Difference between revisions of "Ismenius Lacus quadrangle"

From Marspedia
Jump to: navigation, search
m
Line 16: Line 16:
  
  
−
This quadrangle has some of the most mysterious-looking landscapes on the planet.  It truly looks like another world here.  The Ismenius Lacus quadrangle contains regions called Deuteronilus Mensae and Protonilus Mensae, two places that are of special interest to scientists.  They contain abundant evidence of present and past glacial activity.  They also have a landscape unique to Mars, called Fretted terrain.  The largest crater in the area is Lyot Crater, which contains channels probably carved by liquid water.<ref>Carter | first1 = J. | last2 = Poulet | first2 = F. | last3 = Bibring | first3 = J.-P. | last4 = Murchie | first4 = S. | year = 2010 | title = Detection of Hydrated Silicates in Crustal Outcrops in the Northern Plains of Mars | url = | journal = Science | volume = 328 | issue = 5986| pages = 1682–1686 |  
+
This quadrangle has some of the most mysterious-looking landscapes on the planet.  It truly looks like another world here.  The Ismenius Lacus quadrangle contains regions called Deuteronilus Mensae and Protonilus Mensae, two places that are of special interest to scientists.  They contain abundant evidence of present and past glacial activity.  They also have a landscape unique to Mars, called Fretted terrain.  The largest crater in the area is Lyot Crater, which contains channels probably carved by liquid water.<ref>Carter | first1 = J. | last2 = Poulet | first2 = F. | last3 = Bibring | first3 = J.-P. | last4 = Murchie | first4 = S. | year = 2010 | title = Detection of Hydrated Silicates in Crustal Outcrops in the Northern Plains of Mars | url = | journal = Science | volume = 328 | issue = 5986| pages = 1682–1686 | </ref>
 
The Ismenius Lacus quadrangle  is located in the northern hemisphere and covers 30° to 65° north latitude and 300° to 360° west longitude (60° to 0° east longitude). The southern and northern borders of the Ismenius Lacus quadrangle are approximately 3065 km (1,905 mi) and 1500 km wide (930 mi)  respectively. The north-to-south distance is about 2050 km (1,270 mi) (a bit less than the length of Greenland).<ref>Distances calculated using NASA World Wind measuring tool. http://worldwind.arc.nasa.gov/.</ref> The Ismenius Lacus quadrangle contains parts of regions named Acidalia Planitia, Arabia Terra, Vastitas Borealis, and Terra Sabaea.<ref>http://planetarynames.wr.usgs.gov/SearchResults?target=MARS&featureType=Terra,%20terrae</ref>
 
The Ismenius Lacus quadrangle  is located in the northern hemisphere and covers 30° to 65° north latitude and 300° to 360° west longitude (60° to 0° east longitude). The southern and northern borders of the Ismenius Lacus quadrangle are approximately 3065 km (1,905 mi) and 1500 km wide (930 mi)  respectively. The north-to-south distance is about 2050 km (1,270 mi) (a bit less than the length of Greenland).<ref>Distances calculated using NASA World Wind measuring tool. http://worldwind.arc.nasa.gov/.</ref> The Ismenius Lacus quadrangle contains parts of regions named Acidalia Planitia, Arabia Terra, Vastitas Borealis, and Terra Sabaea.<ref>http://planetarynames.wr.usgs.gov/SearchResults?target=MARS&featureType=Terra,%20terrae</ref>
  

Revision as of 09:19, 7 March 2020

Mars topography (MOLA dataset) HiRes (1).jpg
MC-05 Ismenius Lacus 30–65° N 0–60° E Quadrangles Atlas

  • Elevations

  • PIA00165-Mars-MC-5-IsmeniusLacusRegion-19980604.jpg


This quadrangle has some of the most mysterious-looking landscapes on the planet. It truly looks like another world here. The Ismenius Lacus quadrangle contains regions called Deuteronilus Mensae and Protonilus Mensae, two places that are of special interest to scientists. They contain abundant evidence of present and past glacial activity. They also have a landscape unique to Mars, called Fretted terrain. The largest crater in the area is Lyot Crater, which contains channels probably carved by liquid water.[1] The Ismenius Lacus quadrangle is located in the northern hemisphere and covers 30° to 65° north latitude and 300° to 360° west longitude (60° to 0° east longitude). The southern and northern borders of the Ismenius Lacus quadrangle are approximately 3065 km (1,905 mi) and 1500 km wide (930 mi) respectively. The north-to-south distance is about 2050 km (1,270 mi) (a bit less than the length of Greenland).[2] The Ismenius Lacus quadrangle contains parts of regions named Acidalia Planitia, Arabia Terra, Vastitas Borealis, and Terra Sabaea.[3]

