Yardangs on Mars
Yardangs are common in some regions on Mars, especially in the Medusae Fossae Formation . This formation is found in the Amazonis quadrangle and near the equator. [1] They are formed by the action of wind on sand sized particles; hence they often point in the prevailing direction that the winds were blowing when they were formed. [2] [3] Because they exhibit very few impact craters they are believed to be relatively young. [4] The easily eroded nature of the Medusae Fossae Formation suggests that it is composed of weakly cemented particles, and was most likely formed by the deposition of wind-blown dust or volcanic ash . Yardangs are parts of rock that have been sand blasted into long, skinny ridges by bouncing sand particles blowing in the wind. [5] [6] Layers are seen in parts of the formation. A resistant caprock on the top of yardangs has been observed in Viking, [7] Mars Global Surveyor , [8] and HiRISE photos. [9] Images from spacecraft show that they have different degrees of hardness probably because of significant variations in the physical properties, composition, particle size, and/or cementation .
Page Revisions
| Year | Metadata | Sections | Top Words | First Paragraph |
| 2018 |
88985 characters 2 sections 13 paragraphs 14 images 653 internal links 14 external links |
yardangs 0.775 hiwish 0.256 amazonis 0.204 hirise 0.183 gordii 0.168 medusae 0.165 dorsum 0.141 program 0.135 memnonia 0.114 location 0.109 fossae 0.104 formation 0.092 quadrangle 0.083 sand 0.082 blowing 0.081 |
Yardangs are common in some regions on Mars, especially in the Medusae Fossae Formation . This formation is found in the Amazonis quadrangle and near the equator. [1] They are formed by the action of wind on sand sized particles; hence they often point in the prevailing direction that the winds were blowing when they were formed. [2] [3] Because they exhibit very few impact craters they are believed to be relatively young. [4] The easily eroded nature of the Medusae Fossae Formation suggests that it is composed of weakly cemented particles, and was most likely formed by the deposition of wind-blown dust or volcanic ash . Yardangs are parts of rock that have been sand blasted into long, skinny ridges by bouncing sand particles blowing in the wind. [5] [6] Layers are seen in parts of the formation. A resistant caprock on the top of yardangs has been observed in Viking, [7] Mars Global Surveyor , [8] and HiRISE photos. [9] Images from spacecraft show that they have different degrees of hardness probably because of significant variations in the physical properties, composition, particle size, and/or cementation . |
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| 2017 |
46907 characters 2 sections 16 paragraphs 18 images 160 internal links 12 external links |
yardangs 0.779 hiwish 0.258 hirise 0.208 medusae 0.177 amazonis 0.175 gordii 0.143 program 0.136 memnonia 0.130 dorsum 0.120 location 0.116 fossae 0.111 caprock 0.103 formation 0.092 quadrangle 0.087 image 0.084 |
Yardangs are common in some regions on Mars, especially in what's called the " Medusae Fossae Formation ." This formation is found in the Amazonis quadrangle and near the equator. [1] They are formed by the action of wind on sand sized particles; hence they often point in the direction that the winds were blowing when they were formed. [2] Because they exhibit very few impact craters they are believed to be relatively young. [3] The easily eroded nature of the Medusae Fossae Formation suggests that it is composed of weakly cemented particles, and was most likely formed by the deposition of wind-blown dust or volcanic ash . Yardangs are parts of rock that have been sand blasted into long, skinny ridges by bouncing sand particles blowing in the wind. [4] [5] Layers are seen in parts of the formation. A resistant caprock on the top of yardangs has been observed in Viking, [6] Mars Global Surveyor , [7] and HiRISE photos. [8] Images from spacecraft show that they have different degrees of hardness probably because of significant variations in the physical properties, composition, particle size, and/or cementation . |
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| 2016 |
45765 characters 2 sections 15 paragraphs 17 images 159 internal links 12 external links |
yardangs 0.764 hiwish 0.260 hirise 0.213 medusae 0.192 amazonis 0.190 gordii 0.156 program 0.137 dorsum 0.131 fossae 0.121 location 0.114 caprock 0.112 memnonia 0.106 formation 0.100 quadrangle 0.086 sand 0.077 |
Yardangs are common in some regions on Mars, especially in what's called the " Medusae Fossae Formation ." This formation is found in the Amazonis quadrangle and near the equator. [1] They are formed by the action of wind on sand sized particles; hence they often point in the direction that the winds were blowing when they were formed. [2] Because they exhibit very few impact craters they are believed to be relatively young. [3] The easily eroded nature of the Medusae Fossae Formation suggests that it is composed of weakly cemented particles, and was most likely formed by the deposition of wind-blown dust or volcanic ash . Yardangs are parts of rock that have been sand blasted into long, skinny ridges by bouncing sand particles blowing in the wind. [4] [5] Layers are seen in parts of the formation. A resistant caprock on the top of yardangs has been observed in Viking, [6] Mars Global Surveyor , [7] and HiRISE photos. [8] Images from spacecraft show that they have different degrees of hardness probably because of significant variations in the physical properties, composition, particle size, and/or cementation . |
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| 2015 |
41082 characters 2 sections 10 paragraphs 12 images 157 internal links 12 external links |
yardangs 0.756 medusae 0.264 hiwish 0.208 hirise 0.194 fossae 0.166 amazonis 0.156 caprock 0.154 formation 0.137 program 0.110 sand 0.105 blowing 0.103 skinny 0.086 aeolis 0.086 sizes 0.077 particles 0.076 |
Yardangs are common in some regions on Mars, especially in what's called the " Medusae Fossae Formation ." This formation is found in the Amazonis quadrangle and near the equator. [1] They are formed by the action of wind on sand sized particles; hence they often point in the direction that the winds were blowing when they were formed. [2] Because they exhibit very few impact craters they are believed to be relatively young. [3] The easily eroded nature of the Medusae Fossae Formation suggests that it is composed of weakly cemented particles, and was most likely formed by the deposition of wind-blown dust or volcanic ash . Yardangs are parts of rock that have been sand blasted into long, skinny ridges by bouncing sand particles blowing in the wind. [4] [5] Layers are seen in parts of the formation. A resistant caprock on the top of yardangs has been observed in Viking, [6] Mars Global Surveyor , [7] and HiRISE photos. [8] Images from spacecraft show that they have different degrees of hardness probably because of significant variations in the physical properties, composition, particle size, and/or cementation . |