Glossary Y

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Yardang
Rock that has developed a streamline form because of wind erosion. The long axis of these features is aligned with the dominant wind direction.

Y-axis
Vertical axis on a graph.

Yearling
An animal that is in its second year of life. A spike bull elk, for example, is a yearling that is 1 1/2 years old in the fall of its second year.

Yellow Snow
Snow that is given golden, or yellow appearance by the presence of pine or cypress pollen in it.