Most likely, some prehistoric ocean life lived in the general area, as the Grand Canyon was most likely covered in ocean at the time of the dinosaurs. By ocean life, I mean trilobites, orthocones, and graptolites.
Look, there's another canyon we can explore! That canyon looks so grand!
to protect the grand canyon, one must apply for a patent, and use it to help bin laden in his journies
To protect it for use by future generations.
Last year, we visited the Grand Canyon.
The grand canyon is considered to be a natural phenomenon
The Grand Canyon is one of the biggest escarpments in the world.
To say that the Grand Canyon is nice is to understate its grandeur.
Grand Canyon tours can be purchased from a variety of online retailers such as Tours Incorporated, and they can even be discounted through the use of tickets or coupons.
To draw a canyon on a map, use contour lines to represent the elevation changes. Show the canyon as a narrow, deep depression with steep sides on the map. Use shading or symbols to indicate the depth and ruggedness of the canyon.
The deepist part is the sea it use to flow ther.
By the use of time, water and an occasional flood.
You can use chasm in your question, lol! "The Grand Canyon has a lot of deep CHASMS." There you go. :)