In the Tathang and Yan Mountains, incised and meandering valleys formed in Quarternary.
太行山、燕山山地中的深切曲流河谷形成于第四纪。
Shiqu is a matter of the poor, by the bridge on the northwest mountains of soil Yam, the bridge also Yan.
石渠之事既穷，上由桥西北下土山之阴，民又桥焉。
Shiqu is a matter of the poor, by the bridge on the northwest mountains of soil Yam, the bridge also Yan.
石渠之事既穷，上由桥西北下土山之阴，民又桥焉。
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