Changes

==Oil field example==

==Oil field example==

In [[:file:using-magnetics-in-petroleum-exploration_fig14-10.png|Figure 2]], also note the structural high apparent in Devonian strata about [[length::800 m]] (2500 ft) above basement in the West Campbell field, conveniently nestled between block boundaries. Block boundaries, i.e., shear zones, generally erode low, so it follows that the interiors of blocks must, in many cases, correspond to basement topographic highs. West Campbell field appears to be a case in point and is most likely underlain by such a basement topographic prominence, although there are no wells to basement here to document it. The culmination of structural closure nearer the north end of the block rather than at its center is probably due to the south dip of basement in this area.

In [[:file:using-magnetics-in-petroleum-exploration_fig14-10.png|Figure 2]], also note the structural high apparent in Devonian strata about [[length::800 m]] (2500 ft) above basement in the West Campbell field, conveniently nestled between block boundaries. Block boundaries, i.e., shear zones, generally erode low, so it follows that the interiors of blocks must, in many cases, correspond to basement topographic highs. West Campbell field appears to be a case in point and is most likely underlain by such a basement topographic prominence, although there are no wells to basement here to document it. The culmination of structural closure nearer the north end of the block rather than at its center is probably due to the south dip of basement in this area.