Yes those are common but not on the scale or as noteworthy as the Shenandoah or the Central Valley of California. See Pleasant Valley or Seneca Valley for further information.
Yes, there are mountains and valleys in Antarctica.
no. Unfoutanetly there isnt any vshaped valleys in the nile
valleys some of the tallest mountains and deepest valleys known in the solar system.
no
no
There are several valleys in Chile. Some are bigger than others. Three are the Lutha, Codpa, and Azapa Valleys.
no Maryland did not meet any Indians. no Maryland did not meet any Indians.
Yes
yes
YES
It has craters, caused by meteors hitting it. It also has valleys. You can exlopre it using Google Earth and there are some huge valleys.
Uranus is a gas giant, meaning it has no solid surface, so no valleys.