These USGS employees contributed to reformatting and archiving these data: Viki Bankey, Pat Hill, Holly Hindle, Bob Kucks, Sarah Shearer, Esther Castellanous
Aeromagnetic surveys are used for geophysical prospecting. Some variations in magnetic measurements are caused by rocks that contain significant amounts of magnetic minerals (magnetite being the most common). These anomalies reflect variations in the amount and type of magnetic material and the shape and depth of the body of rock. The features and patterns of aeromagnetic anomalies can also be used to delineate details of subsurface geology including the locations of buried faults and the thickness of surficial sedimentary rocks.
Are there legal restrictions on access or use of the data?
Use_Constraints:none. Acknowledgement of the U.S. Geological Survey would be appreciated in products derived from these data.
Although all data published on this website have been used by the USGS, no warranty, expressed or implied, is made by the USGS as to the accuracy of the data and related materials. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of these data or related materials. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
|Data format:||ASCII Each line contains data in the following format, beginning with line 1 (no header included): longitude F12.4 Longitude in decimal degrees latitude F12.4 Latitude in decimal degrees mag F8.1 Magnetic value represented on map. This is the total field value with an arbitrary datum removed|
http://crustal.usgs.gov/geophysics/index.html for link to report