Olympus Mons - wikipedia Olympus Mons Not to be confused with Olympos Mons. Olympus Mons Viking 1 orbiter view of Olympus Mons with its summit caldera, escarpment, and aureole Coordinates 18 ° 39 ′ N 226 ° 12 ′ E ﻿ / ﻿ 18.65 ° N 226.2 ° E ﻿ / 18.65 ; 226.2 Coordinates : 18 ° 39 ′ N 226 ° 12 ′ E ﻿ / ﻿ 18.65 ° N 226.2 ° E ﻿ / 18.65 ; 226.2 Tallest planetary mountain in the Solar System Peak 21,287.4 m ( 69,841 ft ) above datum 26 km ( 85,000 ft ) local relief 26 km ( 85,000 ft ) above plains Discoverer Mariner 9 Eponym Latin -- Mount Olympus Olympus Mons ( / əˌlɪmpəs ˈmɒnz, oʊ -, - ˈmɒns / ; Latin for Mount Olympus ) is a very large shield volcano on the planet Mars. By one measure, it has a height of nearly 25 km ( 13.6 mi or 72,000 ft ). Olympus Mons is about two and a half times Mount Everest 's height above sea level. It is the largest volcano, the tallest planetary mountain, and the second tallest mountain in the Solar System compared to Rheasilvia on Vesta. It is the youngest of the large volcanoes on Mars, having formed during Mars 's Hesperian Period. It had been known to astronomers since the late 19th century as the albedo feature Nix Olympica ( Latin for `` Olympic Snow '' ). Its mountainous nature was suspected well before space probes confirmed its identity as a mountain. The volcano is located in Mars 's western hemisphere at approximately 18 ° 39 ′ N 226 ° 12 ′ E ﻿ / ﻿ 18.65 ° N 226.2 ° E ﻿ / 18.65 ; 226.2, just off the northwestern edge of the Tharsis bulge. The western portion of the volcano lies in the Amazonis quadrangle ( MC - 8 ) and the central and eastern portions in the adjoining Tharsis quadrangle ( MC - 9 ). Two impact craters on Olympus Mons have been assigned provisional names by the International Astronomical Union. They are the 15.6 km ( 9.7 mi ) - diameter Karzok crater ( 18 ° 25 ′ N 131 ° 55 ′ W ﻿ / ﻿ 18.417 ° N 131.917 ° W ﻿ / 18.417 ; - 131.917 ) and the 10.4 km ( 6.5 mi ) - diameter Pangboche crater ( 17 ° 10 ′ N 133 ° 35 ′ W ﻿ / ﻿ 17.167 ° N 133.583 ° W ﻿ / 17.167 ; - 133.583 ). The craters are notable for being two of several suspected source areas for shergottites, the most abundant class of Martian meteorites. Contents 1 Description 2 Geology 3 Early observations and naming 4 Regional setting and surrounding features 5 Interactive Mars map 6 See also 7 References 8 External links Description Horizontal comparison of Olympus Mons with France Vertical comparison of Olympus Mons with Mount Everest ( shown sea - level - to - peak ) and Mauna Kea on Earth ( measurement is sea - level to peak, not base to peak ). As a shield volcano, Olympus Mons resembles the shape of the large volcanoes making up the Hawaiian Islands. The edifice is about 600 km ( 370 mi ) wide. Because the mountain is so large, with complex structure at its edges, allocating a height to it is difficult. Olympus Mons stands 21 km ( 13 mi ) above the Mars global datum, and its local relief, from the foot of the cliffs which form its northwest margin to its peak, is nearly 22 km ( 14 mi ) ( a little over twice the height of Mauna Kea as measured from its base on the ocean floor ). The total elevation change from the plains of Amazonis Planitia, over 1,000 km ( 620 mi ) to the northwest, to the summit approaches 26 km ( 16 mi ). The summit of the mountain has six nested calderas ( collapsed craters ) forming an irregular depression 60 km ( 37 mi ) × 80 km ( 50 mi ) across and up to 3.2 km ( 2.0 mi ) deep. The volcano 's outer edge consists of an escarpment, or cliff, up to 8 km ( 5.0 mi ) tall ( although obscured by lava flows in places ), a feature unique among the shield volcanoes of Mars. Olympus Mons covers an area of about 300,000 km ( 120,000 sq mi ), which is approximately the size of Italy, and it is supported by a 70 km ( 43 mi ) thick lithosphere. The extraordinary size of Olympus Mons is likely