![]() ![]() It was created from data collected by ESA’s Mars Express on April 21, 2022. This color-coded topographic image shows Ius and Tithonium Chasmata, which form part of Mars’ Valles Marineris canyon structure. Topography of Ius and Tithonium Chasmata. Whilst these high-resolution images show incredible surface detail, it is only when we look at an elevation map that we realize how incredibly deep the chasmata are – up to 7 km (4 miles)! At 4809 meters (15,777 feet), the Alps’ tallest mountain Mont Blanc would be dwarfed if it was put inside Tithonium Chasma. On the left (south), is the 840 km-long (522 mile-long) Ius Chasma, and on the right (north) is the 805 km-long (500 mile-long) Tithonium Chasma. The image at the top of this article shows two trenches (or chasma) that form part of western Valles Marineris. ![]() There’s another significant difference between the two: while the Grand Canyon was created as a result of rock being worn away by the Colorado River, Valles Marineris is thought to have formed through the drifting apart of tectonic plates. The area outlined by the bold white box indicates the area imaged by the Mars Express High Resolution Stereo Camera on April 21, 2022, during orbit 23123. This image from ESA’s Mars Express shows Ius and Tithonium Chasmata, which form part of Mars’ Valles Marineris canyon structure.
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