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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 …
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Trucks navigate steep Mt. Elgon mountain roads full with passengers and agricultural produce in Bulambuli Dist., Uganda, Africa Stock Photo - Alamy
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Mountain Beltway - AGU Blogosphere
Mountain Beltway - AGU Blogosphere
