Q1:A geophysical survey was conducted using the gravitational method in the north of Diyala Governorate to study the structural and subsurface geological formations. The results were recorded as in the table below The survey path runs east-west at latitude (34 00' 00 ). The average density of subsurface rocks is equal to (2.5) kg/m3. The topographic correction is equal to (4/1) the free air correction. Explain the Bogger anomaly curve? Sta. No. Time Dist Height Sobs gA hA F.A.C. T.C. B.C. B.A. m. m. mgal mgal M mgal mgal mgal Mgal 8:10 0.00 210 57.9 2 8:20 50 245 58.3 3 8:30 100 280 59.0 8:40 150 305 60.0 8:50 200 325 62.0 9:00 250 345 64.7 7 9:10 300 350 66.7 9:20 350 310 73.0 9:30 400 290 77.0 10 9:40 450 250 76.6 1 1 9:50 500 240 77.1 12 10:00 550 230 77.3