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Astronomy Picture of the Day
NASA ^ | 7/23/08 | G. Neukum

Posted on 07/23/2008 2:34:18 PM PDT by sig226


High Cliffs Surrounding Echus Chasma on Mars
Credit:
G. Neukum (FU Berlin) et al., Mars Express, DLR, ESA

Explanation: What created this great cliff on Mars? Did giant waterfalls once plummet through its grooves? With a four-kilometer drop, this high cliff surrounding Echus Chasma, near an impressive impact crater, was carved by either water or lava. A leading hypothesis is that Echus Chasma, at 100-kilometers long and 10-kilometers wide, was once one of the largest water sources on Mars. If true, water once held in Echus Chasma likely ran over the Martian surface to carve the impressive Kasei Valles, which extends over 3,000 kilometers to the north. Even if initially carved by water, lava appears to have later flowed in the valley, leaving an extraordinarily smooth floor. Echus Chasma lies north of tremendous Valles Marineris, the largest canyon in the Solar System. The above image was taken by the robotic Mars Express spacecraft currently orbiting Mars.


TOPICS: Astronomy Picture of the Day
KEYWORDS: apod
If not for the smaller crater, I'd believe the picture was taken in New Mexico.
1 posted on 07/23/2008 2:34:20 PM PDT by sig226
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To: fnord; Number57; KevinDavis; rdb3; MNJohnnie; thoughtomator; RightWhale; proudofthesouth; ...

2 posted on 07/23/2008 2:34:54 PM PDT by sig226 (Real power is not the ability to destroy an enemy. It is the willingness to do it.)
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To: sig226

I always look forward to these pics....thank you for posting them


3 posted on 07/23/2008 2:47:29 PM PDT by Kimmers
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To: sig226

Holy Smokes! Yeah, reminds me of some places in the West I’ve visited. BTW, I’ll be in central New Mexico for a week beginning the 6th of September...any suggestions? Photo ops?


4 posted on 07/23/2008 3:15:02 PM PDT by mozarky2 (Ya never stand so tall as when ya stoop to stomp a statist!)
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To: sig226

Or the Mogollon Rim in Arizona.


5 posted on 07/23/2008 3:22:56 PM PDT by Red_Devil 232 (VietVet - USMC All Ready On The Right? All Ready On The Left? All Ready On The Firing Line!)
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To: sig226

A four kilometer (2.48 mile) drop is a pretty big ravine. The Grand Canyon is only one mile deep at its deepest.


6 posted on 07/23/2008 4:39:18 PM PDT by TigersEye (Drill or get off the Hill. ... call Nancy Pelosi @ 202 - 225 - 0100)
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To: sig226

Wow, thanks... I am astounded at the pictures we get from these far away places.


7 posted on 07/23/2008 5:08:50 PM PDT by clinkclink
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To: mozarky2

I’ve only driven through the state, but this reminded me of the landscape.


8 posted on 07/23/2008 6:58:14 PM PDT by sig226 (Real power is not the ability to destroy an enemy. It is the willingness to do it.)
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