Did MARS once have OCEANS? Curiosity discovers continental crust
NASA's nuclear-powered Curiosity rover has aimed its ChemCam laser at some unusually light-coloured rocks on Mars and discovered surprising similarities between them and the rocks of Earth's granitic continental crust.
The evidence of a "continental crust" on Mars is a huge discovery from the space-tank, now rumbling over the red planet's cotta surface with an unbroken arm .... http://www.theregister.co.uk