Andesitic Lava of Jeungsimsa Valley

The basalt found in the Jeongsimsa Valley is composed of andesitic pyroclastic rocks and andesite, along with granite that intruded into them. White chalcedony or green chlorite, appearing as oval-shaped inclusions, are found within the andesite. The formation of the basalt in this region is interpreted as a process where pyroclastic deposits accumulated due to volcanic eruptions, forming pyroclastic rocks, and andesite was formed by the solidification of lava erupted in a liquid state. This process was repeated multiple times, followed by the intrusion of a fine-grained granite.

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