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<p style='box-sizing:border-box; margin-top:0px; margin-bottom:0.0001pt; padding:0px; font-size:12px; line-height:normal; color:rgb(0, 0, 0); font-family:"Avenir Light", Verdana, Geneva, sans-serif; background-image:initial; background-position:initial; background-size:initial; background-repeat:initial; background-attachment:initial; background-origin:initial; background-clip:initial;'><span style='box-sizing:border-box; font-family:Verdana, sans-serif; color:rgb(27, 27, 27);'><b><u><font size='4' style='box-sizing:border-box;'>USGS geophysical grids</font></u></b></span></p><p style='box-sizing:border-box; margin-top:0px; margin-bottom:0.0001pt; padding:0px; font-size:12px; line-height:normal; color:rgb(0, 0, 0); font-family:"Avenir Light", Verdana, Geneva, sans-serif; background-image:initial; background-position:initial; background-size:initial; background-repeat:initial; background-attachment:initial; background-origin:initial; background-clip:initial;'></p><ul><li><a href='https://pubs.usgs.gov/of/2000/ofr-00-0198/html/wy_boug.htm' style='box-sizing:border-box;' target='_blank'>Complete Bouguer gravity anomaly</a> (WY only)<br /></li><ul><li><font color='#333333' face='Helvetica Neue, Helvetica, Arial, sans-serif' style='box-sizing:border-box;'>The complete-Bouguer gravity anomaly grid was compiled using data from over 23622 gravity stations in and adjacent to the state of Wyoming. These data were extracted from the gravity data base maintained by the National Geophysical Data Center (from Department of Defense unclassified data) (Hittleman and others, 1994) and augmented with data from the USGS and from several university theses and dissertations. </font><br /></li></ul><li><a href='https://mrdata.usgs.gov/magnetic/' style='box-sizing:border-box;' target='_blank'>Isostatic residual gravity anomaly</a> (WY only)<br /></li><ul><li><font color='#1b1b1b' face='Verdana, sans-serif' size='2' style='box-sizing:border-box;'>The colors on this isostatic gravity map reflect variations in the Earth's gravity field caused primarily by lateral variations in density in the rocks that make up the upper part of the Earth's crust. An isostatic gravity grid was derived from Bouguer and free-air gravity anomaly data. This grid was created by removing from the Bouguer gravity grid a model of the gravity expression caused by deficiencies in mass (compensating mass) that supports topographic loads.</font><br /></li></ul><li><a href='https://pubs.usgs.gov/of/2000/ofr-00-0198/html/wyoming.htm' style='box-sizing:border-box;' target='_blank'>Total-field Magnetic anomaly</a> (WY only)<br /></li><ul><li><font color='#1b1b1b' face='Verdana, sans-serif' size='2' style='box-sizing:border-box;'>Wyoming Merged Aeromagnetic Anomaly Map (NE illumination)</font></li></ul></ul> |