# Enipeus Vallis

> Mediated Wiki article. Canonical URL: https://mediated.wiki/source/Enipeus_Vallis
> Markdown URL: https://mediated.wiki/source/Enipeus_Vallis.md
> Source: https://en.wikipedia.org/wiki/Enipeus_Vallis
> Source revision: 1321266786
> License: Creative Commons Attribution-ShareAlike 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/)

Vallis on Mars

Enipeus Vallis Enipeus Vallis, as seen in THEMIS daytime IR mosaic. Feature type valley network[1] Location Arcadia quadrangle Coordinates 36°41′N 266°54′E / 36.68°N 266.9°E / 36.68; 266.9

**Enipeus Vallis** is a valley in the northern hemisphere of the planet [Mars](/source/Mars). It is centered at lat. 37°N, long. 267°E in the [Arcadia quadrangle](/source/Arcadia_quadrangle) (MC-3) between the large volcano [Alba Mons](/source/Alba_Mons) and the [Tempe Terra](/source/Tempe_Terra) plateau. The valley follows a gently [sinuous](/source/Sinuous), north–south path for a distance of about 357 km (222 mi).[2] It is likely an ancient [watercourse](/source/Watercourse) that formed during the early [Hesperian](/source/Hesperian) (or late [Noachian](/source/Noachian)) period,[3] around 3.7 billion years ago.[4]

The valley is named after a river in [Thessaly](/source/Thessaly), [Greece](/source/Greece). [Enipeus](/source/Enipeus_(mythology)) is also the name of a river god in [classical mythology](/source/Classical_mythology).[5] The [International Astronomical Union](/source/International_Astronomical_Union) (IAU) formally adopted the name Enipeus Vallis in 1991.[2] *Vallis* is the Latin word for valley.[6]

## General description

Enipeus Vallis is mapped as a [valley network](/source/Valley_networks_(Mars)).[1][7][8] Valley networks are branching systems of valleys on Mars that superficially resemble terrestrial river [drainage basins](/source/Drainage_basin). They are abundant in the equatorial and southern highlands of the planet but less common in the northern hemisphere.[9] Most valley networks are thought to have formed by flowing water, although the primary source of the water (melting ice, rainfall, springs) is still debated.[10]

Enipeus Vallis is a single trunk valley,[11] with no large tributaries. The valley is widest (about 10 km or 6.2 mi) at its southernmost reach near Lat. 33.6°N and rapidly tapers northward, maintaining a regular width of 3 to 5 km (1.9 to 3.1 mi) throughout most of its course.[12] Above lat. 39.7°N the valley opens up, and drainage features become poorly integrated and ill-defined. North of this area, a somewhat subdued valley segment continues to the northwest from 40.5°N to about 42.5°N (northwest of the crater Lowbury) where it is locally buried by impact crater ejecta and young ([Amazonian](/source/Amazonian_(Mars))-aged) plains material.[3] This northern valley segment gradually loses its identity amid the narrow [grabens](/source/Graben) of [Tantalus Fossae](/source/Tantalus_Fossae).

The elevation of the valley floor ranges from 885 m (2,904 ft) above [datum](/source/Datum_(geodesy)) ([Mars "sea" level](/source/Areoid)) in the south to 100 m (330 ft) or less in the north, where the northern segment of the valley begins to lose its definition. In cross-sectional profile, the valley is [U-shaped](/source/U-shaped_valley) to rectangular, with depths ranging from 20 to 50 m (66 to 164 ft).[13] In the south, Enipeus Vallis has [levee](/source/Levee)-like ridges along its edges that are up to 20 m (66 ft) high.[13] The levees are locally breached by lava flows from the surrounding plains.[3]

In places, inner channels are visible along the valley floor. At around 36°N, the channels form an [anastomosing](/source/Anastomosing) (braided) pattern. Near the middle section of the southern valley segment, the valley divides into several branches, which then rejoin to form diamond-shaped islands.[3] Faint longitudinal [striations](/source/Striation_(geology)) and streamlined erosional [bedforms](/source/Bedform) are common all along the floor of the valley. (See Photo Gallery.)

