质疑粤西北的冰川遗迹

A QUERY ABOUT THE GLACIAL TRACES IN NORTHWEST GUANGDONG

从地貌、沉积物、第四纪地层关系、古气候、古环境等方面论证了广东封开—怀集一带所谓的冰川谷、冰蚀三角面、悬谷、角峰、刃脊、冰斗、鼻山尾、冰碛砾石、蛇形丘以及近百万年来发生过 3次冰期 ,是既不符合地学基础理论也不符合野外实际 ,所以是不确实的。那里没有第四纪冰川遗迹。

The so called “glacial valley” in Fengkai Huaiji of Guangdong is actually a corrosion erosion valley in relation to lithology and tectonic, the “moraine gravels” are actually alluvial or pluvial alluvial gravels, and the “eskers” are actually sandshale terraces. So called “glaciated trigonometry face”, “glacial hanging valley”, etc. are all false. There are no glacial horn, arete, corrie on the Dang Mountain that is 700m lower than Mt. Shikengkong, the highest peak in Guangdong. Below Jinzhuang plain, there are no Q 1 and Q 2 sediment and so called 3 stages moraine deposit, but limestone teeth are in sight, showing the valley was not eroded by glacier. Warm and moist environment is yet reflected in the sporopollen of so called Denggaoling glacier mud and gravel. Warm and damp climate during the glacial epoch is reflected in the sporopollen of Zhanjiang Fm. and Xuwen and Beihai Fm. in Zhanjiang. Moreover, in Deqing and Fengkai, the thickness of red weathering crust is from 10m to several tens m on many hills and terraces, where deep gullies develop Limestone tip peaks are extensively distributed from Qiaotou to HYe′erkou. Incised meanders are located from Nanfeng to Jiangkou along the Hejiang. Those are all evidences which indicate that there is no Quanternary glacial trace in the northwest of Guangdong.