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In summer 2025, the USGS flew low-altitude surveys in Michigan and Wisconsin to map underground geology for critical minerals and resources.
In summer 2025, the U.S. Geological Survey conducted a large-scale aerial survey over Michigan’s Upper Peninsula and northern Wisconsin using low-flying aircraft equipped with passive magnetic, radiometric, and electromagnetic sensors.
The mission, part of the Earth Mapping Resources Initiative, collected high-resolution data to map subsurface geology to depths of about 10,000 feet across counties including Alger, Marquette, and Schoolcraft in Michigan, and Vilas, Iron, and Florence in Wisconsin.
Flights flew at roughly 330 feet with lines spaced 500 to 1,300 feet apart, gathering data that will replace outdated information and support improved assessments of critical minerals, water resources, and land use.
The data, managed by federal contractors and analyzed by scientists from Western Michigan University and state geological surveys, will be publicly available on ScienceBase and used for hazard evaluation, infrastructure planning, and environmental management.
En el verano de 2025, el USGS realizó sondeos a baja altitud en Michigan y Wisconsin para mapear la geología subterránea en busca de minerales y recursos críticos.