HOW WERE THE LARGE CANYONS ON MARS THOUGHT TO HAVE BEEN FORMED?

Answer 1

Since this is not my area of expertise, I searched Google under the key words "Mars canyons formation" to get these possible sources:

http://www.lukew.com/marsgeo/tectonic2.html
http://www.webspawner.com/users/theory/
http://mpfwww.jpl.nasa.gov/education/modules/webpages/module3.htm
http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6WGF-4D4PR3P-2&_user=10&_rdoc=1&_fmt=&_orig=search&_sort=d&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=7210c6a684af60e597051904a754b8b0
http://books.google.com/books?id=uLHlJ6sjohwC&pg=PA110&lpg=PA110&dq=mars+canyons+formation&source=web&ots=NgFX9mHC3W&sig=_7cB8RcLgmgaMKv0Tg9wuMyPwtA

In the future, you can find the information you desire more quickly, if you use appropriate key words to do your own search.

I hope this helps. Thanks for asking.

Answer 2

BY CHANGING