File:Athabasca lava flows and boil, Mars.jpg

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English: What is this enigmatic landform?

The circular feature is nearly 2 kilometers (1.2 miles) wide. It looks like a circular island surrounded by a "sea" of smooth-looking lava flows. The Athabasca region contains some of the youngest lava flows on Mars. Therefore, it is highly possible that volcanism played a role in creating this feature.

Perhaps lava has intruded underneath this mound and pushed it up from beneath. It looks as if material is missing from the mound, so it is also possible that there was a significant amount of ice in the mound that was driven out by the heat of the lava. There are an array of features like this in the region that continue to puzzle scientists.

We hope that close inspection of this HiRISE image, and others around it, will provide some clues regarding its formation.

Date

3 December 2014 publication

Source

http://photojournal.jpl.nasa.gov/catalog/PIA18932

Author

NASA UA HiRISE program

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	Warnings: Use of NASA logos, insignia and emblems is restricted per U.S. law 14 CFR 1221. The NASA website hosts a large number of images from the Soviet/Russian space agency, and other non-American space agencies. These are not necessarily in the public domain. Materials based on Hubble Space Telescope data may be copyrighted if they are not explicitly produced by the STScI.[1] See also {{PD-Hubble}} and {{Cc-Hubble}}. The SOHO (ESA & NASA) joint project implies that all materials created by its probe are copyrighted and require permission for commercial non-educational use. [2] Images featured on the Astronomy Picture of the Day (APOD) web site may be copyrighted. [3] The National Space Science Data Center (NSSDC) site has been known to host copyrighted content. Its photo gallery FAQ states that all of the images in the photo gallery are in the public domain "Unless otherwise noted."

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	06:07, 17 September 2016		1,224 × 656 (465 KB)	Tillman (talk \| contribs)	{{Information \|Description ={{en\|1=What is this enigmatic landform? The circular feature is nearly 2 kilometers (1.2 miles) wide. It looks like a circular island surrounded by a "sea" of smooth-looking lava flows. The Athabasca region contains some...

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File:Athabasca lava flows and boil, Mars.jpg

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