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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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