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- Wirtz_(crater) abstract "Wirtz Crater is a crater in Argyre quadrangle of Mars at 48.6° south latitude and 26° west longitude, It is 129 km in diameter and was named after Carl Wilhelm Wirtz, a German astronomer (1886–1956).\t\tMartian gullies are small, incised networks of narrow channels and their associated downslope sediment deposits, found on the planet of Mars. They are named for their resemblance to terrestrial gullies. First discovered on images from Mars Global Surveyor, they occur on steep slopes, especially on the walls of craters. Usually, each gully has a dendritic alcove at its head, a fan-shaped apron at its base, and a single thread of incised channel linking the two, giving the whole gully an hourglass shape. They are believed to be relatively young because they have few, if any craters. A subclass of gullies is also found cut into the faces of sand dunes which themselves considered to be quite young. On the basis of their form, aspects, positions, and location amongst and apparent interaction with features thought to be rich in water ice, many researchers believed that the processes carving the gullies involve liquid water. However, this remains a topic of active research. As soon as gullies were discovered, researchers began to image many gullies over and over, looking for possible changes. By 2006, some changes were found. Later, with further analysis it was determined that the changes could have occurred by dry granular flows rather than being driven by flowing water. With continued observations many more changes were found in Gasa Crater and others.With more repeated observations, more and more changes have been found; since the changes occur in the winter and spring, experts are tending to believe that gullies were formed from dry ice. Before-and-after images demonstrated the timing of this activity coincided with seasonal carbon-dioxide frost and temperatures that would not have allowed for liquid water. When dry ice frost changes to a gas, it may lubricate dry material to flow especially on steep slopes. In some years frost, perhaps as thick as 1 meter,".
- Wirtz_(crater) diameter "129000.0".
- Wirtz_(crater) location Mars.
- Wirtz_(crater) thumbnail Wirtz_Crater_dunes_-_hires.jpg?width=300.
- Wirtz_(crater) wikiPageExternalLink zoom-20080117718272a.
- Wirtz_(crater) wikiPageID "21960329".
- Wirtz_(crater) wikiPageLength "4729".
- Wirtz_(crater) wikiPageOutDegree "21".
- Wirtz_(crater) wikiPageRevisionID "686037624".
- Wirtz_(crater) wikiPageWikiLink Alluvial_fan.
- Wirtz_(crater) wikiPageWikiLink Argyre_quadrangle.
- Wirtz_(crater) wikiPageWikiLink Carl_Wilhelm_Wirtz.
- Wirtz_(crater) wikiPageWikiLink Category:Argyre_quadrangle.
- Wirtz_(crater) wikiPageWikiLink Category:Impact_craters_on_Mars.
- Wirtz_(crater) wikiPageWikiLink Climate_of_Mars.
- Wirtz_(crater) wikiPageWikiLink Drainage_system_(geomorphology).
- Wirtz_(crater) wikiPageWikiLink Glacier.
- Wirtz_(crater) wikiPageWikiLink Glaciers_on_Mars.
- Wirtz_(crater) wikiPageWikiLink Gully.
- Wirtz_(crater) wikiPageWikiLink HiRISE.
- Wirtz_(crater) wikiPageWikiLink Impact_crater.
- Wirtz_(crater) wikiPageWikiLink List_of_craters_on_Mars.
- Wirtz_(crater) wikiPageWikiLink Mars.
- Wirtz_(crater) wikiPageWikiLink Mars_Global_Surveyor.
- Wirtz_(crater) wikiPageWikiLink Mars_Reconnaissance_Orbiter.
- Wirtz_(crater) wikiPageWikiLink Planetary_nomenclature.
- Wirtz_(crater) wikiPageWikiLink Sediment.
- Wirtz_(crater) wikiPageWikiLink Water_on_Mars.
- Wirtz_(crater) wikiPageWikiLink File:Wirtz_Crater_dunes_-_hires.jpg.
- Wirtz_(crater) wikiPageWikiLinkText "Wirtz (crater)".
- Wirtz_(crater) wikiPageWikiLinkText "Wirtz".
- Wirtz_(crater) caption "Wirtz Crater Dunes with ripples and frost, as seen by HiRISE.".
- Wirtz_(crater) diameter "129.0".
- Wirtz_(crater) eOrW "W".
- Wirtz_(crater) eponym "Carl Wilhelm Wirtz, a German astronomer".
- Wirtz_(crater) latitude "48.6".
- Wirtz_(crater) longitude "26".
- Wirtz_(crater) nOrS "S".
- Wirtz_(crater) name "Wirtz Crater".
- Wirtz_(crater) wikiPageUsesTemplate Template:Cmn.
- Wirtz_(crater) wikiPageUsesTemplate Template:Mars.
- Wirtz_(crater) wikiPageUsesTemplate Template:MarsGeo-Crater.
- Wirtz_(crater) wikiPageUsesTemplate Template:Portal_bar.
- Wirtz_(crater) wikiPageUsesTemplate Template:Reflist.
- Wirtz_(crater) subject Category:Argyre_quadrangle.
- Wirtz_(crater) subject Category:Impact_craters_on_Mars.
- Wirtz_(crater) hypernym Crater.
- Wirtz_(crater) type Crater.
- Wirtz_(crater) type NaturalPlace.
- Wirtz_(crater) type Place.
- Wirtz_(crater) type Feature.
- Wirtz_(crater) type Location.
- Wirtz_(crater) type Place.
- Wirtz_(crater) type Thing.
- Wirtz_(crater) comment "Wirtz Crater is a crater in Argyre quadrangle of Mars at 48.6° south latitude and 26° west longitude, It is 129 km in diameter and was named after Carl Wilhelm Wirtz, a German astronomer (1886–1956).\t\tMartian gullies are small, incised networks of narrow channels and their associated downslope sediment deposits, found on the planet of Mars. They are named for their resemblance to terrestrial gullies.".
- Wirtz_(crater) label "Wirtz (crater)".
- Wirtz_(crater) sameAs Q8027043.
- Wirtz_(crater) sameAs Wirtz_(cratera).
- Wirtz_(crater) sameAs m.05pc287.
- Wirtz_(crater) sameAs Q8027043.
- Wirtz_(crater) wasDerivedFrom Wirtz_(crater)?oldid=686037624.
- Wirtz_(crater) depiction Wirtz_Crater_dunes_-_hires.jpg.
- Wirtz_(crater) isPrimaryTopicOf Wirtz_(crater).
- Wirtz_(crater) name "Wirtz Crater".