Millions of years of erosion created the Grand Canyon, the Colorado and its tributaries slowly etching their way through billion-plus year-old rocks to create broad stripes and leave a record of the canyon's geologic history in its cliff walls.
(Millions of years of erosion; created; the Grand Canyon, the Colorado and its tributaries; slowly etching their way through billion-plus year-old rocks to create broad stripes and leave a record of the canyon's geologic history in its cliff walls) Context(Millions of years of erosion created,List([0, 36))):(Millions of years of erosion; created the Grand Canyon, the Colorado and its tributaries slowly etching; their way; through billion-plus year-old rocks)
Millions of years of erosion created,List([0, 36))
Millions of years of erosion Millions of years of erosion
created created the Grand Canyon, the Colorado and its tributaries slowly etching
the Grand Canyon, the Colorado and its tributaries slowly etching their way through billion-plus year-old rocks to create broad stripes and leave a record of the canyon's geologic history in its cliff walls
their way through billion-plus year-old rocks