Henry (Martian crater)

Short description: Martian crater

Henry

Location of Henry crater

Planet| Mars
Region| Arabia quadrangle
Coordinates|  [ ⚑ ] : 10°54′N 23°18′E﻿ / ﻿10.9°N 23.3°E﻿ / 10.9; 23.3
Diameter| 171 km

Henry is a large crater in the Arabia quadrangle of Mars. It is 171 kilometres (106 mi) in diameter and was named after the brothers Paul Henry and Prosper Henry, both of whom were French telescope makers and astronomers.[1]

Arago crater is to the east of Henry, Barth crater is to the southeast, and Pasteur crater is to the north.

## Layers

Henry crater has a large mound in its center that shows layers in certain parts.[2] The layers can be a few meters thick or tens of meters thick. Recent research on these layers by scientists at California Institute of Technology (Caltech) suggest that ancient climate change on Mars caused by regular variation in the planet's tilt, or obliquity may have caused the patterns in the layers. On Earth, similar changes (astronomical forcing) of climate results in ice-age cycles.

In a recent study of layers in craters in western Arabia Terra much was learned about the layers. Each layer may average under 4 meters in one crater, but 20 meters in another. Although the craters in this study are just outside the boundary for the Arabia quadrangle the findings would probably apply to the Arabia quadrangle as well. The pattern of layers within layers measured in Becquerel crater, suggests that each layer was formed over a period of about 100,000 years. Moreover, every 10 layers were bundled together into larger units. The 10-layer pattern is repeated at least 10 times. So every 10-layer pattern took one-million-year years to form.

It is believed that the regular pattern of layers in Arabia Terra is connected to the regular way in which the rotational axis of Mars changes. The tilt of the Earth's axis changes by only a little more than 2 degrees. In contrast Mars's tilt varies by tens of degrees. When the tilt (or obliquity) is low, the poles are the coldest places on the planet, while the sun is located near the equator all the time. This could cause gases in the atmosphere, like water and carbon dioxide, to migrate poleward, where they'd be locked up as ice. When the obliquity is higher, the poles receive more sunlight, causing those materials to migrate away. When carbon dioxide moves from the poles, the atmospheric pressure increases, maybe causing a difference in the ability of winds to transport and deposit sand. Also, with more water in the atmosphere sand grains may stick and cement together to form layers. This study was done using stereo topographic maps obtained by processing data from the high-resolution camera onboard NASA's Mars Reconnaissance Orbiter.[3]

Another group of researchers proposed groundwater with dissolved minerals came to the surface in craters, and helped to form layers by adding minerals (especially sulfate) and cementing sediments. This hypothesis is supported by a groundwater model and by sulfates discovered in a wide area.[4][5] At first, by examining surface materials with Opportunity Rover, scientists discovered that groundwater had repeatedly risen and deposited sulfates.[6][7][8][9][10] Later studies with instruments on board the Mars Reconnaissance Orbiter showed that the same kinds of materials exist in a large area that included Arabia.[11] In this model, the layers in the mound of Henry would be caused partly by sediments moving into the crater and partly by minerals rising up with groundwater and being deposited.

* Oblique view from Viking Orbiter 1 of Henry crater (lower left), Barth crater (lower right), and Arago crater (upper right)

* Henry crater mound, as seen by HiRISE

* Northeastern Henry crater showning layers at lower left and linear hills called yardangs, sculpted by wind

* MOLA map, showing Henry crater and other nearby craters. Colors indicate elevations.

## See also

* List of craters on Mars

## References

1. ↑ "Henry". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.
2. ↑ Grotzinger, J. and R. Milliken (eds.) 2012. Sedimentary Geology of Mars. SEPM
3. ↑ http://www.spaceref.com:80/news/viewpr.html.pid=27101[yes|permanent dead link|dead link}}]
4. ↑ Andrews‐Hanna, J. C., R. J. Phillips, and M. T. Zuber (2007), Meridiani Planum and the global hydrology of Mars, Nature, 446, 163–166, doi:10.1038/nature05594.
5. ↑ Andrews‐Hanna, J. C., M. T. Zuber, R. E. Arvidson, and S. M. Wiseman (2010), Early Mars hydrology: Meridiani playa deposits and the sedimentary record of Arabia Terra, J. Geophys. Res., 115, E06002, doi:10.1029/2009JE003485.
6. ↑ "Opportunity Rover Finds Strong Evidence Meridiani Planum Was Wet". http://marsrovers.jpl.nasa.gov/newsroom/pressreleases/20040302a.html.
7. ↑ Grotzinger, J. P., et al. (2005), Stratigraphy and sedimentology of a dry to wet eolian depositional system, Burns formation, Meridiani Planum, Mars, Earth Planet. Sci. Lett., 240, 11–72, doi:10.1016/j.epsl.2005.09.039
8. ↑ McLennan, S. M., et al. (2005), Provenance and diagenesis of the evaporitebearing Burns formation, Meridiani Planum, Mars, Earth Planet. Sci. Lett., 240, 95–121, doi:10.1016/j.epsl.2005.09.041
9. ↑ Squyres, S. W., and A. H. Knoll (2005), Sedimentary rocks at Meridiani Planum: Origin, diagenesis, and implications for life on Mars, Earth Planet. Sci. Lett., 240, 1–10, doi:10.1016/j.epsl.2005.09.038.
10. ↑ Squyres, S. W., et al. (2006), Two years at Meridiani Planum: Results from the Opportunity rover, Science, 313, 1403–1407, doi:10.1126/science.
11. ↑ M. Wiseman, J. C. Andrews-Hanna, R. E. Arvidson, J. F. Mustard, K. J. Zabrusky DISTRIBUTION OF HYDRATED SULFATES ACROSS ARABIA TERRA USING CRISM DATA: IMPLICATIONS FOR MARTIAN HYDROLOGY. 42nd Lunar and Planetary Science Conference (2011) 2133.pdf

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Geography of Mars 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
* 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 and
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 and
plateaus|

* Acidalia Planitia
* Aeolis Palus
* Amazonis Planitia
* Arcadia Planitia
* 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

Canyons and
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
* Ma'adam
* 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 and 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
* Olympus Rupes
* Rupes Tenuis
* Angustus Labyrinthus
* Noctis Labyrinthus

Catenae and
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
* Eberswalde
* Eddie
* Ejriksson
* Emma Dean
* Endeavour
* Matijevic Hill
* Endurance
* Erebus
* Escalante
* Eudoxus
* Fenagh
* Fesenkov
* Firsoff
* Flammarion
* Flaugergues
* Focas
* Fontana
* Fournier
* Fram
* 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
* 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
* 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
* Wallace
* Wegener
* Weinbaum
* Wells
* Williams
* Winslow
* Wirtz
* Wislicenus
* Wright
* Yuty
* Zumba
* Zunil

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