A huge marican lava tube, about 50 meters in diameter, has been identified in images sent by the camera HiRISE high resolution on board Mars Reconnaissance Orbiter (MRO) from NASA.
Some types of lava can be squeezed out from under the older rock and lifted it up so it can continue to flow underground. In this way they can be formed large underground rivers of lava and when the volcano stops erupting, lava can come out of these underground tubes.
These Empty underground tubes are common on Earth and can cut through the giant volcanoes of Mars as in this place on the flanks of Arsia Mons, reports the HiRISE team website.
In this picture, the roof of the lava tube collapsedin one place and made this crater. He The well is about 50 meters wide, so it is likely that the underground tube is also at least this large (much larger than similar caves on Earth).
HiRISE He was unable to see the inside of the well because the interior was shaded at the time of passage.
Arsia Mons is the southernmost of the three volcanoes that make up the community known as Tharsis Montes, near the equator of the planet Mars. It measures 430 kilometers in diameter, and rises 16 kilometers above the Martian surface plane (more than 9 kilometers above its surrounding plains). The caldera at its summit is more than 115 km wide.
HiClip mini 4K: The Shapes of Things on Martian Lands
Accompanies our 4K image post. The enhanced color image is less than 1 km top to bottom, and north is to the right.
– HiRISE: Beautiful Mars (NASA) (@HiRISE) October 14, 2020