Dam greatly changed the lower miles of the Colorado River, trapping sediment and creating huge silt deposits on the bottom of Lake Mead, but the most significant changes to the Grand Canyon system were caused by the construction of the Glen Canyon Dam in 1963.
(the most significant changes to the Grand Canyon system; were caused; by the construction of the Glen Canyon Dam in 1963) (Dam; greatly changed; the lower miles of the Colorado River; trapping sediment and creating huge silt deposits on the bottom of Lake Mead) Context(Dam greatly changed,List([0, 19))):(Dam; greatly changed the lower miles of the Colorado River trapping; sediment)
Dam greatly changed,List([0, 19))
the most significant changes to the Grand Canyon system Dam Dam
were caused greatly changed greatly changed the lower miles of the Colorado River trapping
by the construction of the Glen Canyon Dam in 1963
the lower miles of the Colorado River trapping sediment and creating huge silt deposits on the bottom of Lake Mead
sediment