Tag Archives: olivine

Dikes: key link between Thaumasia Planum, Tharsis, and Valles Marineris?

The area called Syria-Thaumasia is a big triangular block of Mars just east of three giant Tharsis volcanos: Arsia, Pavonis, and Ascraeus Montes. Valles Marineris bounds the block on the north, while its southwest and southeast sides are defined by … Continue reading

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Changing times in Syrtis Major

Early Mars appears to have been highly unlike today, being warmer and wetter. To find out why and how the environment changed, scientists look for inflection points in Martian history, where one geological regime gives way to another. A report … Continue reading

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Microbes in a cave, eating rock

Life abounds on Earth, where it lives in every possible ecological niche, including deep in the crust. This comes from biology’s reproductive drive plus natural selection’s creativity in matching organisms’ needs with what nature provides. But what about Mars, where … Continue reading

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Cracks in the basement

When geological forces open a crack in bedrock, molten magma can squeeze in and widen it, after which the magma cools and hardens in place. The result is a dike, and such features let geologists delve into an outcrop’s history … Continue reading

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