1964年冬季,作者等至诸暨一带调查铅锌矿时,经过杭州,曾抽暇观察西湖附近的地质,发现该地构造相当复杂,岩层中折绉、冲断层及其他有关破裂很多。当时所见的主要折绉线计有两类:其一趋近南北方向,如天竺以东的天马山,千里岗砂岩反复湾曲,并且自东往西引起冲断,情形非常显著;其二走向北20°—30°东,也大多成为冲断层,首先在南高峰玉皇山等处所谓‘飞来峰灰岩’中见到。 In the winter of 1964, when the authors investigated the lead-zinc mine in the vicinity of Zhuji, after passing through Hangzhou, they had time to observe the geology near West Lake and found that the structure of the site was rather complicated. There were many crevices, thrust faults and other related ruptures in the rock formation. There were two main types of folding lines at that time: one approaching north-south direction, such as Tianmashan east of Tianzhu and Qirianggang sandstones repeated Bay song, which caused a breakage from east to west. The situation was quite remarkable. The second trend North 20 ° -30 ° East, but also most of the thrust fault, first in the southern peak of Jade Emperor Hill and other so-called ’fly peak limestone’ to see.