In [fluvial](/source/Fluvial) [geomorphology](/source/Geomorphology), a distinction is made between the terms [stream valley](/source/River_valley) and [stream channel](/source/Stream_channel). Stream valleys are wide, elongate depressions. The stream itself flows within the confines of a channel in the center of the valley. A stream valley usually contains many channels. Channels are always much narrower and shallower than the valley that contains them, and water in the stream channel never comes close to filling the entire valley.[14]

The distinction is important when discussing features of probable fluvial origin on Mars. Although Enipeus Vallis is described here as a valley, it has many features typical of a channel, including fluvial bedforms, streamlined features, a U-shaped profile,[15] and levee deposits, which are always associated with channels not valleys. Except for its small width and general [sinuosity](/source/Sinuosity), Enipeus Vallis has characteristics resembling the immense Martian [outflow channels](/source/Outflow_channels),[16] which are true channels formed by the catastrophic release of large volumes of water.[14] Fluvial landforms like Enipeus Vallis that show characteristics of both valley networks and outflow channels are relatively common on Mars ([Ma'adim Vallis](/source/Ma'adim_Vallis), for example).[10] and indicate that fluvial erosion on Mars has a distinctive genesis and evolution compared to Earth.[17]

## Regional geology

Enipeus Vallis is located at the western edge of the [Tempe Terra](/source/Tempe_Terra) plateau in the Tempe-Mareotis region.[3] The region lies on a broad [topographic](/source/Topography) shelf bounded by the higher elevations of Alba Mons to the west and Tempe Terra to the east.[18] The region slopes gently to the north with a gradient of 0.3° or less.[13] The area is characterized by abundant lava flows, low volcanic [shields](/source/Shield_volcano), and small domes that are part of the Tempe Volcanic Province, a northeastern extension of the [Tharsis Montes](/source/Tharsis_Montes) chain of volcanoes. Although spatially related to the large Tharsis volcanoes, volcanism in the Tempe Volcanic Province has a different eruptive style and has been likened to the [basaltic](/source/Basalt) plains volcanism seen in [Idaho](/source/Idaho)’s [Snake River Plain](/source/Snake_River_Plain).[19][20] This category of volcanic activity is intermediate between [flood (plateau) basalts](/source/Flood_basalt) and [Hawaiian volcanism](/source/Hawaiian_eruption).[21][22]

The region is transected by numerous northeast-trending [grabens](/source/Graben) that form parts of the [Tempe](/source/Tempe_Fossae), [Mareotis](/source/Mareotis_Fossae), and [Tantalus Fossae](/source/Tantalus_Fossae); these are fracture systems of varying ages that are oriented radially from the [Tharsis](/source/Tharsis) bulge. The region west of Enipeus Vallis is characterized by Hesperian-aged volcanic flows from [Alba Mons](/source/Alba_Mons). The area to the east consists of fractured and terraced highland plateaus of [Noachian](/source/Noachian) age.[3] At the end of the Noachian period, these highland materials underwent an episode of [fluvial](/source/Fluvial) erosion and resurfacing. Enipeus Vallis probably formed during this fluvial episode.[21]

## Photo gallery

		- Southern end of Enipeus Vallis is about 10 km wide and broadly U-shaped in profile. The western wall of the valley has a straight NE orientation similar to that of fractures in the Noachian plateau materials to the east. This suggests that the valley formed along pre-existing faults. ([THEMIS](/source/Thermal_Emission_Imaging_System) VIS image)

		- [Anastomosing](/source/Anastomosis) channels in Enipeus Vallis at 35.9°N, 267.0E, as seen in [HiRISE](/source/HiRISE) image.

		- Enipeus Vallis (right). Note inner channel, levee-like deposits, and streamlined bedforms. ([THEMIS](/source/Thermal_Emission_Imaging_System) VIS image)

		- Middle portion of Enipeus Vallis. The valley divides into several channels, forming large central island at 37.0°N, 267.2°E. Image is [THEMIS](/source/Thermal_Emission_Imaging_System) VIS mosaic.

## Notes

1. ^ [***a***](#cite_ref-Carr1_1-0) [***b***](#cite_ref-Carr1_1-1) Carr, M.H. (1995). The Martian Drainage System and the Origin of Valley Networks and Fretted Channels. *J. Geophys. Res.,* **100**(E4), p. 7491, Fig. 9a.

1. ^ [***a***](#cite_ref-GPN_2-0) [***b***](#cite_ref-GPN_2-1) USGS Gazetteer of Planetary Nomenclature. [https://planetarynames.wr.usgs.gov/Feature/1803](https://planetarynames.wr.usgs.gov/Feature/1803).