because Mars lacks mobile tectonic plates. Unlike on Earth, the crust of Mars remains fixed over a stationary hotspot, and a volcano can continue to discharge lava until it reaches an enormous height. Being a shield volcano, Olympus Mons has a very gently sloping profile. The average slope on the volcano 's flanks is only 5 °. Slopes are steepest near the middle part of the flanks and grow shallower toward the base, giving the flanks a concave upward profile. The shape of Olympus Mons is distinctly asymmetrical - its flanks are shallower and extend farther from the summit in the northwestern direction than they do to the southeast. The volcano 's shape and profile have been likened to a `` circus tent '' held up by a single pole that is shifted off center. Due to the size and shallow slopes of Olympus Mons, an observer standing on the Martian surface would be unable to view the entire profile of the volcano, even from a great distance. The curvature of the planet and the volcano itself would obscure such a synoptic view. Similarly, an observer near the summit would be unaware of standing on a very high mountain, as the slope of the volcano would extend far beyond the horizon, a mere 3 kilometers away. The typical atmospheric pressure at the top of Olympus Mons is 72 pascals, about 12 % of the average Martian surface pressure of 600 pascals. Both are exceedingly low by terrestrial standards ; by comparison, the atmospheric pressure at the summit of Mount Everest is 32,000 pascals, or about 32 % of Earth 's sea level pressure. Even so, high - altitude orographic clouds frequently drift over the Olympus Mons summit, and airborne Martian dust is still present. Although the average Martian surface atmospheric pressure is less than one percent of Earth 's, the much lower gravity of Mars increases the atmosphere 's scale height ; in other words, Mars 's atmosphere is expansive and does not drop off in density with height as sharply as Earth 's. The composition of Olympus Mons is approximately 44 % silicates, 17.5 % iron oxides ( which give the planet its red coloration ) 7 % aluminum, 6 % magnesium, 6 % calcium, and particularly high proportions of sulfur oxide with 7 %. These results point to the surface being largely composed of basalts and other mafic rocks, which would have erupted as low viscosity lava flows and hence lead to the low gradients on the surface of the planet. Olympus Mons is an unlikely landing location for automated space probes in the near future. The high elevations preclude parachute - assisted landings because the atmosphere is insufficiently dense to slow the spacecraft down. Moreover, Olympus Mons stands in one of the dustiest regions of Mars. A mantle of fine dust obscures the underlying bedrock, possibly making rock samples hard to come by and likely posing a significant obstacle for rovers. Geology Mars Global Surveyor image showing lava flows of different ages at the base of Olympus Mons. The flat plain is the younger flow. The older flow has lava channels with levees along the edges. Levees are quite common to lava flows on Mars. Olympus Mons is the result of many thousands of highly fluid, basaltic lava flows that poured from volcanic vents over a long period of time ( The Hawaiian Islands exemplify similar shield volcanoes on a smaller scale -- see Mauna Kea ). Like the basalt volcanoes on Earth, Martian basaltic volcanoes are capable of erupting enormous quantities of ash. Due to the reduced gravity of Mars compared to Earth, there are lesser buoyant forces on the magma rising out of the crust. In addition, the magma chambers are thought to be much larger and deeper than the ones found on Earth. Lava flows on Olympus Mons with older and younger flows labeled, as viewed by HiRISE during the HiWish program. The flanks of Olympus Mons are made up of innumerable lava flows and