EUROPEAN SPACE AGENCY / DLR / FU BERLIN, G. NEUKUM / SCIENCE PHOTO LIBRARY EUROPEAN SPACE AGENCY / DLR / FU BERLIN, G. NEUKUM / SCIENCE PHOTO LIBRARY
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Martian caldera, Mars Express satellite image. This is the caldera (upper right) of the Hecates Tholus volcano on Mars. Hecates Tholus has an elevation of 5300 metres. The caldera is around 10 kilometres across and 600 metres deep. The rings of at least three caldera collapses are seen here. Surrounding the caldera are several other volcanic features and lines thought to be due to the past flow of water. Hecates Tholus is one of the Elysium volcanos. Image from the HRSC (High Resolution Stereo Camera) on ESA's Mars Express.
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