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Superior Mineral Ranges

Ecoregion in WI, MI

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The rolling to hilly, bedrock-controlled and collapsed moraines consisting of loamy till, much of it shallow over igneous and metamorphic rock, distinguish the Ontonagon Lobe Moraines and Gogebic Iron Range (50d) ecoregion from surrounding regions. Rock outcrops increase from very few in the southern portion of this ecoregion to abundant in the north. Likewise, the topography changes from rolling in the southern portion to hilly in the north. Perennial streams are common, and there are fewer lakes than in ecoregions to the south, but more than adjacent ecoregion 50a. The PNV of 50d is a mosaic of hemlock/sugar-maple/pine forests, swamp conifers, and cedar/hemlock forests. This represents a transition from the boreal forests of ecoregion 50a to the mix of hardwoods and conifer forests of ecoregion 50e. Historic mining of iron and copper occurred along the northern and northwestern edge of this region.

— EPA

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