
Cottonwood and Balsam Poplar | Geophysical Institute
Oct 23, 2025 · The Klukwan giant holds the national record for black cottonwood diameter. Its nearest rival, a tree near Salem, Oregon, does hold the national height record. The Klukwan …
Northern Tree Habitats - Geophysical Institute
Oct 23, 2025 · Interior Alaskan forests have only six native tree species: white spruce, black spruce, quaking aspen, balsam poplar, larch (tamarack) and paper birch. Northern Canadian …
Trees as Earthquake Fault Indicators | Geophysical Institute
Oct 16, 2025 · Then using tree ring dating methods, it may be possible to date earthquakes occurring before historical records were kept. The ability to identify and date very large …
The largest black spruce in Alaska | Geophysical Institute
Aug 16, 2010 · The tree leans uphill, and its trunk is 45 inches around. When I hugged it, I could barely clasp my hands together. The largest black spruce in Alaska is a lucky tree, because its …
The majesty and mystery of Alaska yellow cedar | Geophysical …
Jul 23, 2021 · A tree near one of our campsites had a crack at its base through which we could pass the folded saw. Yet the tree was still alive, with just one rope of cambium — the outer …
More on Why Tree Trunks Spiral | Geophysical Institute
Oct 23, 2025 · I eventually found a tree with a spiral lightning mark and it followed the spiral grain exactly. One tree, of course, proves nothing. "But why should the tree spiral? More speculation …
Feltleaf willows: Alaska’s most abundant tree
May 25, 2023 · All over Alaska, moose are sucking in new leaves like whales inhaling plankton. The most plentiful moose food in the state — and probably Alaska’s most numerous tree — is …
Tamarack -- Not A Dead Spruce | Geophysical Institute
2 days ago · It is not possible to foretell if tamarack may some day become a commercial crop, but one thing is certain: the "spruce that dies" each fall has some unique qualities that make it …
Burls - Geophysical Institute
Oct 16, 2025 · Burls, spherical woody growths on the trunks of spruce, birch and other trees, are commonly found throughout wooded parts of Alaska.
Tropical Fossils in Alaska | Geophysical Institute
Oct 23, 2025 · A 20-inch fossil palm leaf that once waved over a tropical forest in Alaska 45-60 million years ago. The fossil was found in rocks near the Malaspina Glacier. Photo from the …