Path on Mars of NASA's Curiosity rover toward Glenelg and the discovery of what appears to be an ancient martian streambed.
Goulburn offered the first hint that water might have transported the sandstone material making up the outcrop. The exposed rock outcrop named Link piqued interest because the rounded shapes offered evidence of water transport. The other exposed rock outcrop, named Hottah, contains many rounded pebbles. That offered more evidence of water as the rounded pebbles, which are up to 1.6 inches large, are thought to be too big to have been transported by wind, according to NASA.