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  1. Tropical Fossils in Alaska | Geophysical Institute

    Dec 18, 2025 · Paleobotanist Jack A. Wolfe of the United States Geological Survey at Menlo Park, California, has found a number of tropical rain forest fossils along the eastern Gulf of Alaska. These …

  2. Cottonwood and Balsam Poplar | Geophysical Institute

    Dec 18, 2025 · The Klukwan giant belies the belief that trees tend to get smaller the farther north one goes. Both balsam poplar and cottonwood have value for fuel wood, pulp and lumber.

  3. Pine grove near Yakutat is farthest north | Geophysical Institute

    The trees’ tint was a bit darker than the needles of hemlock and Sitka spruce to which the eye grows accustomed around this Southeast Alaska town. The bottle-brush branches of the pines curved …

  4. Northern Tree Habitats | Geophysical Institute

    Dec 18, 2025 · Why take a chance with exotics, when native trees have proven their ability to survive? Several reasons prompt testing of foreign tree species. Human activities often create and maintain …

  5. Burls - Geophysical Institute

    Dec 18, 2025 · Burls weaken trees but do not kill them. The weakening effect, however, makes the trees vulnerable to other diseases which can kill them. Relatively little is known about burls, for several …

  6. The majesty and mystery of Alaska yellow cedar | Geophysical Institute

    Jul 23, 2021 · Here, in a forest a few hundred feet above a shrinking glacier, Gaglioti is felling one of the most enigmatic trees in Alaska: an Alaska yellow cedar. These trees, which can live longer than …

  7. Tamarack -- Not A Dead Spruce | Geophysical Institute

    Dec 18, 2025 · When one of these trees finds itself on a better site, however, it shows a remarkable change of pace. Individual tamarack growing in white spruce stands may achieve a size comparable …

  8. Black Spruce | Geophysical Institute

    Dec 18, 2025 · Somehow black spruce trees seem like the jackasses of the northern forests--sort of ungainly looking, ugly little beasts that somehow can survive under conditions prohibitive to the taller …

  9. The largest black spruce in Alaska | Geophysical Institute

    Aug 16, 2010 · The Alaska champion black spruce tree stands on the campus of the University of Alaska Fairbanks. The tree lives in a mixed forest next to large white spruce trees, mature birch and a few …

  10. The Kodiak Treeline | Geophysical Institute

    Dec 18, 2025 · Spruce trees planted on the islands by the Russians in 1805 are doing just fine and reseeding themselves naturally, although the total tree population hardly amounts to a forest.