Central Mound (Secondary) Crater

  • P. Senthil Kumar
Living reference work entry
DOI: https://doi.org/10.1007/978-1-4614-9213-9_40-2


A secondary impact crater with a well-developed central mound present in the crater floor, usually formed by the low-velocity impact of clustered ejecta fragments from a primary impact crater. The central mound is different from the central peak in a complex crater. These craters usually occur in the forms of clusters and chains in the distal ejecta ray deposits of the primary impact craters, but sometimes these are isolated. The size of central mound secondary craters depends on the size of the parent primary craters.


A type of secondary crater.


The central mound secondary craters occur usually in the distal rays of large primary impact craters, known to occur both on the Moon and Mars. They tend to occur in the secondary crater chains and clusters. In general, most of the craters are circular, except for a few that have polygonal or irregular shapes. Rims of the central mound craters appear as prominent ridges, indicating a rapid thinning of ejecta...


Partial Collapse Crater Floor Flame Shape Regolith Layer Secondary Crater 
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  1. Kumar PS, Kumar AS, Keerthi V, Goswami JN, Krishna BG, Kumar ASK (2011) Chandrayaan-1 observation of distant secondary craters of Copernicus exhibiting central mound morphology: evidence for low velocity clustered impacts on the Moon. Planet Space Sci 59(9):870–879CrossRefGoogle Scholar
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© Springer Science+Business Media New York 2014

Authors and Affiliations

  1. 1.CSIR - National Geophysical Research InstituteHyderabadIndia