Podrobnosti záznamu

    Shape of scoria cones on Mars: Insights from numerical modeling of ballistic pathways
    Brož, Petr
    Čadek, O.
    Hauber, E.
    Rossi, A. P.
Typ dokumentu
    článek v odborném periodiku
Zdrojový dokument - seriál
    Earth and Planetary Science Letters
    Roč. 406, November
    s. 14-23
    doplnit UT ISI + granty + vědní obor
    Rozsah: 10 s. : P
Předmětová kategorie
    ballistic pathway
    explosive volcanism
    scoria cone
Klíčové slovo
Abstrakt (anglicky)
   Morphological observations of scoria cones on Mars show that their cross-sectional shapes are different from those on Earth. Due to lower gravity and atmospheric pressure on Mars, particles are spread over alarger area than on Earth. Hence, erupted volumes are typically not large enough for the flank slopes to attain the angle of repose, in contrast to Earth where this is common. The distribution of ejected material forming scoria cones on Mars, therefore, is ruled mainly by ballistic distribution and not by redistribution of flank material by avalanching after the static angle of repose is reached. As a consequence, the flank slopes of the Martian scoria cones do not reach the critical angle of repose in spite of a large volume of ejected material. Therefore, the topography of scoria cones on Mars is governed mainly by ballistic distribution of ejected particles and is not influenced by redistribution of flank material by avalanching.
    AV ČR Brno, Geofyzikální ústav
Kód přispěvatele
    AV ČR, GFÚ
Zdrojový formát
Datum importu
    23. 10. 2014