The Creation of the Canyon
There are two stories about the creation of Ásbyrgi. The early Norse settlers believed that Óðinn’s normally airborne eight-legged horse, Slættur (known in literature as Sleipnir), accidentally touched down on earth and left one hell of a hoof-print to prove it. The other theory, though more scientific, is also incredible. Geologists believe that the canyon was created by an enormous eruption of the Grímsvötn caldera beneath distant Vatnajökull. It released a catastrophic jökulhlaup (glacial flood), which ploughed northward down the Jökulsá á Fjöllum and gouged out the canyon in a matter of days. The river then flowed through Ásbyrgi for about 100 years before shifting eastward to its present course.