Small circular mounds of fresh soil material formed by frost action and cryoturbation
For acidic hot springs caused by geothermal activity, see Mudpot
Mud boils near Lapporten, Sweden
A frost boil, also known as mud boils, a stony earth circles, frost scars, or mud circles,[1] are small circular mounds of fresh soil material formed by frost action and cryoturbation. They are found typically found in periglacial or alpine environments where permafrost is present, and may damage roads and other man-made structures.[2] They are typically 1 to 3 metres in diameter.[3]
Frost boils are amongst the most common features of patterned ground, the pervasive process shaping the topology of soils in periglacial regions. They generally form regular patterns of polygons. Frost boils are a type of nonsorted circle, and are characterized from other circles by barren centres of mineral soil and intercircle regions filled with vegetation and peat.[4] It is named after skin boils due to similarities in their formation processes, although subsequent research has shown other methods of formation.
Frost boils have been observed on Mars, indicating the presence of periglacial processes similar to those on Earth.[5]
^Peterson, R. A.; D. A. Walker; V. E. Romanovsky; J. A. Knudson; M. K. Raynolds; W. B. Krantz (2003). A differential frost heave model: cryoturbation-vegetation interactions(PDF). Vol. 2. pp. 885–890.
^Zhang, Xiong; Presler, Wendy (December 2012). "Use of H2Ri Wicking Fabric to Prevent Frost Boils in the Dalton Highway Beaver Slide Area, Alaska". Alaska University Transportation Center.
^Van Everdingen, R. (1998). Multi-Language Glossary of Permafrost and Related Ground-Ice Terms. National Snow and Ice Data Center/World Data Center for Glaciology, Boulder, CO.{{cite book}}: CS1 maint: location missing publisher (link)
^Peterson, R. A.; Krantz, W. B. (2008-09-01). "Differential frost heave model for patterned ground formation: Corroboration with observations along a North American arctic transect". Journal of Geophysical Research: Biogeosciences. 113 (G3): G03S04. Bibcode:2008JGRG..113.3S04P. doi:10.1029/2007jg000559. ISSN 2156-2202.
^Machado, Adriane; Barata, Teresa; Ivo Alves, E.; Cunha, Pedro P. (2012-11-01). "Mars periglacial punctual features analyses". Planetary and Space Science. 72 (1): 53–61. Bibcode:2012P&SS...72...53M. doi:10.1016/j.pss.2012.09.014. hdl:10316/79950. ISSN 0032-0633.
A frostboil, also known as mud boils, a stony earth circles, frost scars, or mud circles, are small circular mounds of fresh soil material formed by...
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members used to swim and fish in the river. Mudpot Frostboils, also sometimes known as mud boils "Tully Valley Mudboils Onondaga Creek Fact Sheet" (PDF)...
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weapons in his Sword Graveyard. Cloud succeeds while Frost and Wind find Mud Buddha, now disfigured by boils as punishment from the Gods for revealing too much...
British actress. Her TV appearances include roles in Sherlock, Black Mirror, Boiling Point, Waterloo Road and as civil rights campaigner Rosa Parks in the Doctor...
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