Wiki Education Foundation-supported course assignment edit

  This article was the subject of a Wiki Education Foundation-supported course assignment, between 15 January 2020 and 7 May 2020. Further details are available on the course page. Student editor(s): Torrin Smith. Peer reviewers: Schilling.A.Taylor, Tigitar, Paigelpowers.

Above undated message substituted from Template:Dashboard.wikiedu.org assignment by PrimeBOT (talk) 10:40, 18 January 2022 (UTC)Reply

Proposed edits to the page; we removed extraneous details about clay minerals, provided better explanations about formation, and included improved citations. User:GeoSulli/sandbox --GeoSulli (talk) 20:18, 17 November 2022 (UTC)Reply