channels. Many of the flows have levees along their margins ( pictured ). The cooler, outer margins of the flow solidify, leaving a central trough of molten, flowing lava. Partially collapsed lava tubes are visible as chains of pit craters, and broad lava fans formed by lava emerging from intact, subsurface tubes are also common. In places along the volcano 's base, solidified lava flows can be seen spilling out into the surrounding plains, forming broad aprons, and burying the basal escarpment. Crater counts from high - resolution images taken by the Mars Express orbiter in 2004 indicate that lava flows on the northwestern flank of Olympus Mons range in age from 115 million years old ( Mya ) to only 2 Mya. These ages are very recent in geological terms, suggesting that the mountain may still be volcanically active, though in a very quiescent and episodic fashion. Calderas on the summit of Olympus Mons. The youngest calderas form circular collapse craters. Older calderas appear as semicircular segments because they are transected by the younger calderas. The caldera complex at the peak of the volcano is made of at least six overlapping calderas and caldera segments ( pictured ). Calderas are formed by roof collapse following depletion and withdrawal of the subsurface magma chamber after an eruption. Each caldera thus represents a separate pulse of volcanic activity on the mountain. The largest and oldest caldera segment appears to have formed as a single, large lava lake. Using geometric relationships of caldera dimensions from laboratory models, scientists have estimated that the magma chamber associated with the largest caldera on Olympus Mons lies at a depth of about 32 km ( 105,000 ft ) below the caldera floor. Crater size - frequency distributions on the caldera floors indicate the calderas range in age from 350 Mya to about 150 Mya. All probably formed within 100 million years of each other. Olympus Mons is asymmetrical structurally as well as topographically. The longer, more shallow northwestern flank displays extensional features, such as large slumps and normal faults. In contrast, the volcano 's steeper southeastern side has features indicating compression, including step - like terraces in the volcano 's mid-flank region ( interpreted as thrust faults ) and a number of wrinkle ridges located at the basal escarpment. Why opposite sides of the mountain should show different styles of deformation may lie in how large shield volcanoes grow laterally and in how variations within the volcanic substrate have affected the mountain 's final shape. Oblique view of Olympus Mons, from a Viking image mosaic overlain on MOLA altimetry data, showing the volcano 's asymmetry. The view is from the NNE ; vertical exaggeration is 10x. The wider, gently sloping northern flank is to the right. The more narrow and steeply sloping southern flank ( left ) has low, rounded terraces, features interpreted as thrust faults. The volcano 's basal escarpment is prominent. Large shield volcanoes grow not only by adding material to their flanks as erupted lava, but also by spreading laterally at their bases. As a volcano grows in size, the stress field underneath the volcano changes from compressional to extensional. A subterranean rift may develop at the base of the volcano, causing the underlying crust to spread apart. If the volcano rests on sediments containing mechanically weak layers ( e.g., beds of water - saturated clay ), detachment zones ( decollements ) may develop in the weak layers. The extensional stresses in the detachment zones can produce giant landslides and normal faults on the volcano 's flanks, leading to the formation of a basal escarpment. Further from the volcano, these detachment zones can express themselves as a succession of overlapping, gravity driven thrust faults. This mechanism has long been