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Pleistocene, loess sections, Natchez, Miss., late 1890s or early 1900s

Pleistocene, loess sections, Natchez, Miss., late 1890s or early 1900s

Pleistocene, loess sections, Natchez, Miss., late 1890s or early 1900s

Pleistocene, loess sections, Natchez, Miss., late 1890s or early 1900s

Pleistocene, loess sections, Natchez, Miss., late 1890s or early 1900s

Pleistocene, loess sections, Natchez, Miss., late 1890s or early 1900s

Pleistocene, loess sections, Natchez, Miss., late 1890s or early 1900s

Pleistocene, loess sections, Natchez, Miss., late 1890s or early 1900s

Pleistocene Fauna, Ursus americana, late 1890s or early 1900s

Pleistocene Fauna, Ursus americana, late 1890s or early 1900s

Pleistocene Fauna, Ursus americana, late 1890s or early 1900s

Pleistocene Fauna, Ursus americana, late 1890s or early 1900s

Pleistocene Fauna, upper and lower molars of Equus scotti, the Gladwin horse, late 1890s or early 1900s

Pleistocene Fauna, upper and lower molars of Equus scotti, the Gladwin horse, late 1890s or early 1900s

Horse molars

Pleistocene Fauna, upper and lower molars of Equus scotti, the Gladwin horse, late 1890s or early 1900s

Pleistocene Fauna, upper and lower molars of Equus scotti, the Gladwin horse, late 1890s or early 1900s

Horse molars

Pleistocene Fauna, side view of well worn molar, 6th superior, right side, Mastodon mirificus Leidy, from well (well went down through Kansan Drift), Akron, Iowa, late 1890s or early 1900s

Pleistocene Fauna, side view of well worn molar, 6th superior, right side, Mastodon mirificus Leidy, from well (well went down through Kansan Drift), Akron, Iowa, late 1890s or early 1900s

Pleistocene Fauna, side view of well worn molar, 6th superior, right side, Mastodon mirificus Leidy, from well (well went down through Kansan Drift), Akron, Iowa, late 1890s or early 1900s

Pleistocene Fauna, side view of well worn molar, 6th superior, right side, Mastodon mirificus Leidy, from well (well went down through Kansan Drift), Akron, Iowa, late 1890s or early 1900s