PIA19124: A Fresh, Lunar-Like Crater on Mars
 Target Name:  Mars
 Is a satellite of:  Sol (our sun)
 Mission:  Mars Reconnaissance Orbiter (MRO)
 Spacecraft:  Mars Reconnaissance Orbiter (MRO)
 Instrument:  HiRISE
 Product Size:  2560 x 1920 pixels (w x h)
 Produced By:  University of Arizona/HiRISE-LPL
Other products from image ESP_020077_1915
 Full-Res TIFF:  PIA19124.tif (14.75 MB)
 Full-Res JPEG:  PIA19124.jpg (855.5 kB)

Click on the image above to download a moderately sized image in JPEG format (possibly reduced in size from original)

Original Caption Released with Image:

Click here for larger version of PIA19124
Map Projected Browse Image
Click on the image for larger version

This image is of an approximately 5 kilometer (approx. 3.1 mile) diameter crater that is one of the rare examples of a fresh "lunar-like" crater on Mars. The impact crater formed in the Tharsis region, which is the volcanic region on Mars that harbors the great Olympus Mons volcano -- in fact, this crater lies just 150 kilometer (94 miles) from the flanks of Olympus.

Now most really fresh craters on Mars typically have floors with a frothy, pitted deposit on them (see Zumba Crater caption), which possibly suggesting that water/ice was present in the subsurface prior to impact.

This 5 kilometer crater completely lacks such materials. Instead, the crater possess a deposit is generally smooth with some rocks peppered throughout the deposit. This is more similar to observations of fresh craters on the Moon. This distinction from the more typical pitted crater floor deposit may support that the lavas sampled by this crater were low in water/ice or dry at the time of impact. There are some smaller craters superimposed on the floor, which is a sign that the crater is reasonably fresh, but not as recent as other craters on Mars.

There's also a lot of Martian dust in this crater, which often gives geologic forms a somewhat muted appearance, some of that dust and fine-grained material may be the source of the materials that comprise the "sand" ripples in the bottom-half of the subimage.

Note: By "fresh," we are speaking in geologic terms, not something that just occurred.

HiRISE is one of six instruments on NASA's Mars Reconnaissance Orbiter. The University of Arizona, Tucson, operates HiRISE, which was built by Ball Aerospace & Technologies Corp., Boulder, Colorado. NASA's Jet Propulsion Laboratory, a division of the California Institute of Technology in Pasadena, manages the Mars Reconnaissance Orbiter Project for NASA's Science Mission Directorate, Washington.

Image Credit:
NASA/JPL-Caltech/University of Arizona

Image Addition Date: