 2001 Mars OdysseyTHEMIS daytime infrared image mosaic | |
| Feature type | Shield volcano |
|---|---|
| Coordinates | 18°52′N150°28′E / 18.87°N 150.47°E /18.87; 150.47[1] |
Albor Tholus is anextinct volcano in the volcanic provinceElysium onMars. It lies south of the neighbouring volcanoesElysium Mons andHecates Tholus. Albor Tholus is 4.5 kilometres[2] high and has a diameter of 160 km[2] at its base. Its largecaldera, having a diameter of 30 km and a depth of 3 km,[2] is deep compared to calderas on the Earth. The elevation of the lowest level of the caldera is the same as the base of the volcano; however, the original lower slopes of Albor Tholus may have been covered by lava flows from its larger neighbor, Elysium Mons. Evaluations by the Mars probeMars Express found that the volcanoes of the Elysium region were active over long periods.
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