Geologic Map of Apostle Islands NL

Lanphier, Kari

The map was produced by Kari Lanphier (Colorado State University) in June 2015. It is an overview of compiled geologic data prepared as part of the NPS Geologic Resources Inventory. This map is not a substitute for site-specific investigations. The source maps used in creation of the digital geologic data was: Cannon, W. F., L. G. Woodruff, S. W. Nicholson, C. A. Hedgman, and R. D. Barber-Delach. 1999. Digital bedrock geologic map of the Ashland and northern part of the Ironwood 30' x 60' quadrangles, Wisconsin, and Michigan. 1:100,000 scale. Open-File Report OF-99-546. US Geological Survey, Reston, Virginia. Nicholson, S. W., W. F. Cannon, L. G. Woodruff, and C. L. Dicken. 2004. Bedrock geologic map of the Port Wing, Solon Springs, and parts of the Duluth and Sandstone 30' x 60' quadrangles, Wisconsin. 1:100,000 scale. Open-File Report OF-2004-1303. US Geological Survey, Reston, Virginia. Nicholson, S. W., C. L. Dicken, M. P. Foose, and J. Mueller. 2004. Integrated geologic map databases for the United States, the upper Midwest states: Minnesota, Wisconsin, Michigan, Illinois, and Indiana. 1:500,000 scale. Open-Fil. Clayton, L. 1985. Pleistocene geology of the Superior Region, Wisconsin. 1:250,000 scale. Regional Map Series 3.Wisconsin Gtandards, geologic features represented here are within 50 m (166 ft) (1:100,000 scale) or 254 m (833 ft) (1:500,000 scale) of Inventory are available at the NPS Integrated Resource Management Applications Portal (IRMA): https://irma.nps.gov/App/Refereni5olarv Re, Virginiaeological and Natura Natp Ache Report OF-2004-135. US Geogicl Suey, ston HistorySurvy, Madisn, Wiscon. As pource map scale and U.S.ional Macuracy Stheir true locatl digital geologand publicationspared as part of Geologic Resource/Search. Enter “GRI” as the search text and select a park from the unit list.sl eonsier sion. Alic data pre theces