摘要
缙云仙都是一个以火山地质景观为特色 ,融田园风光与人文史迹为一体的国家级重点风景名胜区。不同时代 ,不同类型的火山岩和火山活动 ,形成不同的火山地貌 ,构成一幅九曲练溪的十里画廊。本文特别介绍了新近发现的一个小型火山颈———步虚山凌虚洞火山通道 。
Xiandu'of Jinyun county is an important scenic spot of the nation characterized by its landscape of volcanic geology and integrated the pastoral scenery with historic relics.Different types of volcanic rocks formed different scenery and landscape.The Dinghufeng Peak,170m high,towers over the Haoxi cor Lianxi River,and the Lingxu Cave is a volcanic conduit split by joints and fissures.Studies revealed that the peaks,caves and canyons were formed under a special geological background,which was chara ctenzed by gentle occurrences of rock beds,developed vertical joints and big lithological variations between different ore beds(rhyolite and tuff).Isotopic dating showed that the rhyolite in this area was formed in late stage of Lower Cretaceous (about 110Ma) and the leishan dorgalite was formed in Miocene Epoch of Neogene(9.3Ma).
出处
《浙江地质》
2001年第1期77-80,共4页
Geology of Zhejiang
关键词
火山地貌景观
古火山
白垩纪
缙云仙都
Volcanic landscape, Paleovolcano, Cretaceous Period, Jinyun county of Zhejiang Province
