experienced, and described.

—John W. Jengo

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