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Publications

Below is a list of available NOROCK peer reviewed and published science. If you are in search of a specific publication and cannot find it below or through a search, please contact twojtowicz@usgs.gov.

Filter Total Items: 1216

Climate and reproduction of grizzly bears in Yellowstone National Park

Controversy surrounds the conflicts between the requirements of human safety and the preservation of grizzly bears (Ursus arctos horribilis) in western North America. It has been difficult to separate the effect of factors such as the closure of garbage dumps from that of the climate. It has also proved difficult to relate climatic data to changes in the populations of large mammals. I report here
Authors
Harold D. Picton
By
Ecosystems Mission Area, Northern Rocky Mountain Science Center

Death of a radio-marked grizzly

No abstract available.
Authors
A.L. Kolz, Larry J. Roop, Kenneth R. Greer
By
Ecosystems Mission Area, Northern Rocky Mountain Science Center

Mapping of mountain soils west of Denver, Colorado, for landuse planning

No abstract available.
Authors
P. W. Schmidt, Kenneth L. Pierce
By
Ecosystems Mission Area, Northern Rocky Mountain Science Center

Obsidian hydration dating and correlation of Bull Lake and Pinedale Glaciations near West Yellowstone, Montana

The ages of the last two glaciations near West Yellowstone, Montana, can be calculated by obsidian hydration techniques that are calibrated by K-Ar dating of obsidian-bearing lava flows. The average age of glacial abrasion of obsidian in the Pinedale terminal moraines is about 30,000 yr, with most age measurements between 20,000 and 35,000 yr. For the Bull Lake moraines, it is about 140,000 yr, wi
Authors
Kenneth L. Pierce, J. Obradovich, Irving Friedman
By
Ecosystems Mission Area, Northern Rocky Mountain Science Center