The general structure and the type of prospects which have resulted from aerial magnetometer surveys and seismic work, including the location of the major evaporite basins of Permo-Triassic age, are now known. The expanded sedimentary column in the north and east, which probably includes a thick Tertiary sequence, and the occurrence of major unconformities may now be evaluated.

The general stratigraphic sequence is illustrated by reference to some of the first holes drilled in the western (British) sector of the North Sea.

End_of_Article - Last_Page 620------------