Hecates Tholus
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Hecates Tholus is a Martian volcano, notable for results from the European Space Agency's Mars Express mission which indicate a major eruption took place 350 million years ago. The eruption created a
2001 Mars Odyssey THEMIS daytime infrared image mosaic
Hecates Tholus ridges, as seen by HiRISE. Ridges are to the west-northwest of Hecates Tholus. It has been proposed that this region was affected by a volcanic eruption that occurred under a 200 meter-thick ice sheet.
Elysium (volcanic province)
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Elysium, located in the Elysium and Cebrenia quadrangles, is the second largest volcanic region on Mars, after Tharsis. The region includes the volcanoes Hecates Tholus, Elysium Mons and Albor Tholus.
Hecates Tholus
…The eruption created a caldera 10 km in diameter on the volcano's western flank. The volcano is at location 32.12°N 150.24°E, in the volcanic province Elysium, and has a diameter of 182 km. It is the northernmost of the Elysium volcanoes; the others are Elysium Mons and Albor Tholus. Hecates Tholus is in the…
High-resolution THEMIS daytime infrared image mosaic of Elysium from 2001 Mars Odyssey.
Albor Tholus, as seen by THEMIS.
Troughs to the east of Albor Tholus, as seen by HiRISE under the HiWish program