Since the 1970s, planetary geologists have known that volcanic features cover large swaths of Mars. Early Mariner 9 images ...
PRIMETIMER on MSN
Why do volcanic cones appear on both Earth and Mars? The scoria cone mystery explored
Scientists compare volcanic cones on Earth and Mars to explain how gas-rich magma forms scoria cones. Spacecraft observations and Earth analog sites provide evidence of similar eruptive processes.
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