侵蚀平原又称石质平原。是一种非构造平原,当地壳处于长期稳定的情况下,崎岖不平的山地,在温度变化,风雨、冰雪和流水等外力剥蚀作用下,逐渐崩解破碎成碎粒。并被流水搬运山地慢慢夷平成低矮平缓的平原。
当一条河在平原地带形成了一个圈圈,侵蚀会造成互相挨得很近的两个河岸最终连在一起,使得河流有一条捷径。
When a river forms a loop on flat terrain, undercutting occurring on the riverbanks closest to each other can eventually connect the Banks, giving the river a shortcut.
为山前平原上的侵蚀孤丘,海拔约80多米。
For the piedmont plain on erosion solitary mound, at an altitude of approximately 80 meters.
二者的界面是相同的,均为河道砂体底部的冲刷侵蚀面或者是暴露过泛滥平原泥岩、根土岩等。
And the boundary of them has the same lithologic character: the ravinement surface of river course or exposure mudstone of flooding plain and root clay.
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