core lat lon depth core_sample actual_depth sulfate_mM P6 27.64728 -111.61432 1681 1 5 19.52 P6 27.64728 -111.61432 1681 2 30 12.37 P6 27.64728 -111.61432 1681 3 55 7.33 P6 27.64728 -111.61432 1681 4 105 1.94 P6 27.64728 -111.61432 1681 5 205 0.063 P6 27.64728 -111.61432 1681 6 255 0.514 P6 27.64728 -111.61432 1681 7 280 0.516 P6 27.64728 -111.61432 1681 8 305 0.483 P6 27.64728 -111.61432 1681 9 330 0.19 P6 27.64728 -111.61432 1681 10 355 0.591 P6 27.64728 -111.61432 1681 11 380 0.19