Kufra (crater)
Kufra is a crater in the Cebrenia quadrangle of Mars , located at 40.7° North and 239.77° West, the westernmost portion is inside Casius quadrangle . It is 37.5 kilometers in diameter and was named after a town in Libya . [1]
Page Revisions
| Year | Metadata | Sections | Top Words | First Paragraph |
| 2018 |
79625 characters 4 sections 9 paragraphs 5 images 661 internal links 5 external links |
kufra 0.459 gullies 0.416 changes 0.228 dry 0.162 frost 0.153 incised 0.148 rynok 0.122 gully 0.122 bacolor 0.115 chincoteague 0.115 arrows 0.112 ctx 0.112 craters 0.109 photo 0.102 glaciers 0.101 |
Kufra is a crater in the Cebrenia quadrangle of Mars , located at 40.7° North and 239.77° West, the westernmost portion is inside Casius quadrangle . It is 37.5 kilometers in diameter and was named after a town in Libya . [1] |
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| 2017 |
38230 characters 4 sections 9 paragraphs 8 images 169 internal links 5 external links |
kufra 0.459 gullies 0.416 changes 0.228 dry 0.162 frost 0.153 incised 0.148 rynok 0.122 gully 0.122 bacolor 0.115 chincoteague 0.115 arrows 0.112 ctx 0.112 craters 0.109 photo 0.102 glaciers 0.101 |
Kufra is a crater in the Cebrenia quadrangle of Mars , located at 40.7° North and 239.77° West, the westernmost portion is inside Casius quadrangle . It is 37.5 kilometers in diameter and was named after a town in Libya . [1] |
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| 2015 |
35791 characters 3 sections 6 paragraphs 8 images 160 internal links 6 external links |
kufra 0.450 gullies 0.408 changes 0.224 dry 0.159 frost 0.150 incised 0.145 ice 0.135 craters 0.128 gully 0.119 arrows 0.110 ctx 0.109 photo 0.100 rich 0.100 glaciers 0.099 crater 0.094 |
Kufra Crater is a crater in the Cebrenia quadrangle of Mars, located at 40.7° North and 239.77° West. It is 37.5 km in diameter and was named after a town in Libya . [1] Gullies are visible on its wall. Martian gullies are small, incised networks of narrow channels and their associated downslope sediment deposits, found on the planet of Mars . They are named for their resemblance to terrestrial gullies . First discovered on images from Mars Global Surveyor , they occur on steep slopes, especially on the walls of craters. Usually, each gully has a dendritic alcove at its head, a fan-shaped apron at its base, and a single thread of incised channel linking the two, giving the whole gully an hourglass shape. [2] They are believed to be relatively young because they have few, if any craters. A subclass of gullies is also found cut into the faces of sand dunes which themselves considered to be quite young. On the basis of their form, aspects, positions, and location amongst and apparent interaction with features thought to be rich in water ice, many researchers believed that the processes carving the gullies involve liquid water. However, this remains a topic of active research. As soon as gullies were discovered, [2] researchers began to image many gullies over and over, looking for possible changes. By 2006, some changes were found. [3] Later, with further analysis it was determined that the changes could have occurred by dry granular flows rather than being driven by flowing water. [4] [5] [6] With continued observations many more changes were found in Gasa Crater and others. [7] With more repeated observations, more and more changes have been found; since the changes occur in the winter and spring, experts are tending to believe that gullies were formed from dry ice. Before-and-after images demonstrated the timing of this activity coincided with seasonal carbon-dioxide frost and temperatures that would not have allowed for liquid water. When dry ice frost changes to a gas, it may lubricate dry material to flow especially on steep slopes. [8] [9] [10] In some years frost, perhaps as thick as 1 meter, |
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| 2014 |
39092 characters 3 sections 7 paragraphs 10 images 168 internal links 6 external links |
kufra 0.450 gullies 0.408 changes 0.224 dry 0.159 frost 0.150 incised 0.145 ice 0.135 craters 0.128 gully 0.119 arrows 0.110 ctx 0.109 photo 0.100 rich 0.100 glaciers 0.099 crater 0.094 |
