Layered glaciers in Mars’ glacier country
Cool image time. The photo to the right, cropped and reduced to post here, was taken on August 30, 2021 by the high resolution camera on Mars Reconnaissance Orbiter (MRO). It shows two different impact craters in a glacial region dubbed Nilosyrtis Mensae, located in the northern mid-latitudes in the 2,000 mile long strip chaos terrain that I have labeled glacier country because practically every image finds them there.
The splash apron surrounding the larger crater is typical of craters in Martian regions where ice is thought to be near the surface.
What makes this picture interesting is that the glaciers appear layered. You can see evidence of this in the mounds inside both craters. Those mounds appear to represent earlier periods when there was more ice here. Since then the mounds have partly sublimated away.
You can also see evidence of layers in the material surrounding the nearby larger mounds.
The map below shows us where this image is, relative to all of glacier country as well as the rover Perseverance in Jezero Crater.
» Read more
Cool image time. The photo to the right, cropped and reduced to post here, was taken on August 30, 2021 by the high resolution camera on Mars Reconnaissance Orbiter (MRO). It shows two different impact craters in a glacial region dubbed Nilosyrtis Mensae, located in the northern mid-latitudes in the 2,000 mile long strip chaos terrain that I have labeled glacier country because practically every image finds them there.
The splash apron surrounding the larger crater is typical of craters in Martian regions where ice is thought to be near the surface.
What makes this picture interesting is that the glaciers appear layered. You can see evidence of this in the mounds inside both craters. Those mounds appear to represent earlier periods when there was more ice here. Since then the mounds have partly sublimated away.
You can also see evidence of layers in the material surrounding the nearby larger mounds.
The map below shows us where this image is, relative to all of glacier country as well as the rover Perseverance in Jezero Crater.
» Read more