Student Page 2

Pollen tells a Story

Years B.P. Dominant Pollen Others
14,000 - 10,900 Spruce 60% Larch 10%, Hemlock 10%, Grasses 20%
10,900 - 9,000 Ash 30% Sruce 20%, Grasses 25%, Walnut 5%, Oak 10%, Hickory 10%
9,000 - 8,000 Oak/Hickory 15/15% Spruce 10%, Grasses 40%, Walnut 10%, Ash 10%
8,000 - 900 Grasses 70% Oak/Hickory 10/10%, Walnut 5%, Ash 5%
900 - 200 Spruce 30% Larch 10%, Grasses 40%, Oak 10%, Hickory 10%
200 - 150 Grasses 30% Oak 20%, Hickory 20%, Spruce 10%, Walnut 10%, Ash 5%, Larch 5%
150 - Present Agricultural Grains 60% Oak/Hickory 15/15%, Grasses 10%
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