Adirondack Mountains On Us Map
https://www.researchgate.net/profile/William_Peck/publication/227113224/figure/fig5/AS:668492319715338@1536392397472/Magnetic-anomaly-map-of-the-northeastern-part-of-the-Adirondack-Mountains-New-York.png 7 Magnetic Anomaly Map Of The Northeastern Part Of The Adirondack