cited as an explanation of the Olympus Mons aureole deposits ( discussed below ). Detailed THEMIS daytime infrared image mosaic of Olympus Mons. Olympus Mons lies at the edge of the Tharsis bulge, an ancient vast volcanic plateau likely formed by the end of the Noachian Period. During the Hesperian, when Olympus Mons began to form, the volcano was located on a shallow slope that descended from the high in Tharsis into the northern lowland basins. Over time, these basins received large volumes of sediment eroded from Tharsis and the southern highlands. The sediments likely contained abundant Noachian - aged phyllosilicates ( clays ) formed during an early period on Mars when surface water was abundant, and were thickest in the northwest where basin depth was greatest. As the volcano grew through lateral spreading, low - friction detachment zones preferentially developed in the thicker sediment layers to the northwest, creating the basal escarpment and widespread lobes of aureole material ( Lycus Sulci ). Spreading also occurred to the southeast ; however, it was more constrained in that direction by the Tharsis rise, which presented a higher - friction zone at the volcano 's base. Friction was higher in that direction because the sediments were thinner and probably consisted of coarser grained material resistant to sliding. The competent and rugged basement rocks of Tharsis acted as an additional source of friction. This inhibition of southeasterly basal spreading in Olympus Mons could account for the structural and topographic asymmetry of the mountain. Numerical models of particle dynamics involving lateral differences in friction along the base of Olympus Mons have been shown to reproduce the volcano 's present shape and asymmetry fairly well. It has been speculated that the detachment along the weak layers was aided by the presence of high - pressure water in the sediment pore spaces, which would have interesting astrobiological implications. If water - saturated zones still exist in sediments under the volcano, they would likely have been kept warm by a high geothermal gradient and residual heat from the volcano 's magma chamber. Potential springs or seeps around the volcano would offer exciting possibilities for detecting microbial life. Early observations and naming Colorized topographic map of Olympus Mons and its surrounding aureole, from the MOLA instrument of Mars Global Surveyor. Olympus Mons and a few other volcanoes in the Tharsis region stand high enough to reach above the frequent Martian dust - storms recorded by telescopic observers as early as the 19th century. The astronomer Patrick Moore pointed out that Schiaparelli ( 1835 -- 1910 ) `` had found that his Nodus Gordis and Olympic Snow ( Nix Olympica ) were almost the only features to be seen '' during dust storms, and `` guessed correctly that they must be high ''. The Mariner 9 spacecraft arrived in orbit around Mars in 1971 during a global dust - storm. The first objects to become visible as the dust began to settle, the tops of the Tharsis volcanoes, demonstrated that the altitude of these features greatly exceeded that of any mountain found on Earth, as astronomers expected. Observations of the planet from Mariner 9 confirmed that Nix Olympica was not just a mountain, but a volcano. Ultimately, astronomers adopted the name Olympus Mons for the albedo feature known as Nix Olympica. Regional setting and surrounding features Olympus Rupes, the northern part of Olympus Mons. Olympus Mons is located between the northwestern edge of the Tharsis region and the eastern edge of Amazonis Planitia. It stands about 1,200 km ( 750 mi ) from the other three large Martian shield volcanoes, collectively called the Tharsis Montes ( Arsia Mons, Pavonis Mons, and Ascraeus Mons ). The Tharsis Montes are slightly smaller than Olympus Mons. A