从宁夏北部卫星影像探讨黄河的发育

APPROACH TO TEE GROWTH OF YELLOW RIVER ACCORDING TO THE LANDSAT IMAGE OF NORTHERN NINGXIA

从宁夏北部卫星影像上发现，在宁夏石咀山至内蒙乌达之间，有一组古洪积扇被黄河所穿切， 经野外考察认为，该段黄河两岸的Ⅲ级阶地属晚更新世洪积侵蚀阶地，宁夏北部黄河发育于晚更 新世以后。

According to Landsat image, there is an ancient proluvial fan between Shizuishan, Ningxia and Wuda, Inner Mongolia, which is cut through by the Yellow River. The investigation in the field proves that the three stage terrace of the Yellow River is proluvial erosional terrace in late Pleistocene. So, the Yellow River growth was after late Pleistocene.