A basalt fan structure is a basalt formation composed of columnar jointed basalt columns that have slumped into a fan shape. Such formations are most likely created when basalt lava is intruded into a soft material, such as loose volcanic ash, which is unable to support the intrusion.
A basalt fan structure is a basalt formation composed of columnar jointed basalt columns that have slumped into a fan shape. Such formations are most likely created when basalt lava is intruded into a soft material, such as loose volcanic ash, which is unable to support the intrusion.
Source: Wikipedia "Basalt fan structure" · CC BY-SA 4.0
Share this article: X · Bluesky