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The Red Planet's upper crust is brittle and weak. Planetary geologists often attribute this to effusive eruption -- lava pouring out of a volcano onto the ground -- early in Mars's history with later modifications. However, some have suggested that the friable materials were created by widespread ash-laden explosive volcanoes that were eroded by geologic processes over the course of Martian history.![](//feeds.feedburner.com/~r/sciencedaily/space_time/space_exploration/~4/_4gz0lTwz34)
via Science Daily
Zazzle Space Exploration market place
The Red Planet's upper crust is brittle and weak. Planetary geologists often attribute this to effusive eruption -- lava pouring out of a volcano onto the ground -- early in Mars's history with later modifications. However, some have suggested that the friable materials were created by widespread ash-laden explosive volcanoes that were eroded by geologic processes over the course of Martian history.
via Science Daily
Zazzle Space Exploration market place
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