Montana aeromagnetic and gravity maps and data

Online link http://pubs.usgs.gov/of/1998/ofr-98-0333/mt.html
Description Aeromagnetic surveys of Montana, merged to form seamless grids across the state. Gravity anomaly data are provided as well.
Originators McCafferty, Anne E.; Bankey, Viki; and Brenner, K. C.
Publication U.S. Geological Survey Open-File Report 98-333

States or counties

Montana aeromagnetic anomaly map
Montana aeromagnetic anomaly map