Green (Martian crater)

Short description: Crater on Mars

Green

Gullies in Green crater, as seen by HiRISE.

Planet| Mars
Coordinates|  [ ⚑ ] : 52°42′S 8°24′W﻿ / ﻿52.7°S 8.4°W﻿ / -52.7; -8.4
Diameter| 184 km

Green is an impact crater in the Argyre quadrangle of Mars. It is named after Nathan E. Green, a British astronomer (1823-1899).[1]

## Contents

* 1 Description
* 2 Dunes
* 3 See also
* 4 References

## Description

Debris flows have been observed on some of the dunes in this crater. Some researchers believe that they may be caused by liquid water. Liquid water could be stable for short periods of time in the summer in the southern hemisphere of Mars. These gully-like debris flows may be due to small amounts of ice melting.[2]

* East side of Green crater, as seen by CTX camera (on MRO).

* Green crater, as seen by CTX camera. Dark dots are dunes.

* Dunes in Green crater, as seen by CTX camera. This is an enlargement of the previous image. Thin dark lines are dust devil tracks. The crater on the right is within Green crater. Some old glaciers are visible as arc-shaped ridges. An arrow points to one of the glaciers.

* Close-up of gullies in Green crater, as seen by HiRISE.

## Dunes

Barchan dunes are present in Green crater and visible in pictures below. When there are perfect conditions for producing sand dunes, steady wind in one direction and just enough sand, a barchan sand dune forms. Barchans have a gentle slope on the wind side and a much steeper slope on the lee side where horns or a notch often forms.[3]

## See also

* List of craters on Mars
* Gullies on Mars

## References

1. ↑ "Gazetteer of Planetary Nomenclature | Green". International Astronomical Union. http://planetarynames.wr.usgs.gov/Feature/2244.
2. ↑ Reiss, D, R. Jaumann. 2003. Recent debris flows on Mars: Seasonal observations of the Russell Crater dune field. Geophysical Research Letters: 30, 1321.
3. ↑ Pye, Kenneth; Haim Tsoar (2008). Aeolian Sand and Sand Dunes. Springer. pp. 138. ISBN 9783540859109. https://archive.org/details/aeoliansandsandd00pyek.

* v
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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
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* Lunae Palus
* Mare Acidalium
* Mare Australe (South Pole)
* Mare Boreum (North Pole)
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* Memnonia
* Noachis
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* 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
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* Gullies
* Inverted relief
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* Polar caps
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* Scalloped topography
* Seasonal flows
* Soil
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* Surface
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* Terrain softening
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* Water
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|

History|

* Amazonian
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* Volcanology
* Observation history
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* Classical albedo features

Rocks observed|

* Curiosity rover
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* Martian meteorites found on Earth
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* List

Topography

| Mountains and
volcanoes

(list by height)

* Acidalia Colles
* Alba Mons
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* Syrtis Major Planum
* Tartarus Colles
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* Ascraeus
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* 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
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* Hellas Planitia
* Hesperia Planum
* Icaria Planum
* Isidis Planitia
* Lunae Planum
* Meridiani Planum
* Oxia Planum
* Planum Australe
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* Syria Planum
* Syrtis Major Planum
* Utopia Planitia
* Eden Patera
* Orcus Patera
* Peneus Patera
* Pityusa Patera

Canyons and
valleys|

* Aram Chaos
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* Atlantis Chaos
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* Candor Chasma
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* Eos Chasma
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* Ophir Chasma
* Tithonium Chasma

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Fossae, mensae
rupes and labyrinthi|

* Amenthes Fossae
* Ceraunius Fossae
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* Medusae Fossae
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* 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
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* Tractus Catena
* Adams
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* Airy
* Airy-0
* Aniak
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* Cassini
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* Matijevic Hill
* Endurance
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* Fournier
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* Green
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* Main
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Original source: https://en.wikipedia.org/wiki/Green (Martian crater). Read more

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