June 13th 06, 05:05 PM
http://www.esa.int/SPECIALS/Mars_Express/SEM412AATME_0.html
Ancient caldera in Apollinaris Patera
European Space Agency
Mars Express
9 June 2006
These images, taken by the High Resolution Stereo Camera (HRSC) on
board
ESA's Mars Express spacecraft, show the caldera of Apollinaris Patera,
an ancient, 5-kilometre-high volcano northwest of Gusev Crater.
[Map showing Apollinaris Patera in context]
The HRSC obtained these images during orbit 987 with a ground
resolution
of approximately 11.1 metres per pixel. The images show part of
Apollinaris Patera, a volcano lying at approximately 7.2? South and
174.6? East.
Apollinaris Patera is an ancient shield volcano located at the northern
edge of the Southern Highlands, lying to the south-east of Elysium
Planitia and to the north of Gusev Crater, which is now being explored
by NASA's Mars Rover, Spirit.
The volcano measures approximately 180 by 280 kilometres at its base
and
rises to a maximum of 5 kilometres above the surrounding terrain.
[Apollinaris Patera caldera (north to the right)]
Shield volcanos are large volcanic structures with gently sloping
flanks. The caldera of Apollinaris Patera takes the form of a large
crater approximately 80 kilometres in diameter and up to 1 kilometre
deep. Volcanic calderas are formed when a volcano explodes or when the
cone collapses.
In the true-colour image, the terrain is partly covered by thin,
diffuse, whitish-appearing clouds. In the false-colour image, the
clouds
appear as bluish-tinted areas.
[Apollinaris Patera caldera, black and white]
The western region of the colour image (top of the image, as north is
to
the right) is characterized by brighter material, which seems to be
layered and could be the result of sedimentary deposition. Distinct
layering, causing a terrace-like appearance, is also visible east of
this brighter material and in the relatively flat region located in the
northwest (top right) of the colour image.
[Apollinaris Patera caldera, 3D anaglyph]
The colour scenes have been derived from the three HRSC-colour channels
and the nadir channel. The anaglyph image was calculated from the nadir
and one stereo channel. Image resolution has been decreased for use on
the internet.
Ancient caldera in Apollinaris Patera
European Space Agency
Mars Express
9 June 2006
These images, taken by the High Resolution Stereo Camera (HRSC) on
board
ESA's Mars Express spacecraft, show the caldera of Apollinaris Patera,
an ancient, 5-kilometre-high volcano northwest of Gusev Crater.
[Map showing Apollinaris Patera in context]
The HRSC obtained these images during orbit 987 with a ground
resolution
of approximately 11.1 metres per pixel. The images show part of
Apollinaris Patera, a volcano lying at approximately 7.2? South and
174.6? East.
Apollinaris Patera is an ancient shield volcano located at the northern
edge of the Southern Highlands, lying to the south-east of Elysium
Planitia and to the north of Gusev Crater, which is now being explored
by NASA's Mars Rover, Spirit.
The volcano measures approximately 180 by 280 kilometres at its base
and
rises to a maximum of 5 kilometres above the surrounding terrain.
[Apollinaris Patera caldera (north to the right)]
Shield volcanos are large volcanic structures with gently sloping
flanks. The caldera of Apollinaris Patera takes the form of a large
crater approximately 80 kilometres in diameter and up to 1 kilometre
deep. Volcanic calderas are formed when a volcano explodes or when the
cone collapses.
In the true-colour image, the terrain is partly covered by thin,
diffuse, whitish-appearing clouds. In the false-colour image, the
clouds
appear as bluish-tinted areas.
[Apollinaris Patera caldera, black and white]
The western region of the colour image (top of the image, as north is
to
the right) is characterized by brighter material, which seems to be
layered and could be the result of sedimentary deposition. Distinct
layering, causing a terrace-like appearance, is also visible east of
this brighter material and in the relatively flat region located in the
northwest (top right) of the colour image.
[Apollinaris Patera caldera, 3D anaglyph]
The colour scenes have been derived from the three HRSC-colour channels
and the nadir channel. The anaglyph image was calculated from the nadir
and one stereo channel. Image resolution has been decreased for use on
the internet.