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The Columbia Hills are a range of low hills inside
Gusev crater Gusev is a crater on the planet Mars and is located at and is in the Aeolis quadrangle. The crater is about 166 kilometers in diameter and formed approximately three to four billion years ago. It was named after Russian astronomer Matvey Gusev ...
on
Mars Mars is the fourth planet from the Sun and the second-smallest planet in the Solar System, only being larger than Mercury (planet), Mercury. In the English language, Mars is named for the Mars (mythology), Roman god of war. Mars is a terr ...
. They were observed by the
Mars Exploration Rover NASA's Mars Exploration Rover (MER) mission was a robotic space mission involving two Mars rovers, ''Spirit (rover), Spirit'' and ''Opportunity (rover), Opportunity'', exploring the planet Mars. It began in 2003 with the launch of the two rover ...
''
Spirit Spirit or spirits may refer to: Liquor and other volatile liquids * Spirits, a.k.a. liquor, distilled alcoholic drinks * Spirit or tincture, an extract of plant or animal material dissolved in ethanol * Volatile (especially flammable) liquids, ...
'' when it landed within the crater in 2004. They were promptly given an unofficial name by
NASA The National Aeronautics and Space Administration (NASA ) is an independent agency of the US federal government responsible for the civil space program, aeronautics research, and space research. NASA was established in 1958, succeeding t ...
since they were the most striking nearby feature on the surface. The hills lie approximately away from the rover's original landing position. The range is named to memorialize the Space Shuttle ''Columbia'' disaster. On February 2, 2004, the individual peaks of the Columbia Hills were named after the seven astronauts who died in the disaster. ''Spirit'' spent a few years exploring the Columbia Hills until it ceased to function in 2010. It was also considered a potential landing site for the
Mars 2020 Mars 2020 is a Mars rover mission forming part of NASA's Mars Exploration Program that includes the rover '' Perseverance'', the small robotic, coaxial helicopter '' Ingenuity'', and associated delivery vehicles. Mars 2020 was launched from ...
''Perseverance'' rover, before the selection of
Jezero crater Jezero is a crater on Mars in the Syrtis Major quadrangle, about in diameter. Thought to have once been flooded with water, the crater contains a fan- delta deposit rich in clays. The lake in the crater was present when valley networks were for ...
in November 2018.


Peaks

The seven peaks are, from north to south: * Anderson Hill - named after
Michael P. Anderson Michael Phillip Anderson (December 25, 1959 – February 1, 2003) was a United States Air Force officer and NASA astronaut. Anderson and his six fellow crew members were killed in the Space Shuttle ''Columbia'' disaster when the craft disintegrat ...
* Brown Hill - named after
David M. Brown David McDowell Brown (April 16, 1956 – February 1, 2003) was a United States Navy captain and a NASA astronaut. He died on his first spaceflight, when the Space Shuttle ''Columbia'' (STS-107) disintegrated during orbital reentry into the Eart ...
* Chawla Hill - named after
Kalpana Chawla Kalpana Chawla (17 March 1962 – 1 February 2003) was an Indian-born American astronaut and mechanical engineer who was the first woman of Indian origin to go to space. She first flew on Space Shuttle Columbia, Space Shuttle ''Columbia'' in 199 ...
* Clark Hill - named after
Laurel Clark Laurel Blair Clark (née Salton; March 10, 1961 – February 1, 2003) was a NASA astronaut, medical doctor, United States Navy captain, and Space Shuttle mission specialist. Clark died along with her six fellow crew members in the Space Shuttle ...
* Husband Hill - named after
Rick Husband Richard Douglas Husband (July 12, 1957 – February 1, 2003) was an American astronaut and fighter pilot. He traveled into space twice: as Pilot of STS-96 and Commander of STS-107. He and the rest of the crew of STS-107 were killed when ''Col ...
* McCool Hill - named after
William C. McCool William Cameron "Willie" McCool (September 23, 1961 – February 1, 2003) ( Cmdr, USN) was an American naval officer and aviator, test pilot, aeronautical engineer, and NASA astronaut, who was the pilot of Space Shuttle ''Columbia'' mission S ...
* Ramon Hill - named after
Ilan Ramon Ilan Ramon ( he, אילן רמון; , born Ilan Wolfferman ; June 20, 1954 – February 1, 2003) was an Israeli fighter pilot and later the first Israeli astronaut. Ramon was a Space Shuttle payload specialist of STS-107, the fatal mission of ...


