‘Knobby terrain’ a sign of Mars’s explosive past

27 enero 2015

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.