Daljeonri Columnar Joints in Daljeon-ri, Pohang-si, South Korea.
Daljeonri Columnar Joints is an unusual bunch of columnar joints that developed inland with impressive, well-defined stone pillars. It was discovered by chance while used for a quarry and have been designated a natural monument No. 415.
Columnar joints refer to a distinct rocky feature that forms when lava cods down and contracts quickly in contact with air or water leaving hexagonal or pentagonal cracks. The columns stand vertical to the sides of heat lose, namely, upward to the air and downward to the ground. Lava better joints when the heat finds clear direction to go away.
As a result, the upper and lower section of lava flows either near the air or the ground make a more regular pattern, respectively termed as an upper colonnade and a lower colonnade. The middle section where the two colonnades meet, however, has less obvious directions of heat loss and forms a more chaotic pattern, called am entablature.
Comments
Post a Comment