1. ^ [***a***](#cite_ref-Moore01_3-0) [***b***](#cite_ref-Moore01_3-1) [***c***](#cite_ref-Moore01_3-2) [***d***](#cite_ref-Moore01_3-3) [***e***](#cite_ref-Moore01_3-4) [***f***](#cite_ref-Moore01_3-5) Moore, H.J. (2001). Geologic Map of the Tempe-Mareotis Region of Mars. USGS Geologic Investigations Series I-2727. [https://geopubs.wr.usgs.gov/i-map/i2727/](https://geopubs.wr.usgs.gov/i-map/i2727/).

1. **[^](#cite_ref-4)** Hartmann, W.K. (2005). Martian Cratering 8: Isochron Refinement and the Chronology of Mars. *Icarus,* **174**, p. 317, Tbl. 3. [doi](/source/Doi_(identifier)):[10.1016/j.icarus.2004.11.023](https://doi.org/10.1016%2Fj.icarus.2004.11.023).

1. **[^](#cite_ref-5)** Simpson, D.P. (1968). *Cassell's New Latin Dictionary;* Funk & Wagnalls: New York, p. 215.

1. **[^](#cite_ref-6)** USGS Gazetteer of Planetary Nomenclature. Descriptor Terms. [https://planetarynames.wr.usgs.gov/DescriptorTerms](https://planetarynames.wr.usgs.gov/DescriptorTerms).

1. **[^](#cite_ref-7)** Hynek, B.M.; Beach, M.; Hoke, M.R.T. (2010). "Updated Global Map of Martian Valley Networks and Implications for Climate and Hydrologic Processes". *J. Geophys. Res.,* **115**, E09008, [doi](/source/Doi_(identifier)):[10.1029/2009JE003548](https://doi.org/10.1029%2F2009JE003548). Cited in Andrews‐Hanna, J. C.; Lewis, K.W. (2011). "Early Mars Hydrology: 2. Hydrological Evolution in the Noachian and Hesperian Epochs". *J. Geophys. Res.,* **116**, E02007, Fig. 1. [doi](/source/Doi_(identifier)):[10.1029/2010JE003709](https://doi.org/10.1029%2F2010JE003709).

1. **[^](#cite_ref-8)** Carr, M. H., (2002). "Elevations of Water-Worn Features on Mars: Implications for Circulation of Groundwater". *J. Geophys. Res.*, **107** (E12), p. 14–15, Fig. 3, [doi](/source/Doi_(identifier)):[10.1029/2002JE001845](https://doi.org/10.1029%2F2002JE001845).

1. **[^](#cite_ref-9)** Carr, M.H.; Clow, G.D. (1981). "Martian Channels and Valleys: Their Characteristics, Distribution, and Age". *Icarus,* **48**, p. 93.

1. ^ [***a***](#cite_ref-Carr06_10-0) [***b***](#cite_ref-Carr06_10-1) Carr, M.H. (2006). *The Surface of Mars*; Cambridge University Press: Cambridge, UK, p. 113. [ISBN](/source/ISBN_(identifier)) [978-0-521-87201-0](https://en.wikipedia.org/wiki/Special:BookSources/978-0-521-87201-0).

1. **[^](#cite_ref-11)** Boyce, J.M. (2008). *The Smithsonian Book of Mars;* Konecky & Konecky: Old Saybrook, CT, p. 163. [ISBN](/source/ISBN_(identifier)) [1-56852-714-4](https://en.wikipedia.org/wiki/Special:BookSources/1-56852-714-4).

1. **[^](#cite_ref-12)** JMARS distance tool.

1. ^ [***a***](#cite_ref-JMOLA_13-0) [***b***](#cite_ref-JMOLA_13-1) [***c***](#cite_ref-JMOLA_13-2) JMARS gridded [MOLA](/source/Mars_Orbital_Laser_Altimeter) elevation dataset.

1. ^ [***a***](#cite_ref-Carr96_14-0) [***b***](#cite_ref-Carr96_14-1) Carr, M.H. (1996). *Water on Mars;* Oxford, p. 47. [ISBN](/source/ISBN_(identifier)) [0-19-509938-9](https://en.wikipedia.org/wiki/Special:BookSources/0-19-509938-9).

1. **[^](#cite_ref-Baker92_15-0)** Baker, V.R.; Carr, M.H.; Gulick, V.C.; Williams, C.R.; Marley, M.S. (1992). "Channels and Valley Networks" in *Mars,* H.H. Kieffer et al. Eds.; University of Arizona Press: Tucson, 493–522.

