早侏罗世

The basin tectonic model: it is intermont basin during late Jurassic to early Cretaceous, developed into faulted-lacustrine basin in Eogene, and evolved into depression in Neogene and Quaternary.

“盆地”构造模式为：从晚侏罗世到白垩纪末期间“盆地”开始、展到早第三纪断陷湖盆、再演化为晚第三纪及第四纪地陷段。