The Tharsis Montes are three large shield volcanoes in the Tharsis region of the planet Mars. From north to south, the volcanoes are Ascraeus Mons, Pavonis Mons and Arsia Mons. Mons is the Latin word
Arsia Mons, southernmost peak of Tharsis Montes.
Pavonis Mons, the central peak of Tharsis Montes.
The caldera of Ascraeus Mons, northernmost peak of Tharsis Montes.
Olympus Mons is a large shield volcano on Mars. As measured by the Mars Orbiter Laser Altimeter, it is 21.287 kilometres high, about 2.5 times the elevation of Mount Everest above sea level. It is Mar
Tharsis Montes
…or Tharsis bulge. The Tharsis region is thousands of kilometers across and averages nearly 10 km (33,000 ft) above the mean elevation of the planet. Olympus Mons, the tallest known mountain in the Solar System, is located about 1,200 km (750 mi) northwest of the Tharsis Montes, at the edge of the Tharsis region…
Mars Global Surveyor image showing lava flows of different ages at the base of Olympus Mons. The flat plain is the younger flow. The older flow has lava channels with levees along the edges. Levees are quite common to lava flows on Mars.
Lava flows on Olympus Mons with older and younger flows labeled, as viewed by HiRISE during the HiWish program
Calderas on the summit of Olympus Mons. The youngest calderas form circular collapse craters. Older calderas appear as semicircular segments because they are transected by the younger calderas.
Oblique view of Olympus Mons, from a Viking image mosaic overlain on MOLA altimetry data, showing the volcano's asymmetry. The view is from the NNE; vertical exaggeration is 10×. The wider, gently sloping northern flank is to the right. The more narrow and steeply sloping southern flank (left) has low, rounded terraces, features interpreted as thrust faults. The volcano's basal escarpment is prominent.