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A river cuts a section
Lumen · High school
Powell boats an unknown river. The canyon is a section the water has cut: walls, strata, a composite of gorges. Not Lyell's causes-now.
Student age
10years · 5th grade
Lumen · High school
Powell boats an unknown river. The canyon is a section the water has cut: walls, strata, a composite of gorges. Not Lyell's causes-now.
Student age
10years · 5th grade