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- Q10348394 subject Q8508225.
- Q10348394 subject Q8543130.
- Q10348394 abstract "REDIRECT Template:Infobox Mars craterPenticton Crater is an impact crater in the Hellas quadrangle of Mars, located at 38.35° south latitude and 263.35° west longitude. It is 8 km in diameter and was named after a Town in British Columbia, Canada, nearby the little town of Okanagan Falls where is located the Dominion Radio Astrophysical Observatory. Images with HiRISE show gullies which were once thought to be caused by flowing water.Penticton is famous with Mars geologists because evidence for recent flowing liquid was found there. The Mars Reconnaissance Orbiter discovered changes on the wall of Penticton Crater between 1999 and 2004. One interpretation of the changes was that they were caused by water flowing on the surface. A further analysis, published about a year later, revealed that the deposit could have been caused by gravity moving material downslope. The slope where the deposit was sighted was close to the stability limits of dry, unconsolidated materials.Martian 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, location 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,".
- Q10348394 diameter "8000.0".
- Q10348394 location Q111.
- Q10348394 wikiPageWikiLink Q1036092.
- Q10348394 wikiPageWikiLink Q111.
- Q10348394 wikiPageWikiLink Q1361400.
- Q10348394 wikiPageWikiLink Q1463003.
- Q10348394 wikiPageWikiLink Q180184.
- Q10348394 wikiPageWikiLink Q183160.
- Q10348394 wikiPageWikiLink Q1985733.
- Q10348394 wikiPageWikiLink Q206300.
- Q10348394 wikiPageWikiLink Q2587227.
- Q10348394 wikiPageWikiLink Q285451.
- Q10348394 wikiPageWikiLink Q3054539.
- Q10348394 wikiPageWikiLink Q465088.
- Q10348394 wikiPageWikiLink Q497546.
- Q10348394 wikiPageWikiLink Q55818.
- Q10348394 wikiPageWikiLink Q8508225.
- Q10348394 wikiPageWikiLink Q8543130.
- Q10348394 wikiPageWikiLink Q935519.
- Q10348394 name "Penticton".
- Q10348394 type Place.
- Q10348394 type Crater.
- Q10348394 type Location.
- Q10348394 type NaturalPlace.
- Q10348394 type Place.
- Q10348394 type Thing.
- Q10348394 comment "REDIRECT Template:Infobox Mars craterPenticton Crater is an impact crater in the Hellas quadrangle of Mars, located at 38.35° south latitude and 263.35° west longitude. It is 8 km in diameter and was named after a Town in British Columbia, Canada, nearby the little town of Okanagan Falls where is located the Dominion Radio Astrophysical Observatory.".
- Q10348394 label "Penticton (crater)".
- Q10348394 name "Penticton".