Mars:
Apollinaris Patera
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PIA00411 |
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A
color image of the Apollinaris Patera Region of Mars; north toward top.
The scene shows the 80-km-wide central caldera of Apollinaris, a plume of
young flows extending south down the flank of the volcano, a cliff and chaotic
terrain west of the volcano, and the surrounding younger deposits of the
Medusae Fossae Formation (north and east). |
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Image
Credit: U.S.
Geological Survey
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A
colour image of the Apollinaris Patera Region of Mars; north toward top.
The scene shows the 80-km-wide central caldera of Apollinaris, a plume of
young flows extending south down the flank of the volcano, a cliff and chaotic
terrain west of the volcano, and the surrounding younger deposits of the
Medusae Fossae Formation (north and east). A patera (Latin for shallow dish
or saucer) is a volcano of broad areal extent with little vertical relief.
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Apollinaris
Patera is an isolated volcano (about 400 km across) lying on the Martian
highlands just north of Gusev impact crater and the termination of Ma'adim
Vallis. After the main edifice was built, eruption continued on the volcano's
southern flank to form a broad ridge overlapping the original shield. Breakdown
of ice-rich materials formed chaos on its western edge. Finally the friable
materials (possible ash?) of the Medusae Fossae Fm were deposited. |
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This
image is a composite of Viking medium-resolution images in black and white
and low-resolution images in color. The image extends from latitude 12 degrees
S. to 6 degrees S. and from longitude 182 degrees to 189 degrees; Mercator
projection. |
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