Obolon' crater is part of WikiProject Geology, an attempt at creating a standardized, informative, comprehensive and easy-to-use geology resource. If you would like to participate, you can choose to edit this article, or visit the project page for more information.
I quickly added some references because the article was considered for deletion. But didn't have time to do put them in correct wiki format, so feel free to improve them and add more. Zamphuor 02:19, 17 February 2007 (UTC)
GregU, thanks for tidying up my references, looks better now. --Zamphuor 11:20, 18 February 2007 (UTC)