Grand Canyon Erosion (18) In the Austin model (1994) the sedimentary rocks of the Grand Canyon were all deposited during the early part of the &quot;flood-year,&quot; later to be incised into a canyon by the receding waters.
(the sedimentary rocks of the Grand Canyon; were deposited; T:during the early part of the &quot;flood-year,&quot)
the sedimentary rocks of the Grand Canyon
were deposited
T:during the early part of the &quot;flood-year,&quot