Today, the Friday fold is a fake! Looks like a nice set of asymmetric antiforms and synforms, right? But it ain’t! It’s naturally wiggly; primary not tectonic. The photo shows nothing more than differential erosion of hematite that was deposited by groundwater in permeable sandstone. It’s Liesegang banding! These hematite blobs are in the sandstone at Giant City State Park, south of Carbondale, Illinois. Several are cylindrical in form, presumably …
The Great Adventure - Gunther Holtorf's Epic 26-Year Journey
MBL - Tour WF - EU, Alex Buisse
Estimating uncertainties in 3-D models of complex fold-and-thrust
Baosbheinn Steven Fallon
Fay Manners and Tom Lafaille ski big new line on Aiguille d'Argentiere
Mountain Crossings at Walasi-yi
Mount Siguniang Massif Mountaineering Information
Liesegang rings (geology) - Wikipedia
Mountain Beltway - AGU Blogosphere
Mountain Beltway - AGU Blogosphere
Ajanta Neog on X: The much anticipated Furkating Railway
Mountain Beltway - AGU Blogosphere
Godfrey Wenness breaks paragliding world record
The Great Adventure - Gunther Holtorf's Epic 26-Year Journey Across 215 Countries — HER 86m2 - by Thuy Dao
Photos & News: Special trip photos - Zhangye Danxia Landform