Definition
A linear crater chain is a regularly spaced row of three or more impact craters (for two craters doublet crater) with similar sizes and apparently identical ages, formed by the impact of tidally disrupted bodies.
Description
Linear crater chains consist of strings of closely spaced roughly similar-sized aligned craters.
Subtypes
(1) Linear; (2) Doublet crater, if a “row” consists of two craters.
Formation
They likely originate from weak rubble pile asteroids or comets (fragile aggregates of large and small components held together by self-gravity or surface forces rather than material strength) tidally pulled apart during a close approach to a planet, separating into a train of fragments which then impacted a moon rather than escaping to interplanetary space.
Since there are no asteroids in the outer solar system, only comets can be the source of crater chains on giant planet...
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References
Bottke WF Jr, Richardson DC, Love SG (1997) Can tidal disruption of asteroids make crater chains on the Earth and Moon? Icarus 126:470–474
Melosh HJ, Schenk P (1993) Split comets and the origin of crater chains on Ganymede and Callisto. Nature 365:731–733
Melosh HJ, Whitaker EA (1994) Lunar crater chains. Nature 369:713
Passey QR, Shoemaker EM (1982) Craters and basins on Ganymede and Callisto: morphological indicators of crustal evolution. In: Morrison D (ed) Satellites of Jupiter. University Arizona Press, Tucson, pp 379–432
Schenk PM (n.d.) Catena on Ganymede. http://www.lpi.usra.edu/science/schenk/chain.html
Schenk PM, Asphaug E, McKinnon WB, Melosh HJ, Weissman PR (1996) Cometary nuclei and tidal disruption: the geologic record of crater chains on Callisto and Ganymede. Icarus 121:249–274
Sekiguchi N (1970) On the fissions of a solid body under influence of tidal force; with application to the problem of twin craters on the moon. Moon 1:429–439
Wichman RW, Wood CA (1995) The davy crater chain: implications for tidal disruption in the Earth-Moon System and elsewhere. Geophys Res Lett 22(5):583–586. doi:10.1029/94GL02966
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© 2014 Her Majesty the Queen in Right of Australia, as represented by Trudi Hoogenboom
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Richardson, D.C., Hagen, T.H. (2014). Crater Chain (Impact, Primary). In: Encyclopedia of Planetary Landforms. Springer, New York, NY. https://doi.org/10.1007/978-1-4614-9213-9_73-2
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DOI: https://doi.org/10.1007/978-1-4614-9213-9_73-2
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