雁荡山神奇的地质旅行

雁荡山世界地质公园于2005年2月12日经联合国教科文组织批准进入世界地质公园网络,它是迄今为止第一个以中生代火山地质地貌景观为主题的世界地质公园。雁荡山是亚洲大陆边缘区型火山带中白垩纪(距今约一亿年)破火山的杰出代表,是流纹质火山岩的天然博物馆。雁荡山一山一石记录了一座白垩纪复活型破火山的演化历史。中生代巨厚流纹质火山岩在外动力作用下形成的叠嶂、锐峰、柱峰、方山、石门、岩洞等组合,有别于我国花岗岩岩石地貌(如黄山)、碳酸岩岩石地貌(如桂林山水)和砂砾岩岩石地貌(如丹霞山、福建泰宁地质公园),这类流纹岩岩石地貌以雁荡山最为典型和完整,因而称为雁荡山地貌。

Mt.Yandangshan is a typical example of Late Mesozoic calderas and seems to a monumental work on Cretaceous caldera evolution in the Asian Continental Margin. MtYandangshan is a museum of rhyolite to study acidic magmatism,which provides volcanological and petrological evidences for the geodynamic processes during interaction between the Pacific Oceanic Plate and Euroasian Continental Plate. Mt. Yandangshan shows the evolving process of seaside rhyolite landscape--overlapped screen-like peaks, caves with unusual shapes and dropping waterfalls.Mt.Yandangshan belongs to a mountain vegetation zone, composed of broadleaf trees and fern plants. There is a great variety of seed plants there, also it is a producing type specimens of fern plants.