In Late Mesozoic, the evolution of the Songliao basin progressed through 4 stages: thermal doming, rifting, depression and shrinkage. Corresponding to the late three stages: it developed three biotas, Jehol biota, Sungari biota and Mingsui biota.

• 松辽盆地晚中生代经历了热隆张、裂陷、坳陷和萎缩4 个地质演化阶段，后3 个阶段相应发育了三大生物群，即热河生物群、松花江生物群和明水生物群。