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- Scalloped_topography abstract "Scalloped topography is common in the mid-latitudes of Mars, between 45° and 60° north and south. It is particularly prominent in the region of Utopia Planitia, in the northern hemisphere, and in the region of Peneus and Amphitrites Paterae in the southern hemisphere. Such topography consists of shallow, rimless depressions with scalloped edges, commonly referred to as "scalloped depressions" or simply "scallops". Scalloped depressions can be isolated or clustered and sometimes seem to coalesce. A typical scalloped depression displays a gentle equator-facing slope and a steeper pole-facing scarp. This topographic asymmetry is probably due to differences in insolation. Scalloped depressions are believed to form from the removal of subsurface material, possibly interstitial ice, by sublimation (direct transition of a material from the solid to the gas phase with no intermediate liquid stage). This process may still be happening at present.A study published in Icarus, found that the landforms of scalloped topography can be made by the subsurface loss of water ice by sublimation under current Martian climate conditions over periods of tens of thousands of Mars years. Scalloped depressions are thought to begin with a small trigger like a small impact, local darkening, erosion, or cracks from thermal contraction. Cracks are common in ice-rich ground on the Earth. Their model predicts that these scalloped depression will develop when the ground has large amounts of pure ice, up to many tens of meters in depth. So, scalloped features can serve as markers for large deposits of pure ice. Ice in and around scalloped topography is not just in the pore spaces of the ground it is excess ice, probably 99% pure as was found by the Phoenix mission. Shallow Subsurface Radar (SHARAD), aboard the Mars Reconnaissance Orbiter can detect ice-rich layers only when thicker than 10-20 meters over wide areas; it has discovered ice in the region of scalloped topography.In Utopia Planitia, a series of curvilinear ridges parallel to the scarp are etched on the floor of large scalloped depressions, possibly representing different stages of scarp erosion. Recently, other researchers have advanced an idea that the ridges represent the tops of layers. Sometimes the surface around scalloped terrain or scalloped topography displays "patterned ground", characterized by a regular pattern of polygonal fractures. These patterns indicate that the surface has undergone stress, perhaps caused by subsidence, desiccation, or thermal contraction. Such patterns are common in periglacial areas on Earth. Scalloped terrains in Utopia Planitia display polygonal features of different sizes: small (about 5–10 m across) on the scarp, and larger (30–50 m across) on the surrounding terrains. These scale differences may indicate local difference in ground ice concentrations.".
- Scalloped_topography wikiPageID "23003925".
- Scalloped_topography wikiPageLength "7637".
- Scalloped_topography wikiPageOutDegree "26".
- Scalloped_topography wikiPageRevisionID "683800673".
- Scalloped_topography wikiPageWikiLink Casius_quadrangle.
- Scalloped_topography wikiPageWikiLink Category:Geology_of_Mars.
- Scalloped_topography wikiPageWikiLink Category:Surface_features_of_Mars.
- Scalloped_topography wikiPageWikiLink Diacria_quadrangle.
- Scalloped_topography wikiPageWikiLink Hellas_quadrangle.
- Scalloped_topography wikiPageWikiLink HiRISE.
- Scalloped_topography wikiPageWikiLink Insolation.
- Scalloped_topography wikiPageWikiLink Mad_Vallis.
- Scalloped_topography wikiPageWikiLink Mars_Reconnaissance_Orbiter.
- Scalloped_topography wikiPageWikiLink Mid-latitudes.
- Scalloped_topography wikiPageWikiLink Middle_latitudes.
- Scalloped_topography wikiPageWikiLink Milankovic_(Martian_crater).
- Scalloped_topography wikiPageWikiLink Noachis_quadrangle.
- Scalloped_topography wikiPageWikiLink Patterned_ground.
- Scalloped_topography wikiPageWikiLink Peneus_Patera.
- Scalloped_topography wikiPageWikiLink Periglacial.
- Scalloped_topography wikiPageWikiLink Periglaciation.
- Scalloped_topography wikiPageWikiLink Phoenix_(spacecraft).
- Scalloped_topography wikiPageWikiLink Phoenix_mission.
- Scalloped_topography wikiPageWikiLink SHARAD.
- Scalloped_topography wikiPageWikiLink Scalloped_topography.
- Scalloped_topography wikiPageWikiLink Solar_irradiance.
- Scalloped_topography wikiPageWikiLink Sublimation_(chemistry).
- Scalloped_topography wikiPageWikiLink Sublimation_(phase_transition).
- Scalloped_topography wikiPageWikiLink Utopia_Planitia.
- Scalloped_topography wikiPageWikiLinkText "Scalloped topography".
- Scalloped_topography wikiPageWikiLinkText "scallop".
- Scalloped_topography wikiPageWikiLinkText "scalloped topography".
- Scalloped_topography wikiPageWikiLinkText "scalloped".
- Scalloped_topography wikiPageWikiLinkText "scalloped-shaped depressions".
- Scalloped_topography hasPhotoCollection Scalloped_topography.
- Scalloped_topography wikiPageUsesTemplate Template:Reflist.
- Scalloped_topography subject Category:Geology_of_Mars.
- Scalloped_topography subject Category:Surface_features_of_Mars.
- Scalloped_topography type Feature.
- Scalloped_topography comment "Scalloped topography is common in the mid-latitudes of Mars, between 45° and 60° north and south. It is particularly prominent in the region of Utopia Planitia, in the northern hemisphere, and in the region of Peneus and Amphitrites Paterae in the southern hemisphere. Such topography consists of shallow, rimless depressions with scalloped edges, commonly referred to as "scalloped depressions" or simply "scallops".".
- Scalloped_topography label "Scalloped topography".
- Scalloped_topography sameAs m.064pj7c.
- Scalloped_topography sameAs Фестончастий_рельєф.
- Scalloped_topography sameAs Q7429792.
- Scalloped_topography sameAs Q7429792.
- Scalloped_topography wasDerivedFrom Scalloped_topography?oldid=683800673.
- Scalloped_topography isPrimaryTopicOf Scalloped_topography.