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Quaternary Geologic Map of the Lake Superior 4° x 6° Quadrangle, United States and Canada

The Quaternary Geologic Map of the Lake Superior 4° x 6° Quadrangle was mapped as part of the Quaternary Geologic Atlas of the United States. The atlas was begun as an effort to depict the areal distribution of surficial geologic deposits and other mate

Geology and Mineral Deposits of the Keweenaw Peninsula and Vicinity, Michigan

The area of this data set includes the classic geology and mineral deposits of the Keweenaw Peninsula, renowned for the occurrence of great volumes of Middle Proterozoic flood basalts and the world's largest concentration of native copper. Native copper

Digital Geologic Map of the Penokean Continental Margin, Northern Michigan and Wisconsin

The data on this CD consist of geographic information system (GIS) coverages and tabular data on the geology of Early Proterozoic and Archean rocks in part of the Early Proterozoic Penokean orogeny. The map emphasizes metasedimentary and metavolcanic rock