Table T18. Differences between depths to key horizons and corrected depths.

Seismic horizons	Predicted intersection (mbsf)	Check-shot corrected depth (mbsf)	Difference (m)
Base of Sequence 2	39	~46
Intra-Sequence 3 Horizon	103	113	+10
Base of Sequence 3	147	158	+11
Top of Sequence 6A	205	213	+8
Top of Sequence 6A, Lobe 2	264	272	+8
Base of Cenozoic	361	370	+9
Intra-Cenomanian Horizon	432

Notes: Predicted intersection depths were derived using high-resolution site-survey seismic data stacking velocities. Corrected depths were based on check-shot data and interval transit-time (ITT) data.