tag:blogger.com,1999:blog-8693614218792476252.post2638055961145043100..comments2024-03-09T08:06:26.066-08:00Comments on Looking For Detachment: Seen in the Field: Fluffy Polygonal Ground and Mudcracks (Two Generations?)Silver Foxhttp://www.blogger.com/profile/03131032620978696727noreply@blogger.comBlogger2125tag:blogger.com,1999:blog-8693614218792476252.post-9310959819672508552010-05-05T16:16:42.892-07:002010-05-05T16:16:42.892-07:00Good idea, the expanding clays - there are expandi...Good idea, the expanding clays - there are expanding clays as part of the hydrothermal alteration in the area, and one of the shales *could* contain expanding clays, though it's not know for that.<br /><br />I like "popcorn texture" as a term. I used fluffy because it reminded me somewhat of the cryptobiotic crust found in some desert areas (which looks fluffy to me).Silver Foxhttps://www.blogger.com/profile/03131032620978696727noreply@blogger.comtag:blogger.com,1999:blog-8693614218792476252.post-75280442159533811642010-05-05T09:30:53.333-07:002010-05-05T09:30:53.333-07:00Any bentonite beds around there? I would guess so-...Any bentonite beds around there? I would guess so--it looks very much like the bentonitic shale weathering surfaces that are characteristic of badland country in Alberta. See, for example http://www.flickr.com/photos/davidwhlloyd/621593427/<br /><br />You call the texture "fluffy"; up here we call it "popcorn texture".<br /><br />--HowardAnonymousnoreply@blogger.com