Regional map of the Tibetan Plateau and (b) schematic tectonic map of the area around Guide showing the major structural features, mountain ranges (dense stipple) and the Gonghe-Guide Basin (light stipple).
Longyang Gorge, from the West Neogene sediments at the "Guide Gate", NE of Guide.
 
 
 
 

Magnetostratigraphic results from the Herjia section, N of Guide. Some representative thermal demagnetization diagrams for both normal and reverse magnetization are shown.