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Volcanic Geologic Remains
Source:Leiqiong Global Geopark of China Time:2013-07-10 19:40:25

Volcanic Geologic Remains

Volcanic Geologic Remains

The volcanoes of Quaternary Period in the Leizhou Peninsula exhibit themselves mainly as continental eruptions of central type, bringing about basaltic quilt and volcanic cones that are scattered all over like stars in the sky or the pieces on the chessboard. Well-preserved volcanic cones are located in the skirting areas of Huguangyan like Chengliling, Bijialing, Luogangling, etc. When looked at in plane, the paleovolcanic edifices occur as round-shaped or elliptical and in the meanwhile pyroclastic rocks are spread as surrounding craters in ring-like or semi-ring-like manner. On top of all these, volcanic dome structure has been proved existing in the area neighbouring the Tuxiu Lake southeast of this geopark, which is an arched uplift due to magmatic substances moving upwards.

Developed at Huguangyan, Yingfengling as located north of Oceanography University and Qingtongyang are the joint fissures in the mid-part of the pyroclastic rocks which may be divided into two major sets: (1) trending NW, dipping NE, with dip angle ranging between 60°and 80°, but partially very close to perpendicular state; (2) trending NE, dipping SE, with dip angle going from 70°to 80°, but partially verging on standing. The joint planes look slightly tensile, and most of them are filled with mud materials.