1. **[^](#cite_ref-16)** Carr, M.H. (2006). *The Surface of Mars;* Cambridge University Press: Cambridge, UK, p. 122.

1. **[^](#cite_ref-17)** Head, J.W. (2007). "The Geology of Mars: New Insights and Outstanding Questions" in *The Geology of Mars: Evidence from Earth-Based Analogs,* M. Chapman, Ed.; Cambridge University Press: Cambridge: UK, p. 23. [ISBN](/source/ISBN_(identifier)) [978-0-521-83292-2](https://en.wikipedia.org/wiki/Special:BookSources/978-0-521-83292-2).

1. **[^](#cite_ref-18)** Frey, H.; Roark, J.; Sakimoto, S; McGovern, P. (1999) The Crustal Dichotomy Boundary West of Tempe Terra: Speculation on Where It Lies Beneath Alba Patera Based on MOLA Topography. 30th Lunar and Planetary Science Conference, Abstract #1798. [http://www.lpi.usra.edu/meetings/LPSC99/pdf/1798.pdf](http://www.lpi.usra.edu/meetings/LPSC99/pdf/1798.pdf).

1. **[^](#cite_ref-19)** Greeley, R. (1977) Basaltic "Plains" Volcanism, Volcanism of the Eastern Snake River Plain, Idaho. NASA Contract. Report, CR-154621, 23–43 cited in Greeley, R.; Spudis, P. (1981). Volcanism on Mars. *Rev. Geophys. Space Phys.,* **19**(1), 13–41.

1. **[^](#cite_ref-Plescia81_20-0)** Plescia, J.B. (1981). The Tempe Volcanic Province of Mars and Comparisons with the Snake River Plains of Idaho. *Icarus,* **45**, 586–601.

1. ^ [***a***](#cite_ref-Moore95_21-0) [***b***](#cite_ref-Moore95_21-1) Moore, H.J. (1995). Geology of the Tempe-Mareotis Region, Mars. 26th Lunar and Planetary Science Conference, Abstract #1497. [http://www.lpi.usra.edu/meetings/lpsc1995/pdf/1497.pdf](http://www.lpi.usra.edu/meetings/lpsc1995/pdf/1497.pdf).

1. **[^](#cite_ref-22)** Greeley, R. (1982). The Snake River Plain, Idaho: Representative of a New Category of Volcanism. *J. Geophys. Res.,* **87**(B4), 2705-2712, [http://www.agu.org/pubs/crossref/1982/JB087iB04p02705.shtml](http://www.agu.org/pubs/crossref/1982/JB087iB04p02705.shtml) [Archived](https://web.archive.org/web/20121003052151/http://www.agu.org/pubs/crossref/1982/JB087iB04p02705.shtml) 2012-10-03 at the [Wayback Machine](/source/Wayback_Machine).

## References

- JMARS. [http://jmars.asu.edu/](http://jmars.asu.edu/). (See Christensen, P.; Gorelick, N.; Anwar, S.; Dickenshied, S.; Edwards, C.; Engle, E. (2007) "New Insights About Mars From the Creation and Analysis of Mars Global Datasets;" American Geophysical Union, Fall Meeting, abstract #P11E-01. [http://adsabs.harvard.edu/abs/2007AGUFM.P11E..01C](http://adsabs.harvard.edu/abs/2007AGUFM.P11E..01C).)

## See also

- [Geology of Mars](/source/Geology_of_Mars)

- [HiRISE](/source/HiRISE)

- [Outflow channels](/source/Outflow_channels)

- [Vallis (planetary geology)](/source/Vallis_(planetary_geology))

- [Valley network (Mars)](/source/Valley_network_(Mars))

- [Water on Mars](/source/Water_on_Mars)

