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Cluster analysis of data from county soils reports and from aerial photographs produced three regions with distinctly different assemblages of glacial landforms. The northern region is composed of bogs, kames, terraces, and crossheated to circular feature ice-stagnation moraine. The central region is characterized by level, poorly drained soil and nonpatterned ground moraine. The marginal region consists of heated to cross-lineated ice stagnation features. These clusters are associated with differences in the bedrock topography. The success of this study in defining coherent, logical clusters of counties with similar landforms indicates that the landform data available in county soils reports can be employed in regional analysis even when using county-sized sample cells if the study does not require the establishment of definitive regional boundaries. HE Des Moines drift sheet in north-central

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