Potentially habitable flow-like features from Martian dry ice geyser dune spots: Difference between revisions
Jump to navigation
Jump to search
Content added Content deleted
No edit summary |
|||
| Line 1: | Line 1: | ||
[[File:Flow-like-features detail.gif|thumb|Flow-like-features detail|Flow-like features on Dunes in Richardson Crater, Mars. They form around the dark dune spots, in the debris of the hypothesized [[:en:Geyser_(Mars)|Martian Geysers]]. The dark material at the end of the flows moves at between 0.1 and 1.4 m/day in late spring / summer on Mars. This example moves approximately 39 meters in 26 days between the last two frames. All the current models for it favour processes involving liquid water as a cause. Either interfacial layers, or else layers of water created through the solid state greenhouse effect. <ref name="MartínezRenno2013">{{cite journal|url=https://link.springer.com/article/10.1007%2Fs11214-012-9956-3/fulltext.html|last1=Martínez|first1=G. M.|last2=Renno|first2=N. O.|title=Water and Brines on Mars: Current Evidence and Implications for MSL|journal=Space Science Reviews|volume=175|issue=1-4|year=2013|pages=29–51|issn=0038-6308|doi=10.1007/s11214-012-9956-3}}</ref><ref name=Kereszturi2008>Kereszturi, A., et al. [http://www.lpi.usra.edu/meetings/lpsc2008/pdf/1555.pdf "Analysis of possible interfacial water driven seepages on Mars"], Lunar and Planetary Science Conference. Vol. 39. 2008.</ref><ref name="MartínezRenno2013">{{cite journal|url=https://link.springer.com/article/10.1007%2Fs11214-012-9956-3/fulltext.html|last1=Martínez|first1=G. M.|last2=Renno|first2=N. O.|title=Water and Brines on Mars: Current Evidence and Implications for MSL|journal=Space Science Reviews|volume=175|issue=1-4|year=2013|pages=29–51|issn=0038-6308|doi=10.1007/s11214-012-9956-3}}</ref> |
|||
Animation centered on Lattitude -72.02, Longtitude, 179.408. Displayed region is 188.5 meters by 172 meters in size. Dates of the sequence: 19 January (sol 396), 24 January (sol 401), 29 January (sol 406), 10 February (sol 418), and 09 March (sol 444), all taken in 2009. The photos were all taken between 4.10 pm and 4.28 pm in Mars local time.]] |
|||
These intriguing high latitude features are associated with the [[Geyser (Mars)|Martian Geysers]]. The geysers themselves (if that is what they are) are thought to be results of dry ice turning to gas. The dark spots - which at one point were thought to be photosynthetic life, are now thought to be the debris from the geysers. |
These intriguing high latitude features are associated with the [[Geyser (Mars)|Martian Geysers]]. The geysers themselves (if that is what they are) are thought to be results of dry ice turning to gas. The dark spots - which at one point were thought to be photosynthetic life, are now thought to be the debris from the geysers. |
||
However, later in the year the flow like features extend down the slopes from the dark spots, sometimes at a rate of meters per day. The details differ for the two hemispheres. |
However, later in the year the flow like features extend down the slopes from the dark spots, sometimes at a rate of meters per day. The details differ for the two hemispheres. |
||