v t e Geography and geology of Mars Cartography Regions Abalos Undae Aspledon Undae Arabia Terra Cerberus Cydonia Eridania Lake Hyperboreae Undae Ogygis Undae Olympia Undae Planum Australe Planum Boreum Quadrangles Sinus Meridiani Siton Undae Tempe Terra Terra Cimmeria Terra Sabaea Tharsis Vastitas Borealis Quadrangles Aeolis Amazonis Amenthes Arabia Arcadia Argyre Casius Cebrenia Coprates Diacria Elysium Eridania Hellas Iapygia Ismenius Lacus Lunae Palus Mare Acidalium Mare Australe (South Pole) Mare Boreum (North Pole) Mare Tyrrhenum Margaritifer Sinus Memnonia Noachis Oxia Palus Phaethontis Phoenicis Lacus Sinus Sabaeus Syrtis Major Tharsis Thaumasia Geology Surface features Brain terrain Carbonates Chaos terrain Color Composition Concentric crater fill Dark slope streak Dichotomy Dune fields Hagal Nili Patera Fretted terrain Geysers Glaciers Groundwater Gullies Inverted relief Lakes Lava tubes Lineated valley fill (LVF) Lobate debris apron North Polar Basin Ocean hypothesis Ore resources Outflow channels Polar caps Ring mold craters Rootless cones Scalloped topography Seasonal flows Soil Spherules Surface Swiss cheese features Terrain softening Tholus Upper plains unit Valley networks Water discovery chronology Yardangs History Amazonian Hesperian Noachian Volcanology Observation history Canals (list) Classical albedo features Rocks observed Curiosity rover Bathurst Inlet Coronation Goulburn Hottah Jake Matijevic Link Rocknest Rocknest 3 Tintina Opportunity rover Bounce El Capitan Last Chance Sojourner rover Barnacle Bill Yogi Spirit rover Adirondack Home Plate Mimi Pot of Gold Viking Big Joe Other Face Monolith Meteorites found on Mars Block Island Heat Shield Mackinac Island Meridiani Planum Oileán Ruaidh Shelter Island Martian meteorites found on Earth Balsaltic Breccia Chassignites Nakhlites Shergottites Other List Topography Mountains, volcanoes (list by height) Acidalia Colles Alba Mons Anseris Mons Apollinaris Mons Ariadnes Colles Astapus Colles Ausonia Montes Avernus Colles Biblis Tholus Centauri Montes Charitum Montes Echus Montes Elysium Elysium Mons Albor Tholus Hecates Tholus Erebus Montes Galaxius Mons Hadriacus Mons Hellas Montes Jovis Tholus Libya Montes Mount Sharp Nereidum Montes Olympus Mons Phlegra Montes Syrtis Major Planum Tartarus Colles Tartarus Montes Tharsis Montes Ascraeus Pavonis Arsia Tharsis Tholus Tyrrhenus Mons Ulysses Tholus Uranius group Uranius Mons Ceraunius Tholus Uranius Tholus Plains, plateaus Acidalia Planitia Aeolis Palus Amazonis Planitia Arcadia Planitia Argentea Planum Argyre Planitia Chryse Planitia Daedalia Planum Elysium Planitia Eridania Planitia Hellas Planitia Hesperia Planum Icaria Planum Isidis Planitia Lunae Planum Meridiani Planum Oxia Planum Planum Australe Planum Boreum Syria Planum Syrtis Major Planum Utopia Planitia Eden Patera Orcus Patera Peneus Patera Pityusa Patera Siloe Patera Canyons, valleys Aram Chaos Arsia Chasmata Aromatum Chaos Atlantis Chaos Aureum Chaos Candor Chasma Chasma Boreale Coprates Chasma Echus Chasma Eos Chaos Eos Chasma Galaxias Chaos Ganges Chasma Gorgonum Chaos Hebes Chasma Hydaspis Chaos Hydraotes Chaos Iani Chaos Ister Chaos Ius Chasma Juventae Chasma Melas Chasma Ophir Chasma Tithonium Chasma List of valles Apsus Ares Arnus Asopus Athabasca Auqakuh Bahram Buvinda Dao Enipeus Frento Granicus Green Valley Harmakhis Hebrus Her Desher Hrad Huo Hsing Hypanis Iberus Indus Ituxi Kasei Labou Ladon Lethe Licus Louros Maʼadim Mad Maja Mamers Mangala Marineris Labes Marte Maumee Mawrth Minio Naktong Nanedi Niger Nirgal Padus Paraná Patapsco Peace Rahway Ravi Reull Sabis Sabrina