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Fraser
2007-Oct-16, 06:34 PM
Seen one Martian crater and you've seen them all right? Well, check this one out. It's an image of Maunder Crater on the surface of Mars, captured by ESA's Mars Express. ...

Read the full blog entry (http://www.universetoday.com/2007/10/16/maunder-crater-on-mars/)

Paul Whiteley
2007-Oct-17, 01:07 PM
Great photo. Does anyone know the cause of the black markings on the central raised area of the crater?

GOURDHEAD
2007-Oct-17, 01:17 PM
I like the hint that there may be water in them there crater walls. The smootheness of the fill suggests dust covered ice.

01101001
2007-Oct-17, 01:21 PM
Great photo. Does anyone know the cause of the black markings on the central raised area of the crater?

Are they the dark markings described in the ESA article (http://www.esa.int/esaSC/SEMOHJAMS7F_index_0.html):


The small, 500 to 2500-metre long, dark features on the crater floor are eye-catching. These features are called Barchan dunes, one of the most abundant dune forms in arid environments. Dunes of this kind are also found on Earth, for example in the West-African Namib desert.

Barchan dune schematic (http://www.nps.gov/archive/grsa/resources/curriculum/mid/dunes/photo_files/barchan.htm)

Paul Whiteley
2007-Oct-19, 12:02 PM
Thanks for replies. The perspective view really brings it to life.

Ozzy
2007-Oct-20, 02:33 AM
Is it windy on Mars?

JonClarke
2007-Oct-20, 03:20 AM
Very!