Floods At Mars' Equator Appear To Be "Recent"
Not only lava, but water has recently flooded from fissures near Mars' equator, University of Arizona scientists have discovered. And they're not talking about a trickle. They're talking possibly 600 cubic kilometers of water. That's one and a quarter times as much water as in Lake Erie, four times as much water as in Lake Tahoe, and 65 times as much water as in California's Salton Sea.
http://www.spacedaily.com/news/mars-water-science-02a.html