Geology of Mars of the dichotomy places a significant constraint on theories of its origin. Straddling the dichotomy boundary in Mars's western hemisphere is a massive volcano-tectonic province known as the Tharsis region or the Tharsis bulge. This immense, elevated structure is thousands of kilometers in diameter and covers up to 25% of the planet’s surface. Averaging 7–10 km above datum (Martian "sea" level), Tharsis contains the highest elevations on the planet and the largest known volcanoes in the Solar System. Three enormous volcanoes, Ascraeus Mons, Pavonis Mons, and Arsia Mons (collectively known as the Tharsis Montes), sit aligned NE-SW along the crest
Mount Olympus (Tasmania) Mount Olympus (Tasmania) Mount Olympus is a mountain in the Cradle Mountain-Lake St Clair National Park in Tasmania, Australia. It is the 24th highest mountain in Tasmania at above sea level and is situated about South-East of Mount Gould and about west of Lake St. Clair. In 1835 George Frankland climbed the mountain and named it Mount Olympus. Mount Olympus was painted by the Australian landscape painter, William Charles Piguenit. It was purchased by the Art Gallery of New South Wales in 1875 and was the Gallery's first oil painting acquisition, "the first Australian work purchased by public subscription", and