The HRSC image runs from northwest to the southeast across the Tharsis region from the polar ice cap in the lower-left corner of the image, over the giant volcano Alba Mons, part of Olympus Mons, the Tharsis volcanoes Ascraeus Mons
and Pavonis Mons shown as dark patches above the cloud cover and finally across the net-like Noctis Labyrinthus and the valley system of Valles Marineris, with its characteristic dark-coloured deposits in the top left-hand corner of the image.
The southernmost member of this group of shield volcanoes is called Arsia Mons (the other two being Ascraeus Mons
and Pavonis Mons).
That would make Mars's giant mid-latitude mountains -- Ascraeus Mons
, Pavonis Mons and Arsia Mons.
The High Resolution Imaging Science Experiment camera aboard NASA's Mars Reconnaissance Orbiter found the heart-shape on the south of the huge shield volcano Ascraeus Mons
which measures approximately 200 meters across, Discovery News reported.
Morning clouds and frost can sometimes settle in the broad, low plains of this region, making the giant Tharsis volcanoes Arsia Mons, Pavonis Mons, and Ascraeus Mons
, as well as nearby Olympus Mons, appear as dark spots above the bright plains.
Here we report on specific white clouds forming in the afternoon over Alba Patera, Olympus Mons (aka Nix Olympica), the Tharsis Montes (Ascraeus Mons
, Pavonis Mons and Arsia Mons) and Elysium Mons.
"Combined with the varying height of the volcanoes, we can say that Arsia Mons is the oldest, then Pavonis Mons formed and finally Ascraeus Mons
," said Mikael Beuthe of the Royal Observatory of Belgium and lead author of the paper.
Here we report on specific white clouds over Alba Patera, Olympus Mons ('Nix Olympica'), the Tharsis Montes (Ascraeus Mons
, Pavonis Mons and Arsia Mons) and Elysium Mons (Figures 14-16; and Part I, Figures 4F, 5).
In mid-November 2009, during early northern spring, observers detected bright clouds over the four great volcanoes of the Tharsis Bulge: Olympus Mons, Ascraeus Mons
, Pavonis Mons, and Arsia Mons.
of Ascraeus Mons
), Chryse-Xanthe, Isidis Regio-Libya, Tempe, W.
The 270-km long Martian channel near the Ascraeus Mons
volcano does not seem to have been made by water.
Bleacher and his colleagues carried out a careful study of a single channel on the southwest flank of Mars' Ascraeus Mons
volcano, one of the three clustered volcanoes collectively called the Tharsis Montes.