Basalt fan structure
From Wikipedia, the free encyclopedia
Template:Short description Template:Refimprove
A basalt fan structure is a basalt formation composed of columnar jointed basalt columns that have slumped into a fan shape.[1]
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. As the basalt cools and forms columns, the ash collapses, causing the lava spread and form a fan shape. The formations can be vertical or any degree of horizontal.[citation needed]
References
Page Template:Reflist/styles.css has no content.
- ^ Page Module:Citation/CS1/styles.css has no content.Faust, George T. "Joint Systems in the Watchung Basalt Flows, New Jersey" (PDF). Geological Survey Professional Paper 864-B. United States Government Printing Office. Retrieved 17 December 2019.