Samara Scamander Shalbatana Simud Stura Tader Tinia Tinjar Tiu Tyras Uzboi ULM Vedra Verde Warrego Fossae, mensae, rupes, labyrinthi Amenthes Fossae Ceraunius Fossae Cerberus Fossae Coloe Fossae Cyane Fossae Elysium Fossae Hephaestus Fossae Icaria Fossae Labeatis Fossae Mangala Fossa Mareotis Fossae Medusae Fossae Memnonia Fossae Nili Fossae Olympica Fossae Oti Fossae Sirenum Fossae Tantalus Fossae Tempe Fossae Tithonium Fossae Tractus Fossae Ulysses Fossae Aeolis Mensae Ausonia Mensa Capri Mensa Cydonia Mensae Deuteronilus Mensae Ganges Mensa Nilosyrtis Mensae Protonilus Mensae Sacra Mensa Claritas Rupes Nilokeras Scopulus Olympus Rupes Rupes Tenuis Angustus Labyrinthus Noctis Labyrinthus Catenae, craters Artynia Catena Tithoniae Catenae Tractus Catena Adams Agassiz Airy Airy-0 Aniak Antoniadi Arandas Argo Arkhangelsky Arrhenius Asimov Bacolor Bakhuysen Baldet Baltisk Bamberg Barabashov Barnard Beagle Becquerel Beer Belz Bernard Bianchini Boeddicker Bok Bond Bonestell Bonneville Brashear Briault Burroughs Burton Campbell Canso Cassini Caxias Cerulli Chafe Chapais Chincoteague Chryse Alien Clark Coblentz Columbus Copernicus Corby Crewe Crivitz Crommelin Cruls Curie Da Vinci Danielson Darwin Davies Dawes Dejnev Denning Dilly Dinorwic Douglass Dromore Du Martheray Eagle (Acidalia Planitia) Eagle (Meridiani Planum) Eberswalde Eddie Ejriksson Emma Dean Endeavour Matijevic Hill Endurance Erebus Escalante Eudoxus Fenagh Fesenkov Firsoff Flammarion Flaugergues Focas Fontana Fournier Fram Freedom Galdakao Gale Galle Garni Gasa Gilbert Gill Gledhill Gold Graff Green Grindavik Gusev Apollo 1 Hills Chaffee Grissom White Columbia Hills Husband McCool Sleepy Hollow Hadley Haldane Hale Halley Hargraves Hartwig Heaviside Heimdal Heinlein Helmholtz Henry Herschel Hipparchus Holden Holmes Hooke Huggins Hussey Hutton Huxley Huygens Iazu Ibragimov Inuvik Janssen Jarry-Desloges Jeans Jezero Jezža Joly Jones Kaiser Keeler Kepler Kinkora Kipini Knobel Koga Korolev Kufra Kuiper Kunowsky Lambert Lamont Lampland Lassell Lau Le Verrier Li Fan Liais Lipik Liu Hsin Llanesco Lockyer Lod Lohse Lomonosov Louth Lowell Lyell Lyot Mädler Magelhaens Maggini Main Mandora Maraldi Mariner Marth Martz Masursky Maunder McLaughlin McMurdo Mellish Mendel Mie Milankovic Millochau Mitchel Miyamoto Mohawk Mojave Molesworth Montevallo Moreux Müller Nansen Nereus Newton Nhill Nicholson Niesten Nipigon Onon Orson Welles Oudemans Palana Pangboche Pasteur Penticton Perepelkin Peridier Persbo Pettit Phillips Pickering Playfair Pollack Poona Porter Porth Priestley Proctor Ptolemaeus Puńsk Quenisset Rabe Radau Rahe Rayleigh Redi Renaudot Reuyl Reynolds Richardson Ritchey Robert Sharp Roddenberry Ross Rossby Rudaux Russell Rutherford Sagan Saheki Santa Maria Schaeberle Schiaparelli Schmidt Secchi Semeykin Sharonov Sibu Sinton Sitka Sklodowska Slipher Smith South Spallanzani Srīpur Steno Stokes Stoney Suess Suzhi Tarsus Taytay Teisserenc de Bort Terby Thila Thira Tikhonravov Tikhov Timbuktu Tombaugh Tooting Trouvelot Troy Trud Trumpler Tugaske Tycho Brahe Tyndall Udzha Vernal Very Victoria Cape Verde Vinogradov Vinogradsky Virrat Vishniac Vogel Von Kármán Vostok Wallace Wegener Weinbaum Wells Williams Winslow Wirtz Wislicenus Wright Yuty Zumba Zunil

[Portal](https://en.wikipedia.org/wiki/Wikipedia:Contents/Portals):
- [Solar System](https://en.wikipedia.org/wiki/Portal:Solar_System)

---
Adapted from the Wikipedia article [Enipeus Vallis](https://en.wikipedia.org/wiki/Enipeus_Vallis) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Enipeus_Vallis?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.