Tag Archives: pyroclastic eruptions

Everything you wanted to know about Martian scoria cones, but were afraid to ask…

Planetary Geomorphology Image of the Month, January 30, 2017: Petr Brož (Institute of Geophysics, Czech Academy of Science). Volcanism is an important process which shapes the surfaces of all terrestrial planets, and is still active on Earth, Jupiter’s moon Io, … Continue reading

Posted in Reports | Tagged , , , | Comments Off

Does Arabia show a new style of Martian volcanism?

Arabia is one of the largest and oldest regions of Mars. Among its varied rocks are widespread deposits of soft and easily eroded ones which may have a volcanic origin. However, Arabia has no obvious volcanic vents or sources.

Posted in Reports | Tagged , , , , , , , , , , , | Comments Off

Explosive eruptions in dense ancient atmospheres

Explosive volcanic eruptions on an earlier Mars with a thicker atmosphere would have scattered fine ash (pyroclastic debris) mainly east or west of the volcano, a new study finds. Also, a denser ancient atmosphere supports the addition of Arsia and … Continue reading

Posted in Reports | Tagged , , , , , , , | Comments Off

Did Tharsis change its volcanic style?

Volcanic activity on Mars tends toward an “effusive” eruption style: it produces many low-profile, broad-skirted volcanos. These are made with sheets of runny lavas that flow like warm motor oil for long distances, spilling over and around obstacles or burying … Continue reading

Posted in Reports | Tagged , , , , | Comments Off