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Allogenic and authigenic sediments at Cave of the Winds can be correlated to nearby sediments. The allogenic sediments, which consist of clay, silt and sand, are correlated to the Nussbaum Alluvium. Magnetostratigraphy of the cave sediments combined with the aminostratigraphy of alluvial terraces in the Manitou Springs area indicate that the Nussbaum Alluvium is ~1.9 Ma and that the major episode of sedimentation in Cave of the Winds started ~4.5 Ma and stopped ~1.5 Ma.

The authigenic sediments, which consist of iron and manganese oxides, are correlated to similar modern spring sediments. The spring sediments along with the chemistry...

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