'Chasm' or 'abyss' should work.
ravine
coulees
Canyon or ravine.
The word is ravine.
the ravine was so deep
The ravine was so rocky that the man triped Hope this helped
An American word for a rocky ravine or dry watercourse is "arroyo."
Ravi.
the ravine was so deep that the man plunged in to the heavy rocks
The word "ravine" is a noun. It refers to a deep, narrow valley with steep sides typically carved by running water.
arroyo
Take the horse down to the ravine so that he won't be conspicuous to anyone who rides by.