Phil Christensen
Latest articles by Phil Christensen
![Holden crater's wide floor, shown in a newly released image, has abundant layered sediments, channels, and large piles of debris at canyon mouths. These suggest a long history of deposits by water.](https://cdn.mos.cms.futurecdn.net/9XSfS84YLWCkn3DMWaDhH5-320-80.jpg)
Exploring Mars: A Crater Where Water Ran
By Robert Burnham, Phil Christensen published
Holden's wide floor has abundant layered sediments, channels, and large piles of debris at canyon mouths. These suggest a long history of deposits by water.
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