29 July 2014 · Wayback
Geologic comparisons
web.archive.org/web/20140729203020/http://www.planetarylifecycle.com/geologic.html
Io: Pele’s red sulphur ring from Galileo, 1996.
Olympus Mons 624 km across, 25 km high; volume about 100 times Mauna Loa. Tharsis Montes ~4,000 km across. Tamu Massif named as Earth’s largest, nearly as big as the giant volcanoes of Mars.
Valles Marineris over 3,000 km long, as much as 600 km across, as much as 8 km deep. Grand Canyon 800 km long, 30 km across, 1.8 km deep.
Author ratios as posted: Valles Marineris length / Mariana Trench length ≈ 1.57. Mariana “dry” depth / mean ocean depth ≈ 1.57. Mars elevation range ~30 km / Earth 19.7 km ≈ 1.52.
Callisto’s Valhalla multi-ring. Mars north polar ice compared to Greenland.
Those ratios are 2014 arithmetic. They are not a law of growth. The live geologic notes stay with the volcanoes, the canyon, and the ice.