But these patterns present a bit of a puzzle: unlike Gusev crater, where the raised rim would have allowed a deep lake to form, Meridiani Planum has no apparent edge to the north, nothing to keep water from draining away.
But these patterns present a bit of a puzzle: unlike Gusev crater, where the raised rim would have allowed a deep lake to form, Meridiani Planum has no apparent edge to the north, nothing to keep water from draining away.
不过，这些图案却带来了个小小的难题：不像古谢夫盆地具有可供深湖形成的突起边界，梅里蒂亚尼平原的北方没有明显边界，没什么可以阻止水一点点地流尽。