Cretaceous rocks, deposited near their provenance areas, tend to be petrologically immature, and secondary porosity in them may be hard to predict.
2.
Economic basement in the Queen Charlotte Basin area is massive, thick Upper Triassic flood basalts, underlain onshore by partly clastic succession, ~ thick, has negligible source potential but contains high-quality reservoirs with largely secondary porosity of ~ 15 % or more.
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