Rocks and Minerals of Columbia Hills

With the ''Spirit'' rover, scientists found a variety of rock types in the Columbia Hills, and they placed them into six different categories, each named after a prominent rock in the respective group: Clovis, Wishbone, Peace, Watchtower, Backstay, and Independence. Their chemical compositions, as measured by APXS, are significantly different from each other. Most importantly, all of the rocks in Columbia Hills show various degrees of alteration by aqueous fluids. They are enriched in the elements
phosphorus Phosphorus is a chemical element with the symbol P and atomic number 15. Elemental phosphorus exists in two major forms, white phosphorus and red phosphorus, but because it is highly reactive, phosphorus is never found as a free element on Ear ...
,
sulfur Sulfur (or sulphur in British English) is a chemical element with the symbol S and atomic number 16. It is abundant, multivalent and nonmetallic. Under normal conditions, sulfur atoms form cyclic octatomic molecules with a chemical formula ...
,
chlorine Chlorine is a chemical element with the Symbol (chemistry), symbol Cl and atomic number 17. The second-lightest of the halogens, it appears between fluorine and bromine in the periodic table and its properties are mostly intermediate betwee ...
, and
bromine Bromine is a chemical element with the symbol Br and atomic number 35. It is the third-lightest element in group 17 of the periodic table (halogens) and is a volatile red-brown liquid at room temperature that evaporates readily to form a simila ...
—all of which can be carried around in water solutions. The Columbia Hills’ rocks contain basaltic glass, along with varying amounts of
olivine The mineral olivine () is a magnesium iron silicate with the chemical formula . It is a type of nesosilicate or orthosilicate. The primary component of the Earth's upper mantle, it is a common mineral in Earth's subsurface, but weathers quickl ...
and
sulfate The sulfate or sulphate ion is a polyatomic anion with the empirical formula . Salts, acid derivatives, and peroxides of sulfate are widely used in industry. Sulfates occur widely in everyday life. Sulfates are salts of sulfuric acid and many ar ...
s. The olivine abundance varies inversely with the amount of sulfates. This is exactly what is expected because water destroys olivine but helps to produce sulfates. Acid fog is believed to have changed some of the Watchtower rocks. This was in a 200 meter long section of Cumberland Ridge and the Husband Hill summit. Certain places became less crystalline and more amorphous. Acidic water vapor from volcanoes dissolved some minerals forming a gel. When water evaporated a cement formed and produced small bumps. This type of process has been observed in the lab when basalt rocks are exposed to sulfuric and hydrochloric acids. The Clovis group is especially interesting because the Mössbauer spectrometer (MB) detected
goethite Goethite (, ) is a mineral of the diaspore group, consisting of iron(III) oxide-hydroxide, specifically the "α" polymorph. It is found in soil and other low-temperature environments such as sediment. Goethite has been well known since ancient t ...
in it. Goethite forms only in the presence of
water Water (chemical formula ) is an inorganic, transparent, tasteless, odorless, and nearly colorless chemical substance, which is the main constituent of Earth's hydrosphere and the fluids of all known living organisms (in which it acts as a ...
, so its discovery is the first direct evidence of past water in the Columbia Hills's rocks. In addition, the MB spectra of rocks and outcrops displayed a strong decline in olivine presence, although the rocks probably once contained much olivine. Olivine is a marker for the lack of water because it easily decomposes in the presence of water. Sulfate was found, and it needs water to form. Wishstone contained a great deal of
plagioclase Plagioclase is a series of tectosilicate (framework silicate) minerals within the feldspar group. Rather than referring to a particular mineral with a specific chemical composition, plagioclase is a continuous solid solution series, more prope ...
, some
olivine The mineral olivine () is a magnesium iron silicate with the chemical formula . It is a type of nesosilicate or orthosilicate. The primary component of the Earth's upper mantle, it is a common mineral in Earth's subsurface, but weathers quickl ...
, and
anhydrite Anhydrite, or anhydrous calcium sulfate, is a mineral with the chemical formula CaSO4. It is in the orthorhombic crystal system, with three directions of perfect cleavage parallel to the three planes of symmetry. It is not isomorphous with the ...
(a calcium sulfate). Peace rocks showed
sulfur Sulfur (or sulphur in British English) is a chemical element with the symbol S and atomic number 16. It is abundant, multivalent and nonmetallic. Under normal conditions, sulfur atoms form cyclic octatomic molecules with a chemical formula ...
and strong evidence for bound water, so hydrated sulfates are suspected. Watchtower class rocks lack olivine, implying that they may have been altered by water. The Independence class showed some signs of
clay Clay is a type of fine-grained natural soil material containing clay minerals (hydrous aluminium phyllosilicates, e.g. kaolin, Al2 Si2 O5( OH)4). Clays develop plasticity when wet, due to a molecular film of water surrounding the clay par ...
(perhaps
montmorillonite Montmorillonite is a very soft phyllosilicate group of minerals that form when they precipitate from water solution as microscopic crystals, known as clay. It is named after Montmorillon in France. Montmorillonite, a member of the smectite gro ...
, a member of the
smectite A smectite (from ancient Greek ''σμηκτός'' smektos 'lubricated'; ''σμηκτρίς'' smektris 'walker's earth', 'fuller's earth'; rubbing earth; earth that has the property of cleaning) is a mineral mixtures of various swelling sheet sil ...
group). Clays require fairly long term exposure to water to form. One type of soil, called Paso Robles, from the Columbia Hills, may be an evaporate deposit because it contains large amounts of sulfur,
phosphorus Phosphorus is a chemical element with the symbol P and atomic number 15. Elemental phosphorus exists in two major forms, white phosphorus and red phosphorus, but because it is highly reactive, phosphorus is never found as a free element on Ear ...
,
calcium Calcium is a chemical element with the symbol Ca and atomic number 20. As an alkaline earth metal, calcium is a reactive metal that forms a dark oxide-nitride layer when exposed to air. Its physical and chemical properties are most similar to ...
, and
iron Iron () is a chemical element with symbol Fe (from la, ferrum) and atomic number 26. It is a metal that belongs to the first transition series and group 8 of the periodic table. It is, by mass, the most common element on Earth, right in f ...
. Also, MB found that much of the iron in Paso Robles soil was of the oxidized, Fe+++ form, which would happen if water had been present. Towards the middle of the six-year mission (a mission that was supposed to last only 90 days), large amounts of pure
silica Silicon dioxide, also known as silica, is an oxide of silicon with the chemical formula , most commonly found in nature as quartz and in various living organisms. In many parts of the world, silica is the major constituent of sand. Silica is one ...
were found in the soil. The silica could have come from the interaction of soil with acid vapors produced by volcanic activity in the presence of water or from water in a hot spring environment. After ''Spirit'' stopped working scientists studied old data from the Miniature Thermal Emission Spectrometer ( Mini-TES) and confirmed the presence of large amounts of
carbonate A carbonate is a salt of carbonic acid (H2CO3), characterized by the presence of the carbonate ion, a polyatomic ion with the formula . The word ''carbonate'' may also refer to a carbonate ester, an organic compound containing the carbonate g ...
-rich rocks, which means that regions of the planet may have once harbored water. The carbonates were discovered in an outcrop of rocks called "Comanche." Richard V. Morris, Steven W. Ruff, Ralf Gellert, Douglas W. Ming, Raymond E. Arvidson, Benton C. Clark, D. C. Golden, Kirsten Siebach, Göstar Klingelhöfer, Christian Schröder, Iris Fleischer, Albert S. Yen, Steven W. Squyres. Identification of Carbonate-Rich Outcrops on Mars by the Spirit Rover. ''Science'', June 3, 2010


