Venus ~ Meshkenet Tessera Region
Image Courtesy of NASA
Tessera is a "complex ridged" surface feature seen on Venusian plateau highlands (and maybe on Neptune's moon Triton). Tessera is thought to be caused by crustal folding, buckling, and breaking. The presence of tessera on Venus suggests that the Venusian surface may be subject to piecewise lateral motions. This process may be related to the process of mountain-building on Earth. But, because Venus does not have continental drift, the process must occur somewhat differently. These features are found on some of the Venus Plateau Highlands.
Image Courtesy of NASA/JPL
Figure 3-13. Meshkenet Tessera is shown in this image from the Venera 15 and 16 missions.
Nightingale and Earhart Coronae are located in the center of the image east of Meshkenet.
Tessera Region Topographic Map
Credit: U.S. Geological Survey
Download this map as an ~47" x 42" PDF document (sim3018_map.pdf; 45.6 MB)
Download the accompanying pamphlet as an 18-page PDF document (sim3018_pamphlet.pdf; 800 kB)
For questions about the content of this report, contact Ken Tanaka
Suggested citation and version history
Tessera Region Available Lot Map
PDF VERSION FULL SIZE
Meshkenet Tessera Region History
Image Courtesy of NASA/JPL
Figure 6-8. Approximately 40 radar-bright streaks are located within a dune field centered 67.7°N, 90.5°E. The wind streaks indicate that the dunes are oriented transverse to the prevailing winds. Radar illumination is from the left at an incidence angle of 25 deg. he Fortuna-Meshkenet dune field (Figure 6-8) is in a valley between Ishtar Terra and Meshkenet Tessera. Approximately 40 radar-bright fan streaks occur within the field. The wind streaks indicate that the dunes are oriented transverse to a prevailing wind from the east-southeast. The streaks appear to originate from small, radar-bright cones (Figure 6-9) and probably consist of the same high radar reflectivity material as the cones. The Cycle 1 image (Figure 6-8) and the Cycle 2 image (Figure 6-10) were both obtained at a 25-deg look angle, but from opposite sides. There appears to be no movement of the dunes or streaks between the Cycle 1 and 2 images. Because the illumination directions are opposite and because there are dune faces in the southern....
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