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Browse more than 160,000 publications authored by our scientists over the past 100+ year history of the USGS.  Publications available are: USGS-authored journal articles, series reports, book chapters, other government publications, and more.

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Regional analysis of the dependence of peak-flow quantiles on climate with application to adjustment to climate trends Regional analysis of the dependence of peak-flow quantiles on climate with application to adjustment to climate trends

Standard flood-frequency analysis methods rely on an assumption of stationarity, but because of growing understanding of climatic persistence and concern regarding the effects of climate change, the need for methods to detect and model nonstationary flood frequency has become widely recognized. In this study, a regional statistical method for estimating the effects of climate variations...
Authors
Thomas M. Over, Mackenzie K. Marti, Hannah Lee Podzorski
By
Central Midwest Water Science Center

The Hardscrabble Creek complex: A newly discovered, mostly buried, Mesoproterozoic mafic-ultramafic pluton in the Wet Mountains, Colorado, USA The Hardscrabble Creek complex: A newly discovered, mostly buried, Mesoproterozoic mafic-ultramafic pluton in the Wet Mountains, Colorado, USA

The origin of prolific ca. 1.4 Ga ferroan magmatism between the southwestern USA and eastern Canada is enigmatic and has been explained by various models, including extensional, mantle plume, and convergent plate-margin models. Rare mafic plutons are associated with the ferroan plutons, which may help constrain their mantle source and tectonic setting. In the southwestern USA, only two...
Authors
Benjamin Patrick Magnin, Sandra S. Brake, Yvette Kuiper, Michael T. Mohr, Richard E. Hanson
By
Mineral Resources Program, Geology, Geophysics, and Geochemistry Science Center

Crustal to mantle melt storage during the evolution of Hawaiian volcanoes Crustal to mantle melt storage during the evolution of Hawaiian volcanoes

As the Pacific Plate migrates over the mantle plume below Hawaiʻi, magma flux decreases, resulting in changes in eruptive volume, style, and composition. It is thought that melt storage becomes deeper and ephemeral with the transition from highly voluminous tholeiitic (shield stage) to the less voluminous alkaline (post-shield and rejuvenation stages) magmatism. To quantitatively test...
Authors
Esteban Gazel, Kyle Dayton, Wenwei Liang, Junlin Hua, Kendra J. Lynn, Julia E. Hammer
By
Volcano Hazards Program, Volcano Science Center

Genetic connectivity in a cooperatively breeding carnivore between two protected areas Genetic connectivity in a cooperatively breeding carnivore between two protected areas

Wildlife populations are increasingly threatened by human activities. Most studies, however, are often short in duration or do not encompass the large spatial extent necessary to measure the potential effects of human activities on population vital rates. Furthermore, the life history features of species with high fecundity and excellent dispersal capabilities can act as buffers against...
Authors
Ariana L. Cerreta, Jennifer R. Adams, Bridget L. Borg, Mathew S. Sorum, Lisette P. Waits, David Edward Ausband
By
Cooperative Research Units

Controls on water quality below a reclaimed surface coal mine, southeastern Montana Controls on water quality below a reclaimed surface coal mine, southeastern Montana

Coal mining and reclamation can have a profound influence on hydrogeologic systems, with clear consequences for groundwater quality, yet their long-term influence on downgradient water quality over time following reclamation is less well documented. Geochemical trends were evaluated in water quality downgradient of a fully reclaimed landscape at the former Big Sky Mine in the Rosebud...
Authors
Skye Keeshin, Stephanie A. Ewing, Elizabeth B Meredith, Robert A. Payne, W. Payton Gardner, Andrew G. Hunt
By
Geology, Geophysics, and Geochemistry Science Center

Variations in road exposure and traffic volumes in the United States in areas susceptible to landslides Variations in road exposure and traffic volumes in the United States in areas susceptible to landslides

There have been many efforts in the United States (U.S.) to identify landslide threats for specific roads, but we are unaware of any effort to examine the entire national road system. We use geospatial tools to estimate the lengths and percentages of total length of roads in landslide-susceptible areas and differentiate results by road type, jurisdiction, and susceptibility level. We...
Authors
Nathan J. Wood, Jeanne M. Jones
By
Western Geographic Science Center
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