| Risultati della ricerca nelle immagini - "Inverted" |
Aeolian_Features-Inverted_Channels-EP-MO-20090323a.jpgInverted Channels in Aeolis Planum (Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)55 visiteCaption NASA:"This VIS image shows a portion of the Eastern side of Aeolis Planum.
The Region has been extensively eroded by the wind. Relics of an earlier surface are located in the central part of the image, in the form of Inverted Channels.
This meaning that the material which filled in the Channels is more resistant to the wind than the surrounding materials".
Coord.: 3,0° South Lat. and 149,7° East Long.MareKromium
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Aeolian_Features-Inverted_Channels-ER-MO.jpgInverted Topography (Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)55 visiteCaption NASA:"The system of sinuous ridges seen at the top of the image is the remnants of a channel system. In this case the channel has been filled by a material more resistant to erosion than the surroundings.
As the surround material was eroded away the resistant channel fill was left behind, forming a ridge where the channel had once been. This reversal of topography - from a channel to a ridge - is termed Inversion or Inverted Topography".MareKromium
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Channels-Inverted_Channels_in_Arabia_Terra-PIA03643-00.jpgInverted channels of Arabia Terra (1 - Original NASA/MGS/MSSS b/w Frame)54 visiteOriginal caption:"This MGS-MOC image shows a somewhat sinuous, nearly flat-topped Ridge, located in Eastern Arabia Terra. The ridgetop was once the Floor of a Valley, perhaps carved by running water. The Valley Floor, or material that covered the Floor, was more resistant to erosion than the surrounding rock into which the Valley was cut. Thus, over time, the Valley disappeared and its Floor was left standing high as a Ridge. Inverted Valleys are common on Mars, but they also occur on Earth".
Location near: 10,8° North Lat. and 313,2° West Long.
Image width: width: ~3 Km (~1,9 mi)
Illumination from: lower left
Season: Northern Winter
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Channels-Inverted_Channels_in_Arabia_Terra-PIA03643-01.jpgInverted channels of Arabia Terra (1 - Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)151 visiteOriginal caption:"This MGS-MOC image shows a somewhat sinuous, nearly flat-topped Ridge, located in Eastern Arabia Terra. The ridgetop was once the Floor of a Valley, perhaps carved by running water. The Valley Floor, or material that covered the Floor, was more resistant to erosion than the surrounding rock into which the Valley was cut. Thus, over time, the Valley disappeared and its Floor was left standing high as a Ridge. Inverted Valleys are common on Mars, but they also occur on Earth".
Location near: 10,8° North Lat. and 313,2° West Long.
Image width: width: ~3 Km (~1,9 mi)
Illumination from: lower left
Season: Northern WinterMareKromium
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Channels-Inverted_Channels_in_Arabia_Terra-PIA03643-02.jpgInverted channels of Arabia Terra (2 - Original NASA/MGS/MSSS b/w Frame)63 visiteOriginal caption:"This MGS-MOC image shows a somewhat sinuous, nearly flat-topped Ridge, located in Eastern Arabia Terra. The ridgetop was once the Floor of a Valley, perhaps carved by running water. The Valley Floor, or material that covered the Floor, was more resistant to erosion than the surrounding rock into which the Valley was cut. Thus, over time, the Valley disappeared and its Floor was left standing high as a Ridge. Inverted Valleys are common on Mars, but they also occur on Earth".
Location near: 10,8° North Lat. and 313,2° West Long.
Image width: width: ~3 Km (~1,9 mi)
Illumination from: lower left
Season: Northern Winter
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Channels-Inverted_Channels_in_Arabia_Terra-PIA03643-04.jpgInverted channels of Arabia Terra (2 - Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)151 visiteOriginal caption:"This MGS-MOC image shows a somewhat sinuous, nearly flat-topped Ridge, located in Eastern Arabia Terra. The ridgetop was once the Floor of a Valley, perhaps carved by running water. The Valley Floor, or material that covered the Floor, was more resistant to erosion than the surrounding rock into which the Valley was cut. Thus, over time, the Valley disappeared and its Floor was left standing high as a Ridge. Inverted Valleys are common on Mars, but they also occur on Earth".
Location near: 10,8° North Lat. and 313,2° West Long.
Image width: width: ~3 Km (~1,9 mi)
Illumination from: lower left
Season: Northern WinterMareKromium
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ESP_022077_2000_RED_abrowse-PCF-LXTT.jpgPossible "Inverted-Topography" in the proximities of Mawrth Vallis (Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)233 visitenessun commentoMareKromium
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PSP_006770_1760_RED_abrowse-00.jpgInverted Channels, North of Juventae Chasma (context frame - MULTISPECTRUM; credits: Lunexit)56 visiteThis image shows raised ridges on a plain to the North of Juventae Chasma. Juventae Chasma, a canyon that is part of the Valles Marineris Canyon System, stretches for about 180 Km (approx. 110 miles) from East to West and about 250 Km (approx. 155 mi) from North to South.
Several examples of raised features have been identified on the plains near this canyon.
In this location, it is most likely that water - either pure or salt water - once flowed through these channels and deposited sediments that eventually filled the channels and became cemented by some chemical precipitating from the flowing water.
Over time, wind eroded the surrounding surface leaving the remnant channels exposed as raised ridges.MareKromium
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PSP_006770_1760_RED_abrowse-01.jpgInverted Channels, North of Juventae Chasma (extra-detail mgnf)55 visiteThe raised ridges in this image have been explained as former stream channels that are now preserved in inverted relief.
On Earth, inverted relief occurs when former depressions become elevated because materials that fill the depressions are more resistant to erosion than the surrounding terrain.
For example: a depression may become filled with lava that is more resistant to erosion than the surrounding surface; gravel or boulders transported in a high energy flow protect underlying material from erosion, or sediments deposited by a flowing stream become cemented.MareKromium
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PSP_007394_1750_RED_abrowse~0.jpgInverted Fluvial Channels and Craters with Ejecta Rays (natural colors; credits: Lunexit)54 visiteThe lower part of this image shows well-defined overlapping channels, which have inverted topography (i.e.: they were once low spots that have been filled in with sediments and now eroded in a such a way that they appear as topographically high regions).
The channels have a winding and intersecting geometry indicating the shifting of the channels over time, a feature consistent with the flow of water in rivers. The channels have small craters that have excavated the channel materials and ejected them to form well-defined rays. There are dark slope streaks (toward the top of the image) showing transport of fine dust down the slope of an eroded bedrock terrain.MareKromium
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PSP_008774_1755_RED_abrowse-PCF-LXTT.jpgLayers and more Inverted Topography (Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)194 visitenessun commentoMareKromium
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PSP_009960_2235_RED.jpgInverted Channel with Phyllosilicates (possible True Colors; credits: Lunar Explorer Italia)64 visiteMars Local Time: 15:26 (early afternoon)
Coord. (centered): 43,4° South Lat. and 309,2° East Long.
Spacecraft altitude: 303,5 Km (such as about 189,7 miles)
Original image scale range: 60,7 cm/pixel (with 1 x 1 binning) so objects ~1,82 mt across are resolved
Map projected scale: 50 cm/pixel
Map projection: EQUIRECTANGULAR
Emission Angle: 6,6°
Phase Angle: 42,0°
Solar Incidence Angle: 48° (meaning that the Sun is about 42° above the Local Horizon)
Solar Longitude: 125,2° (Northern Summer)
Credits: NASA/JPL/University of Arizona
Additional process. and coloring: Lunar Explorer ItaliaMareKromium
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