From Exodus3000 Wiki

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 2.8 mile (4.5 Km) high and has a diameter of 99 miles (160 Km) at its base. Its caldera has a diameter of 18.6 miles (30 Km) and is 1.9 miles (3 Km) deep. This is geologically interesting, since the depth of the caldera approaches the height of the volcano, which is unusual on Earth.

Evaluations by Mars Express found that the volcanoes of the Elysium region were active over long periods.

Albor Tholus viewed on Google Mars

Exodus3000
Statistics	Weapons | Defense | Intelligence | Security | Radar
In-game Elements	Dig | Cards | Missions
In-game Locations	Mars | Homestead | Abandoned Homesteads | Settlements | Outposts | Volcanoes | Ruins | Craters | Plains | Dunes
Rules and Regulations	Alliances | Basics | Cheating | Payouts | Purchases | Special Prizes | Referrals | Cards | Dig for Treasure
Official Website	Official site