Odori Columnar Joint, Pohang

Basic information

Designation

Natural Monument No.575

Category

자연지형

Era

신생대

Designated year

2023

Location

포항시, 경상북도— 경상북도 포항시 북구 흥해읍 오도리 산 91 일원

Coordinates

36.154712, 129.403727Kakao address conversion

This English description was machine-translated and may contain inaccuracies. Refer to the original Korean text for details.

The Pohang Odori Columnar Jointing is distributed on a small scale within the Tertiary Yeonil Formation Group of the Cenozoic Era. The Daljeong Basalt intruding the Yeonil Formation Group in Pohang was measured at approximately 14 million years old using the Ar-Ar dating method, and the Odori Columnar Jointing is presumed to have formed during a similar period. The entire island displays a northwest-southeast trending elongated oval shape. The eastern section displays well-preserved polygonal shapes on flat surfaces, while the western section shows overlapping hexagonal columns standing at horizontal or low angles. The Odori Columnar Jointing demonstrates the process of various columnar jointing forms created through marine erosion, possessing scenic and academic value.

Location