Origin of names

Ismenius Lacus is the name of a classical albedo feature located at 40° N and 30° E on Mars. The term is Latin for Ismenian Lake, and refers to the Ismenian Spring near Thebes in Greece where Cadmus slew the guardian dragon. Cadmus was the legendary founder of Thebes, and had come to the spring to fetch water. The name was approved by the International Astronomical Union (IAU) in 1958.[4] All names suggested for astronomical features have to eventually approved by the International Astronomical Union (IAU). Some important areas in this quadrangle derive from the names of canals that some early astronomers saw in this broad area. One such large canal they called Nilus. Since 1881–1882 it was split into other canals, some were called Nilosyrtis, Protonilus (first Nile),and Deuteronilus (second Nile).[5]

Channels (Rivers)

Many features were probably rivers with water flowing in them billions of years ago. Pictures below show many channels and parts of channels.


The channel shown below goes quite a long distance and has branches. It ends in a depression that may have been a lake at one time. The first picture is a wide angle, taken with CTX; while the second is a close up taken with HiRISE.[6]


  • Channels in Arabia, as seen by CTX This channel winds along for a good distance and has branches. It ends in a depression that may have been a lake at one time.

  • Channel in Arabia, as seen by HiRISE under HiWish program. This is an enlargement of the previous image that was taken with CTX to give a wide view.

Some places (like below) display a smaller channel within a larger, wider channel or valley. When this occurs it means water went through the region at least two times in the past. This implies that water was not here once for just a short period of time.

  • Channel within larger channel The existence of the smaller channel suggests water went through the region at least two times in the past.

  • Close-up of channel within larger channel The existence of the smaller channel suggests water went through the region at least two times in the past. The black box represents the size of a football field. Some parts of the surface would be difficult to walk on with the many small hills and depressions.

  • Channel system that travels through part of a crater

  • Channel that cut through a crater rim

  • Channel system that travels through part of a crater Note: this is an enlargement of a previous image.

  • Channel that travels through part of a crater The arrow shows a crater that was eroded by the channel. Note: this is an enlargement of a previous image.

  • Channels

  • Meander in a channel Meanders are commonly formed in old river systems when the water is moving slowly.

  • Wide view of channels

  • Close view of channel

  • Channel that has cut through a crater rim

  • Wide view of channels, as seen by HiRISE under HiWish program

  • Wide view of channels

  • Channel

  • Wide view of channels

  • Channel with hanging valley

  • Wide view of channels

  • Wide view of channels, as seen by HiRISE under HiWish program

  • Channel

  • Channels

  • Channels, as seen by HiRISE under HiWish program

  • Channels, Some parts of the image show mantle and others show no mantle covering the surface.

  • Possible inverted channel Here after a stream bed got filled with erosion resistant materials, the surrounding, softer landscape eroded away.

See also

References

  1. ↑ Carter | first1 = J. | last2 = Poulet | first2 = F. | last3 = Bibring | first3 = J.-P. | last4 = Murchie | first4 = S. | year = 2010 | title = Detection of Hydrated Silicates in Crustal Outcrops in the Northern Plains of Mars | url = | journal = Science | volume = 328 | issue = 5986| pages = 1682–1686 |
  2. ↑ Distances calculated using NASA World Wind measuring tool. http://worldwind.arc.nasa.gov/.
  3. ↑ http://planetarynames.wr.usgs.gov/SearchResults?target=MARS&featureType=Terra,%20terrae
  4. ↑ USGS Gazetteer of Planetary Nomenclature. Mars. http://planetarynames.wr.usgs.gov/.
  5. ↑ Blunck, J. 1982. Mars and its Satellites. Exposition Press. Smithtown, N.Y.
  6. ↑ http://www.uahirise.org/ESP_039997_2170


Retrieved from "https://marspedia.org/index.php?title=Ismenius_Lacus_quadrangle&oldid=134334"