四川北川-茂县谷中谷地貌景观初探

Valley-in-Valley Landscape in Beichuan-Maoxian,Sichuan

本文提供茂县土地垭观看谷中谷景点及北川青石峡谷景点,并首次提出北川地区有第四纪冰川遗迹存在。在土地垭见湔江河谷明显的谷中谷景观,即上部横断面呈U形,属冰川槽谷;下部横断面呈V形,属河流侵蚀形成。岷江中段河谷具有类似景观。

This paper outlines the valley-in-valley landscape in the Tudiya,Maoxian and the Qingshi Gorge landscape in Beichuan and firstly describes vestige of the Quaternary glaciation.By 'valley-in-valley' is meant that the upper U-shaped valley(glacial trough) and lower V-shaped valley(erosion valley) in a valley section.There is the valley-in-valley landscape in the middle sector of the Minjiang River valley.