A robot submarine is revealing the hidden secrets of a massive underwater canyon off the coast of Portugal. At 5km deep, the Nazare Canyon is the same size as America's Grand Canyon...
A robot submarine is revealing the hidden secrets of a massive underwater canyon off the coast of Portugal. At 5km deep, the Nazare Canyon is the same size as America's Grand Canyon...
Pretty amazing similaritites between the underwater rift and the abovewater, er, "erosion features caused by rivers". It would make sense that rivers would follow, in addition to lowlying areas, weak spots, or rifts, in the landscape, no? The Great Rift Valley might be a similar scenario and nobody seems to ge too excited about that.
Do me a favor: If you're not color challenged, go HERE and have a look around the valleys of most of Nevada and tell me their ages based on this map's specs. FWIW, they look to me to be of recent vintage but I can't be sure because I can't do much with the colors. BTW, the valleys appear to me to be a light gray flanked by various blues, reds, purples, whatever...