Kufra Crater is a crater in the Cebrenia quadrangle of Mars, located at 40.7° North and 239.77° West. It is 37.5 km in diameter and was named after a town in Libya . [1] Gullies are visible on its wall. Martian gullies are small, incised networks of narrow channels and their associated downslope sediment deposits, found on the planet of Mars . They are named for their resemblance to terrestrial gullies . First discovered on images from Mars Global Surveyor , they occur on steep slopes, especially on the walls of craters. Usually, each gully has a dendritic alcove at its head, a fan-shaped apron at its base, and a single thread of incised channel linking the two, giving the whole gully an hourglass shape. [2] They are believed to be relatively young because they have few, if any craters. A subclass of gullies is also found cut into the faces of sand dunes which themselves considered to be quite young. On the basis of their form, aspects, positions, and location amongst and apparent interaction with features thought to be rich in water ice, many researchers believed that the processes carving the gullies involve liquid water. However, this remains a topic of active research. As soon as gullies were discovered, [2] researchers began to image many gullies over and over, looking for possible changes. By 2006, some changes were found. [3] Later, with further analysis it was determined that the changes could have occurred by dry granular flows rather than being driven by flowing water. [4] [5] [6] With continued observations many more changes were found in Gasa Crater and others. [7] With more repeated observations, more and more changes have been found; since the changes occur in the winter and spring, experts are tending to believe that gullies were formed from dry ice. Before-and-after images demonstrated the timing of this activity coincided with seasonal carbon-dioxide frost and temperatures that would not have allowed for liquid water. When dry ice frost changes to a gas, it may lubricate dry material to flow especially on steep slopes. [8] [9] [10] In some years frost, perhaps as thick as 1 meter, |
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| 2013 |
27792 characters 1 sections 2 paragraphs 7 images 158 internal links 1 external links |
kufra 0.516 239 0.413 libya 0.413 cebrenia 0.345 77 0.283 town 0.244 37 0.228 40 0.146 crater 0.123 west 0.101 north 0.090 7 0.087 quadrangle 0.075 diameter 0.069 located 0.061 |
Kufra Crater is a crater in the Cebrenia quadrangle of Mars, located at 40.7° North and 239.77° West. It is 37.5 km in diameter and was named after a town in Libya . [1] |
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| 2011 |
6485 characters 1 sections 2 paragraphs 3 images 13 internal links 1 external links |
kufra 0.516 239 0.413 libya 0.413 cebrenia 0.345 77 0.283 town 0.244 37 0.228 40 0.146 crater 0.123 west 0.101 north 0.090 7 0.087 quadrangle 0.075 diameter 0.069 located 0.061 |
Kufra Crater is a crater in the Cebrenia quadrangle of Mars, located at 40.7° North and 239.77° West. It is 37.5 km in diameter and was named after a town in Libya . [1] |
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| 2010 |
5892 characters 1 sections 2 paragraphs 3 images 9 internal links 1 external links |
kufra 0.724 239 0.289 libya 0.289 cebrenia 0.242 escaping 0.223 77 0.199 town 0.171 pits 0.164 37 0.159 crater 0.129 40 0.102 floor 0.099 hirise 0.087 caused 0.074 thought 0.071 |
Kufra Crater is a crater in the Cebrenia quadrangle of Mars, located at 40.7° North and 239.77° West. It is 37.5 km in diameter and was named after a town in Libya . [1] |
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| 2009 |
5839 characters 1 sections 2 paragraphs 3 images 8 internal links 1 external links |
kufra 0.734 239 0.293 libya 0.293 cebrenia 0.245 escaping 0.226 town 0.173 pits 0.166 37 0.162 crater 0.131 7 0.124 40 0.104 floor 0.100 hirise 0.088 caused 0.075 thought 0.072 |
Kufra Crater is a crater in the Cebrenia quadrangle of Mars, located at 40.7 North and 239.7 West. It is 37.5 km in diameter and was named after a town in Libya. [1] |