Gigantic blocks of rock litter the crater floor.

陨石坑底部到处是巨大石块。

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What caused this unusual looking crater floor on Mars?

火星这个奇特的陨石坑底到底是怎麽形成的？

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Another sign of ice is the presence of parallel lines and pitted material on the crater floor.

另外一个有冰存在的迹象就是陨石坑底部的并行线和无核物质。

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The crater floor is made of relatively new volcanic rock, formed by lava flows that would have covered any evidence of ancient bodies of water.

CNN: Mars rovers working overtime

Scientists believe magma is now at a very shallow level and hot cracks in the dome are opening which is causing rockfalls on to the south crater floor.

BBC: Mount St Helens spews out steam and ash on 5 October 2004

The vehicle is currently sitting in a small depression on the floor of Gale Crater known as Yellowknife Bay.

BBC: Curiosity Mars rover to investigate classic rock type