A lava coil is a spiral or scroll-shaped lava formation occurring when relatively low viscosity lava such as Pahoehoe solidifies along a slow-moving shear zone in the flow. The shear produces a Kelvin–Helmholtz instability that forms spiral-shaped patterns. Depending on the side of the flow the spiral is clockwise or anti-clockwise. They have been observed on flows near Kilauea on Hawai'i,[1] in Kenya[2] and possibly on Mars.[3]
Lava Coils on Earth and Mars
Surface of December 31, 1974 pahoehoe northeast of Pu‘u Koa ́e, Hawaii. Lava coil is 10 m diameter.
Spirals interpreted to be lava coils[3] on the surface of a Martian lava lake in Cerberus Palus. Field of view is about 500 m.
^Dallas Peck, Lava coils of some recent historic flows, Hawaii. Geological Survey Research, B148-B151 1966
^Temperley BN (1966) Vortex exudation coils on a recent basaltic lava in Kenya. Overseas Geol Mineral. Resour. 10:42-46
^ abRyan, A. J.; Christensen, P. R. (26 April 2012). "Coils and Polygonal Crust in the Athabasca Valles Region, Mars, as Evidence for a Volcanic History". Science. 336 (6080): 449–452. Bibcode:2012Sci...336..449R. doi:10.1126/science.1219437. PMID 22539716. S2CID 39352082.
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honesty, Shere Khan threatens Kaa into showing his middle by loosening his coils, inadvertently allowing Mowgli to escape after which the tiger resumes his...
Coil – a supervillain created by the Master that once kidnapped Detective Greg King. He has the ability to extend and compress his body like a coil spring...
version to Rosenzweig's popular vintage reproduction bulbs (modern tungsten coils are already more efficient). These bulbs maintain the same "exposed" look...
tabulate corals, and crinoids are all abundant in the oceans. First fully coiled cephalopods (Ammonoidea and Nautilida, independently) with the former group...
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Global Information
Surface of December 31, 1974 pahoehoe northeast of Pu‘u Koa ́e, Hawaii. Lava coil is 10 m diameter.![Spirals interpreted to be lava coils[3] on the surface of a Martian lava lake in Cerberus Palus. Field of view is about 500 m.](//upload.wikimedia.org/wikipedia/commons/thumb/2/21/Weird-Lava-flows-on-Mars.jpg/285px-Weird-Lava-flows-on-Mars.jpg)
Spirals interpreted to be lava coils[3] on the surface of a Martian lava lake in Cerberus Palus. Field of view is about 500 m.
![Spirals interpreted to be lava coils[3] on the surface of a Martian lava lake in Cerberus Palus. Field of view is about 500 m.](http://upload.wikimedia.org/wikipedia/commons/thumb/2/21/Weird-Lava-flows-on-Mars.jpg/285px-Weird-Lava-flows-on-Mars.jpg)