Dokdo is the world's geological heritage
As mentioned above,
Dokdo is a volcanic island that was formed during the Pliocene in the 3rd
phase of the Cenozoic Era, between about 4.6 million to about 2.5 million years
ago. Thus, Dokdo is much older than Ulleungdo Island (about 2.5 million-10,000
years ago) and Jejudo Island (about 1.2 million-10,000 years ago).
Considering its age, Dokdo is like a big brother to Ulleungdo and Jejudo.
If 'The waters of East Sea dry up and the soils of Mt. Baekdu blow away,'
as the Korean Anthem sings, Dokdo would no longer be a small rock island,
but the tip of a massive mountain that is about 2,000 in height.
Geologically, Dokdo is a volcanic island that is formed by lava from underwater
volcanic eruptions of the East Sea.
Originally, Dongdo and Seodo were not divided as they are today.
Geologically, Dokdo is a volcanic island that is formed by lava
from underwater volcanic eruptions of the East Sea.
Through millions of years, the rock island has been eroded and weathered by waves and winds.
Marine erosion of waves: Marine erosion has formed sharp and steep sea cliffs. In addition, Seodo has formed wave-cut
platforms on the north and west shores.
With its unique geological structure, Dokdo is geographically very important.
Dokdo is the collection of rocks that is composed of tracyte, andesite, and intrusive rocks.
These rocks are formed when pillow lava and cataclastic breccia, the residues broken by fast cooling, pile up underwater
and explode near the surface of water to meet the atmosphere. Dokdo is a rare example of underwater mountain
that is exposed above the surface of water.
Due to maritime erosion and sedimentation, it is very difficult for these maritime creations to retain their original shapes.
However, Dokdo is the world's geological heritage that clearly shows how this underwater mountain has evolved.
Dokdo has been certified as the first national geological park with Ulleungdo and Jejudo by the Korean Ministry of Environment on December 2012 because of its unique geological structure. The Ministry of Environment has designated 4 geological sites on Dokdo that hold significance and have geographic and educational value, and also has managed and preserved its territory to promote tourism and development of regional economies.