Fig. 1.. Oil & gas reservoirs and typical stratigraphic truncated unconformities in marine cratonic basins of China. Z₁d—Sinian Doushantuo Fm.; Z₂dn—Sinian Dengying Fm.; —C—Cambrian; —C₁q—Lower Cambrian Qiongzhusi Fm.; —C₁с—Lower Cambrian Canglangpu Fm.; —C₁l—Lower Cambrian Longwangmiao Fm.; O_1-2—Middle to Lower Ordovician; —C_2-3-O—Middle to Upper Cambrian-Ordovician; O₃—Upper Ordovician; S—Silurian; P—Permian; P₁—Lower Permian; T—Triassic; J—Jurassic; K₁s—Lower Cretaceous Shushanhe Fm.; K₁b—Lower Cretaceous Baxigai Fm.; K₁bs—Lower Cretaceous Bashijiqike Fm.; E_1-2km—Kumugeliemu Group Paleocene-Eocene; N+Q—Neogene+ Quaternary.

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