The following is an archived discussion of the DYK nomination of the article below. Please do not modify this page. Subsequent comments should be made on the appropriate discussion page (such as this nomination's talk page, the article's talk page or Wikipedia talk:Did you know), unless there is consensus to re-open the discussion at this page. No further edits should be made to this page.

The result was: promoted by Miyagawa (talk) 19:53, 16 May 2015 (UTC)

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Secondary crater[edit]

• ... that secondary craters (pictured) can sometimes form radial crater chains?

• ALT1:... that secondary crater formation requires a primary crater, sufficient gravity, and enough velocity in the ejected material?
• Reviewed: Cyril Stanley Smith
• Comment: Education Program:Louisiana State University/Geology 4002: Evolution of Terrestrial Planets (Spring 2015)

5x expanded by Mangolava (talk). Nominated by Graeme Bartlett (talk) at 03:30, 2 April 2015 (UTC).

• This generally looks very good, clear and interesting. There are some paragraphs for which a source should be provided. In "Formation", last paragraph, should it not read "thicker" rather than "thinner"? Aymatth2 (talk) 02:19, 15 May 2015 (UTC)

• I have added some more citations, and removed that thinner bit. Graeme Bartlett (talk) 23:18, 15 May 2015 (UTC)

• That fixes it. New enough, long enough, neutral, no close paraphrasing issues. Both hooks are supported and short enough. I prefer the first. Aymatth2 (talk) 23:31, 15 May 2015 (UTC)