The Ipseokdae Colonnade is located southwest of Mudeungsan Peak, about
950m above sea level. It belongs to the Natural Monument No. 465 along
with Seoseokdae Colonnade (1,050m), which is 400m far to the north. The
Colonnade comprises about 40 polygonal columns of 1 to 2m widths, lined
with about 120meters east and west. The rock composition of the colonnade is
a volcanic rock called Mudeungsan Tuff, which erupted about 85 million years
ago. On the upper part of the colonnade, there is a unique shape of rock called
Seungcheonam, which appears rising to the sky as the stone pillars are tilted
Find out more about Geosites
The secret of the sizes of colonnades?
The size of the colonnade depends on the Gwangseokdae Colonnade
cooling speed of the tuff. The slower it
cools, the bigger it is, the faster the smaller
it is. The cooling speed depends on the size
of the tuff and altitude.