Geological formations. 셀포스(Selfoss). 아이슬란드(Iceland)

Geological formations. 셀포스(Selfoss). 아이슬란드(Iceland)

Geological formations

On the riverbank of Ölfusá you will see unusual geological formations in the form of small circular pots, about 1-2 m (3-6 feet) in diameter. These are most likely traces of large bubbles of gas, which came up in the molten lava. The walls of the bubbles cooled down before the bubbles burst at the surface. They are possibly the first stages of a hornito or pseudo crater in formation. The geological formations are listed in the Icelandic Nature Conservation Register. Here, the western edge of the great Thjorsarhraun lava is the bank of Ölfusá. The lava is around 8,700 years old, and is Earth's largest lava flow since the ice age. See also an information sign about the end point of the lava, east of the village Stokkseyri, by the sea shore.

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