Albor Tholus
Encyclopedia
Albor Tholus is an extinct volcano in the Elysium Planitia
area on Mars
. It lies south of the neighbouring volcanoes Elysium Mons
and Hecates Tholus
. Albor Tholus is 4.5 kilometres high and has a diameter of 160 km at its base. Its caldera
has a diameter of 30 km and is 3 km deep, it can put in a whole Mount Etna
. Compared with terrestrial volcanoes the caldera is unusually deep, the elevation of lowest level of the caldera, same as base of the volcano. Evaluations by the Mars probe Mars Express
found that the volcanoes of the Elysium region were active over long periods.
Elysium Planitia
Elysium Planitia is the second largest volcanic region on Mars, after Tharsis Montes. It is centered at . It includes volcanoes, from north to south, Hecates Tholus, Elysium Mons and Albor Tholus. Another large volcano, Apollinaris Mons, lies south of the others. Besides having large volcanoes,...
area on Mars
Mars
Mars is the fourth planet from the Sun in the Solar System. The planet is named after the Roman god of war, Mars. It is often described as the "Red Planet", as the iron oxide prevalent on its surface gives it a reddish appearance...
. It lies south of the neighbouring volcanoes Elysium Mons
Elysium Mons
Elysium Mons is a volcano on Mars located in the Elysium Planitia, at , in the Martian eastern hemisphere. It stands about 13.9 km above the surrounding lava plains, and about 16 km above the Martian datum. Its diameter is about 240 km, with a summit caldera about 14 km across...
and Hecates Tholus
Hecates Tholus
Hecates Tholus is a Martian volcano, notable for results from the European Space Agency's Mars Express mission which indicate a major eruption took place 350 million years ago. The eruption created a caldera 10 km in diameter. It has been suggested that glacial deposits later partly filled the...
. Albor Tholus is 4.5 kilometres high and has a diameter of 160 km at its base. Its caldera
Caldera
A caldera is a cauldron-like volcanic feature usually formed by the collapse of land following a volcanic eruption, such as the one at Yellowstone National Park in the US. They are sometimes confused with volcanic craters...
has a diameter of 30 km and is 3 km deep, it can put in a whole Mount Etna
Mount Etna
Mount Etna is an active stratovolcano on the east coast of Sicily, close to Messina and Catania. It is the tallest active volcano in Europe, currently standing high, though this varies with summit eruptions; the mountain is 21 m higher than it was in 1981.. It is the highest mountain in...
. Compared with terrestrial volcanoes the caldera is unusually deep, the elevation of lowest level of the caldera, same as base of the volcano. Evaluations by the Mars probe Mars Express
Mars Express
Mars Express is a space exploration mission being conducted by the European Space Agency . The Mars Express mission is exploring the planet Mars, and is the first planetary mission attempted by the agency. "Express" originally referred to the speed and efficiency with which the spacecraft was...
found that the volcanoes of the Elysium region were active over long periods.