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• THE LUNAR EXPLORER ARCHIVES
• MOON
• MARS
• SOLAR SYSTEM
• DEEP SKY

A R C H I V E S

The Ridge captured in this HiRISE image is called "Wrinkle Ridge" and it is located in Hesperia Planum, a Region of over two million Square Kilometers (such as more than over 770.000 Square Miles); Hesperia Planum lies in the Southern Highlands of Mars (North/West of the giant Hellas Impact Basin and adjacent to Tyrrhena Patera). Hesperia Planum seem to contain abundant - both orthogonal and intersecting - Wrinkle Ridges.

Wrinkle Ridges, briefly, are long, winding topographic highs, often characterized by a broad arch with superposed narrow asymmetric Ridges. These kind of features have also been identified on the Moon, Mercury, and Venus so far.

Their origin is attributed to horizontal compression or shortening of the Crust, due to faulting and folding. They commonly have asymmetrical cross sectional profiles and an offset in elevation on either side of the Ridge. In this frame, we can see that superposing (meaning that it is located on top of) the Wrinkle Ridge, there is a relatively fresh Unnamed Impact Crater. It is possible to say that such a Crater is relatively recent because of its sharp (or "crisp") Rim and its substantially unmodified shape.

If you look closely, then, you will be able to see also faint Rays made of fine Rocky Material, Boulders and smaller Secondary Craters radiating from the main one and superposing the Wrinkle Ridge as well many other (and older) surrounding small Impact Craters.

Mars Local Solar Time: 14:50 (early afternoon)
Coord. (centered): 19,7° South Lat. and 114,9° East Long.
Spacecraft altitude: 256,8 Km (such as about 160,5 miles)
Original image scale range: 25,7 cm/pixel (with 1 x 1 binning) so objects ~ 77 cm across are resolved
Map projected scale: 25 cm/pixel
Map projection: EQUIRECTANGULAR
Emission Angle: 4,0°
Sun - Mars - MRO (or "Phase") Angle: 58,7°
Solar Incidence Angle: 56° (meaning that the Sun is about 34° above the Local Horizon)
Solar Longitude: 43,4° (Northern Spring)

This frame has been colorized in Absolute Natural Colors (such as the colors that a human eye would actually perceive if someone were onboard the NASA - Mars Reconnaissance Orbiter and then looked down towards the Surface of Mars), by using an original technique created - and, in time, dramatically improved - by the Lunar Explorer Italia Team.

Special thanks to Maria Banks.