wide, annular depression or moat about 2 km ( 1.2 mi ) deep surrounds the base of Olympus Mons and is thought to be due to the volcano 's immense weight pressing down on the Martian crust. The depth of this depression is greater on the northwest side of the mountain than on the southeast side. Olympus Mons is partially surrounded by a region of distinctive grooved or corrugated terrain known as the Olympus Mons aureole. The aureole consists of several large lobes. Northwest of the volcano, the aureole extends a distance of up to 750 km ( 470 mi ) and is known as Lycus Sulci ( 24 ° 36 ′ N 219 ° 00 ′ E ﻿ / ﻿ 24.6 ° N 219 ° E ﻿ / 24.6 ; 219 ). East of Olympus Mons, the aureole is partially covered by lava flows, but where it is exposed it goes by different names ( Gigas Sulci, for example ). The origin of the aureole remains debated, but it was likely formed by huge landslides or gravity - driven thrust sheets that sloughed off the edges of the Olympus Mons shield. Interactive Mars map Interactive imagemap of the global topography of Mars. Hover your mouse to see the names of over 25 prominent geographic features, and click to link to them. Coloring of the base map indicates relative elevations, based on data from the Mars Orbiter Laser Altimeter on NASA 's Mars Global Surveyor. Reds and pinks are higher elevation ( + 3 km to + 8 km ) ; yellow is 0 km ; greens and blues are lower elevation ( down to − 8 km ). Whites ( > + 12 km ) and browns ( > + 8 km ) are the highest elevations. Axes are latitude and longitude ; Poles are not shown. ( See also : Mars Rovers map ) ( view discuss ) See also Geography of Mars Geology of Mars List of mountains on Mars by height List of tallest mountains in the Solar System Tharsis plateau True polar wander on Mars Volcanism on Mars References ^ Jump up to : `` Olympus Mons ''. Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program. Jump up ^ Mars Orbiter Laser Altimeter : Experiment summary ^ Jump up to : Neil F. Comins -- Discovering the Essential Universe ( 2012 ). p. 148 Jump up ^ `` Olympus ''. Merriam - Webster Dictionary., `` Mons ''. Merriam - Webster Dictionary... Jump up ^ `` Olympus ''. Dictionary.com Unabridged. Random House. `` Mons ''. Dictionary.com Unabridged. Random House. ^ Jump up to : Plescia, J.B. ( 2004 ). `` Morphometric Properties of Martian Volcanoes ''. J. Geophys. Res. 109 : E03003. Bibcode : 2004JGRE... 109.3003 P. doi : 10.1029 / 2002JE002031. Jump up ^ Patrick Moore 1977, Guide to Mars, London ( UK ), Cutterworth Press, p. 96 Jump up ^ `` New names on Olympus Mons ''. USGS. Retrieved 2006 - 07 - 11. Jump up ^ Frankel, C.S. ( 2005 ). Worlds on Fire : Volcanoes on the Earth, the Moon, Mars, Venus and Io ; Cambridge University Press : Cambridge, UK, p. 160. ISBN 978 - 0 - 521 - 80393 - 9. Jump up ^ `` Olympus Mons '', NASA, retrieved 30 August 2010. Jump up ^ Mouginis - Mark, P.J. ; Harris, A.J.L. ; Rowland, S.K. ( 2007 ). Terrestrial Analogs to the Calderas of the Tharsis Volcanoes on Mars in The Geology of Mars : Evidence from Earth - Based Analogs, M. Chapman, Ed. ; Cambridge University Press : Cambridge, UK, p. 84 ^ Jump up to : Carr, Michael H. ( 11 January 2007 ). The Surface of Mars. Cambridge University Press. p. 51. ISBN 978 - 1 - 139 - 46124 - 5. ^ Jump up to : Lopes, R. ; Guest, J.E. ; Hiller, K. ; Neukum, G. 