In the present work, sequence-paleogeographic mapping is implemented on the s econd member of the Upper Triassic Xujiahe Fm. and the Upper Jurassic Ponlaizhen g Fm. in western Sichuan, China, with system tracks taken as the mapping units.

• 研究重点选择上三叠统须家河组二段和上侏罗统蓬莱镇组，按体系域进行层序-岩相古地理编图。