See also

*
Apollo 1 Hills The Apollo 1 Hills are three hills on Mars named to memorialize the crew of Apollo 1. The three hills were some of the first landmarks sighted following the January 7, 2004, landing of the ''Spirit'' rover on Mars. Background NASA astronauts G ...
*
Geography of Mars Areography, also known as the geography of Mars, is a subfield of planetary science that entails the delineation and characterization of regions on Mars. Areography is mainly focused on what is called physical geography on Earth; that is the di ...
*
Composition of Mars The composition of Mars covers the branch of the geology of Mars that describes the make-up of the planet Mars. Elemental composition Mars is differentiated, which—for a terrestrial planet—implies that it has a central core made up of me ...
*
Aeolis quadrangle The Aeolis quadrangle is one of a series of 30 quadrangle maps of Mars used by the United States Geological Survey (USGS) Astrogeology Research Program. The Aeolis quadrangle is also referred to as MC-23 (Mars Chart-23). The Aeolis quadrangle c ...


References


External links


Google Mars
infrared Infrared (IR), sometimes called infrared light, is electromagnetic radiation (EMR) with wavelengths longer than those of visible light. It is therefore invisible to the human eye. IR is generally understood to encompass wavelengths from around ...
view of the Columbia Hills
Official Mars Rovers site

Everest panorama
- anaglyph view from the top of Husband Hill. For a better view open this URL in
QuickTime Player QuickTime is an extensible multimedia framework developed by Apple Inc., capable of handling various formats of digital video, picture, sound, panoramic images, and interactivity. Created in 1991, the latest Mac version, QuickTime X, is av ...
and then maximize the player. Red-blue glasses required. {{Space Shuttle Columbia Hills on Mars Mars 2020 Kalpana Chawla Space Shuttle Columbia disaster Aeolis quadrangle