After the Last Glacial Maximum in North America, a kilometer-thick ice dam at the toe of a glacier failed, allowing the waters of massive Lake Missoula to rush out and inundate the landscape of what is now eastern Washington. The flooding carved out the scarred and pockmarked landscape of the Channeled Scablands, which cover about 30,000 square kilometers of the northwestern United States. Noted first by Indigenous flood stories and then by geomorphologists in the 1800s, the possibility of massive floods here has long been intriguing; more recently, researchers have turned to the Scablands for insights into Martian flooding, too. But geologists still don’t know quite how big the Scablands floods were.
Click here for original story, Western US ‘megafloods’ during last ice age might not have been so mega
Source: Phys.org