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Mars Recorder Archived August 27, 2009, at the Wayback Machine. Jump up ^ Public Access to Standard Temperature - Pressure Profiles Archived 2007 - 06 - 21 at the Wayback Machine. Standard Pressure Profiles measured by MGS Radio Science team at 27 km ( 17 mi ) range from approximately 30 to 50 Pa. Jump up ^ Late Martian Weather ! stanford.edu temperature / pressure profiles 1998 to 2005 Jump up ^ Kenneth Baillie & Alistair Simpson. `` High altitude barometric pressure ''. Apex ( Altitude Physiology Expeditions ). Jump up ^ Hartmann, W.K. A Traveler 's Guide to Mars : The Mysterious Landscapes of the Red Planet. Workman : New York, 2003, p. 300. Jump up ^ Richardson, J.W. et al. ( 2009 ). The Relationship between Lava Fans and Tubes on Olympus Mons in the Tharsis Region, Mars. 40th Lunar and Planetary Science Conference, Abstract # 1527. http://www.lpi.usra.edu/meetings/lpsc2009/pdf/1527.pdf. Jump up ^ Martel, Linda M.V. ( 2005 - 01 - 31 ). `` Recent Activity on Mars : Fire and Ice ''. Planetary Science Research Discoveries. Retrieved 2006 - 07 - 11. Jump up ^ Soderblom, L.A. ; Bell, J.F. ( 2008 ). Exploration of the Martian Surface : 1992 -- 2007 in The Martian Surface : Composition, Mineralogy, and Physical Properties, J. Bell, Ed. ; Cambridge University Press : Cambridge, UK, p. 15. Jump up ^ Mouginis - Mark, P.J. ( 1981 ). Late - stage Summit Activity of Martian Shield Volcanoes. Proc. 12th Lunar and Planetary Science Conference ; Houston : LPI, 12B, pp. 1431 -- 1447. Jump up ^ `` Olympus Mons -- the caldera in close - up ''. ESA. 2004 - 02 - 11. Retrieved 2006 - 07 - 11. Jump up ^ Mouginis - Mark, P.J. ; Harris, A.J.L. ; Rowland, S.K. ( 2007 ). Terrestrial Analogs to the Calderas of the Tharsis Volcanoes on Mars in The Geology of Mars : Evidence from Earth - Based Analogs, M. Chapman, Ed. ; Cambridge University Press : Cambridge, UK, p. 86 Jump up ^ Beddingfield, C.B. ; Burr, D.M. ( 2011 ). Formation and Evolution of Surface and Subsurface Structures within the Large Caldera of Olympus Mons, Mars. 42nd Lunar and Planetary Science Conference. LPI : Houston, TX, Abstract # 2386. http://www.lpi.usra.edu/meetings/lpsc2011/pdf/2386.pdf Jump up ^ Neukum, G. ; et al. ( 2004 ). `` Recent and Episodic Volcanic and Glacial Activity on Mars Revealed by the High Resolution Stereo Camera ''. Nature. 432 ( 7020 ) : 971 -- 979. Bibcode : 2004Natur. 432... 971N. doi : 10.1038 / nature03231. PMID 15616551. Jump up ^ Robbins, S.J. et al. ( 2010 ). Dating The Most Recent Episodes of Volcanic Activity From Mars 's Main Volcanic Calderae ( sic ). 41st Lunar and Planetary Science Conference, Abstract 2252. http://www.lpi.usra.edu/meetings/lpsc2010/pdf/2252.pdf. Jump up ^ Byrne, P.K. et al. ( 2009 ). An Overview of Volcano Flank Terraces on Mars. 40th Lunar and Planetary Science Conference. LPI : Houston, abstract # 2192. http://www.lpi.usra.edu/meetings/lpsc2009/pdf/2192.pdf. Jump up ^ Borgia, A ( 1994 ). `` Dynamic Basis of Volcanic Spreading ''. J. Geophys. Res. 99 ( B4 ) : 17791 -- 17804. Bibcode : 1994JGR... 9917791B. doi : 10.1029 / 94jb00578. ^ Jump up to : McGovern, P.J. ; Morgan, J.K. ( 2009 ). `` Volcanic Spreading and Lateral Variations in the Structure of Olympus Mons, Mars ''. Geology. 37 ( 2 ) : 139 -- 142. Bibcode : 2009Geo... 37... 139M. doi : 10.1130 / g25180a. 1. Jump up ^ Francis, P.W. ; Wadge, G. ( 1983 ). `` The Olympus Mons Aureole : Formation by Gravitational Spreading ''. J. Geophys. Res. 88 ( B10 ) : 8333 -- 8344. Bibcode : 1983JGR... 88.8333 F. doi : 10.1029 / jb088ib10p08333. Jump up ^ Bibring, Jean - Pierre ; et al. ( 2006 ). `` Global Mineralogical and Aqueous Mars History Derived from OMEGA / Mars Express Data ''. Science. 312 ( 5772 ) : 400 -- 404. Bibcode : 2006Sci... 312... 400B. doi : 10.1126 / science. 1122659. PMID 16627738. Jump up ^ McGovern, P.J. ( 2010 ). Olympus Mons : A Primary Target for Martian Biology. Astrobiology Science Conference, LPI, Abstract # 5633. http://www.lpi.usra.edu/meetings/abscicon2010/pdf/5633.pdf. Jump up ^ Moore 1977, Guide to Mars, p. 120 Jump up ^ Cattermole P. Mars : the Mystery Unfolds ; Oxford University Press : New York, 2001. External links Wikimedia Commons has media related to Olympus Mons. 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Question: what is the name of the highest mountain on mars
Answer: Olympus Mons