Difference between revisions of "Columbus Crater"
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==Other minerals== | ==Other minerals== | ||
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Image:Columbus Crater Layers.JPG|Columbus Crater Layers, as seen by HiRISE. This false-color image is about 800 feet across. Some of the layers contain hydrated minerals. | Image:Columbus Crater Layers.JPG|Columbus Crater Layers, as seen by HiRISE. This false-color image is about 800 feet across. Some of the layers contain hydrated minerals. | ||
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Image:Columbus Crater close-up.jpg|Close-up of Columbus Crater, as seen by HiRISE | Image:Columbus Crater close-up.jpg|Close-up of Columbus Crater, as seen by HiRISE | ||
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==See also== | ==See also== | ||
Revision as of 15:13, 19 August 2021
Columbus Crater is a 119 km wide crater, located at 29.8° south latitude and 166.1° west longitude in the Memnonia quadrangle, and was named after Christopher Columbus[1] Since sulfates and clay minerals have been discovered within Columbus Crater it is believed that a lake once existed in the crater. These minerals need water to form.[2][3] These were found using an orbiting near-infrared spectrometer. Spectrometers reveal the types of minerals present based on the wavelengths of light they absorb. These minerals would appear if a large lake had slowly evaporated.[4] [5] Because some layers contain gypsum, a sulfate which forms in relatively fresh water, it is thought that life could have formed in the crater.[6]
Other minerals
In the layers, or strata, of Columbus Crater, the CRISM instrument on the Mars Reconnaissance Orbiter found kaolinite, hydrated sulfates including alunite and possibly Jarosite]].[7] Further study concluded that gypsum, polyhydrated and monohydrated Mg/Fe-sulfates were common and small deposits of montmorillonite, Fe/Mg-phyllosilicates, and crystalline ferric oxide or hydroxide were also found. Thermal emission spectra hint that some minerals were present in the tens of percent range.[8] [9]
Columbus Crater Layers, as seen by HiRISE. This false-color image is about 800 feet across. Some of the layers contain hydrated minerals.
Close-up of Columbus Crater, as seen by HiRISE
See also
References
- ↑ https://planetarynames.wr.usgs.gov/Feature/1274
- ↑ http://www.nasa.gov/mission_pages/msl/multimedia/pia15099.html#.VWyD-c9VhBc
- ↑ Wray, J., R. Milliken, C. Dundas, G. Swayze, J. Andrews-Hanna, A. Baldridge, M. Chojnacki, J. Bishop, B. Ehlmann, S. Murchie, R. Clark, F. Seelos, L. Tornabene, and S. Squyres. 2011. Columbus crater and other possible groundwater-fed paleolakes of Terra Sirenum, Mars. Journal of Geophysical Research E: Planets DOI: 10.1029/2010JE003694
- ↑ Cabrol, N. and E. Grin (eds.). 2010. Lakes on Mars. Elsevier.NY.
- ↑ Wray, J. et al. 2009. Columbus Crater and other possible plaelakes in Terra Sirenum, Mars. Lunar and Planetary Science Conference. 40: 1896.
- ↑ http://news.nationalgeographic.com/news/2009/11/091125-mars-crater-lake-michigan-water_2.html
- ↑ Murchie, S. et al. 2009. A synthesis of Martian aqueous mineralogy after 1 Mars year of observations from the Mars Reconnaissance Orbiter. Journal of Geophysical Research: 114.
- ↑ https://pubs.er.usgs.gov/publication/70035986
- ↑ Wray, J., R. Milliken, C. Dundas, G. Swayze, J. Andrews-Hanna, A. Baldridge, M. Chojnacki, J. Bishop, B. Ehlmann, S. Murchie, R. Clark, F. Seelos, L. Tornabene, and S. Squyres. 2011. Columbus crater and other possible groundwater-fed paleolakes of Terra Sirenum, Mars. Journal of Geophysical Research E: Planets DOI: 10.1029/2010JE003694
