Paleomagnetic measurements demonstrate that the Jijiagou section which is the stratotype one of Baode Stage of the Neogene in China records 12 normal and 11 reversed polarity zones.
古地磁测量表明,中国新近系保德阶界线层型,山西保德冀家沟剖面记录了12个正极性段与11个负极性段。
So the Zhangjiagou section is an ideal candidate section for erecting the terrestrial stratotype and studying the Jurassic-Cretaceous boundary in China.