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Boulder field, Newton Township, Iowa, late 1890s or early 1900s

Boulder field, Newton Township, Iowa, late 1890s or early 1900s

Boulder of Iowan age, near the southeast corner of the park, Nora Springs, Iowa, late 1890s or early 1900s

Boulder of Iowan age, near the southeast corner of the park, Nora Springs, Iowa, late 1890s or early 1900s

Boulder of Iowan age, near the southeast corner of the park, Nora Springs, Iowa, late 1890s or early 1900s

Boulder of Iowan age, near the southeast corner of the park, Nora Springs, Iowa, late 1890s or early 1900s

Boulders from the marginal moraine of the Wisconsin Drift Sheet, Clear Lake, Iowa, late 1890s or early 1900s

Boulders from the marginal moraine of the Wisconsin Drift Sheet, Clear Lake, Iowa, late 1890s or early 1900s

Boulders from the marginal moraine of the Wisconsin Drift Sheet, Clear Lake, Iowa, late 1890s or early 1900s

Boulders from the marginal moraine of the Wisconsin Drift Sheet, Clear Lake, Iowa, late 1890s or early 1900s

Boulders of disintegration showing effects of weathering on granite, between Loveland and Estes Park, Colorado, late 1890s or early 1900s.

Boulders of disintegration showing effects of weathering on granite, between Loveland and Estes Park, Colorado, late 1890s or early 1900s.

Boulders of disintegration showing effects of weathering on granite, between Loveland and Estes Park, Colorado, late 1890s or early 1900s.

Boulders of disintegration showing effects of weathering on granite, between Loveland and Estes Park, Colorado, late 1890s or early 1900s.

Boulders on Iowan Plain, Independence, Iowa, late 1890s or early 1900s

Boulders on Iowan Plain, Independence, Iowa, late 1890s or early 1900s

Located east of Independence.

Boulders on Iowan Plain, Independence, Iowa, late 1890s or early 1900s

Boulders on Iowan Plain, Independence, Iowa, late 1890s or early 1900s

Located east of Independence.

Bound to catch it no matter what he said.

Bound to catch it no matter what he said.