Weird surface cracking in the Martian northern lowland plains
Cool image time! The picture to the right, cropped, reduced, and enhanced to post here, was taken on January 15, 2023 by the high resolution camera on Mars Reconnaissance Orbiter (MRO). The picture was simply labeled “Channel-like feature”, which hardly describes this strange terrain.
Apparently a mantle of surface material has covered and filled an ancient east-west channel. That surface material however has since cracked along the edges of that channel as well along its length. The cracks suggest that the material in the channel is moving downhill slowly, cracking along the cliff walls while also being pulled apart to form the north-south cracks.
My regular readers will I think be able to guess what is going on here, but if you can’t, the overview map below will help explain this.
The white dot in Utopia Planitia indicates the location of this picture. It also suggests that the downhill grade is to the east, into Utopia.
The latitude, 45 degrees north, places this feature far enough north for there to be ample near surface ice, which also suggests that the surface mantle that is cracking likely has a lot of ice within it, and that the cracks indicate the presence of a buried glacier inside this channel.
This hypothesis however is hardly certain, since in looking at a lot of images of the northern lowland plains from MRO I have never seen anything quite like this. The north-south cracks are not uncommon, but I do not remember ever seeing previously anything similar to the east-west cracks delineating what appears to be a buried channel.
On Christmas Eve 1968 three Americans became the first humans to visit another world. What they did to celebrate was unexpected and profound, and will be remembered throughout all human history. Genesis: the Story of Apollo 8, Robert Zimmerman's classic history of humanity's first journey to another world, tells that story, and it is now available as both an ebook and an audiobook, both with a foreword by Valerie Anders and a new introduction by Robert Zimmerman.
The ebook is available everywhere for $5.99 (before discount) at amazon, or direct from my ebook publisher, ebookit. If you buy it from ebookit you don't support the big tech companies and the author gets a bigger cut much sooner.
The audiobook is also available at all these vendors, and is also free with a 30-day trial membership to Audible.
"Not simply about one mission, [Genesis] is also the history of America's quest for the moon... Zimmerman has done a masterful job of tying disparate events together into a solid account of one of America's greatest human triumphs."--San Antonio Express-News
Cool image time! The picture to the right, cropped, reduced, and enhanced to post here, was taken on January 15, 2023 by the high resolution camera on Mars Reconnaissance Orbiter (MRO). The picture was simply labeled “Channel-like feature”, which hardly describes this strange terrain.
Apparently a mantle of surface material has covered and filled an ancient east-west channel. That surface material however has since cracked along the edges of that channel as well along its length. The cracks suggest that the material in the channel is moving downhill slowly, cracking along the cliff walls while also being pulled apart to form the north-south cracks.
My regular readers will I think be able to guess what is going on here, but if you can’t, the overview map below will help explain this.
The white dot in Utopia Planitia indicates the location of this picture. It also suggests that the downhill grade is to the east, into Utopia.
The latitude, 45 degrees north, places this feature far enough north for there to be ample near surface ice, which also suggests that the surface mantle that is cracking likely has a lot of ice within it, and that the cracks indicate the presence of a buried glacier inside this channel.
This hypothesis however is hardly certain, since in looking at a lot of images of the northern lowland plains from MRO I have never seen anything quite like this. The north-south cracks are not uncommon, but I do not remember ever seeing previously anything similar to the east-west cracks delineating what appears to be a buried channel.
On Christmas Eve 1968 three Americans became the first humans to visit another world. What they did to celebrate was unexpected and profound, and will be remembered throughout all human history. Genesis: the Story of Apollo 8, Robert Zimmerman's classic history of humanity's first journey to another world, tells that story, and it is now available as both an ebook and an audiobook, both with a foreword by Valerie Anders and a new introduction by Robert Zimmerman.
The ebook is available everywhere for $5.99 (before discount) at amazon, or direct from my ebook publisher, ebookit. If you buy it from ebookit you don't support the big tech companies and the author gets a bigger cut much sooner.
The audiobook is also available at all these vendors, and is also free with a 30-day trial membership to Audible.
"Not simply about one mission, [Genesis] is also the history of America's quest for the moon... Zimmerman has done a masterful job of tying disparate events together into a solid account of one of America's greatest human triumphs."--San Antonio Express-News
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