John wesley powell, who led the first boat trip through the grand canyon, called the feature marked by the yellow lines above "the great ". what did he put in the blank?

a. unconformity.
b. pull-apart fault.
c. thrust fault.
d. trompe l'oeil.
e. intrusion.

A. unconformity.

Explanation:

After 1869, J. Powell set sail to explore the colorado river and the grande canyons and once has a confluences with the colorado river and the market the place with the lines in yellow has to represent the unconformity of the zones and are a buried erosional and a non-depositional surface that separates the two rocks, masses into the two surfaces and thus indicate the sediments deposited are not continuous.

D.haka is the first answer and a.canberra is the second answer

Where's the we need to see the it could be any country!