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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 …
Mountain Crossings at Walasi-yi
Estimating uncertainties in 3-D models of complex fold-and-thrust
Mountain Beltway - AGU Blogosphere
Zhangye National Geopark - Atlas Obscura
The Great Adventure - Gunther Holtorf's Epic 26-Year Journey Across 215 Countries — HER 86m2 - by Thuy Dao
Zigzag roads hi-res stock photography and images - Alamy
The Great Adventure - Gunther Holtorf's Epic 26-Year Journey Across 215 Countries — HER 86m2 - by Thuy Dao
Mountain Beltway - AGU Blogosphere
SOS AFRICA SHEPTON MALLET PRISON CHARITY ABSEIL
SOS AFRICA SHEPTON MALLET PRISON CHARITY ABSEIL
Yellow Grass Plateau and Seven Towers
Mountain Beltway - AGU Blogosphere