 On the other hand, Lyatsky (1993, 2006) considered significant strike-slip movements to be impossible in this basin since at least the Late Oligocene, based on kinematic indicators and cross-cutting relationships of major faults and dated dikes; instead, he viewed the basin's Cenozoic evolution to be a product of reactivation of older networks of block-bounding faults.Economic basement in the Queen Charlotte Basin area is massive, thick Upper Triassic flood basalts, underlain onshore by partly metamorphosed older rocks.Above, high-quality source rocks exist in the ~-thick Upper Triassic-Lower Jurassic assemblage, with oil-prone Type I and II kerogen and TOC (total organic carbon) up to 11%.