Claim CD510: Folded rocks must have been soft when folded
Brief response in the Index to Creationist Claims in the TalkOrigins Archive.
Creation Science Rebuttals: Creation Magazine: 'The Truth About Plastic Deformation (folded rock layers)'
Review by Greg Neyman on the Old Earth Ministries website of a Creation magazine article about folded rock layers.
"Rock layers folded, not fractured" — or are they?
Post on the Questioning Answers in Genesis blog. (Later republished on the author's newer Age of Rocks blog.)