Biology, 07.10.2019 05:20 hsjsjsjdjjd
Ageologist notices that a river is eroding its valley at a constant rate. knowing the height of the valley walls, how coul
geologist figure out when the river started carving the valley?
a.
sit and observe the river for a few hours until the valley walls double in height.
b. fill up the river valley with rocks, and time how long it takes the rocks to wash out
c. divide the height of the valley walls by the rate of erosion.
od. count growth rings of trees growing on the valley floor.
Answers: 3
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