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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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Filter Total Items: 175531

Chemical and isotopic fractionation during melt inclusion formation Chemical and isotopic fractionation during melt inclusion formation

Melt inclusions are used to study the origin and evolution of magmas. The extent to which they represent equilibrium melt compositions, however, critically hinges on the ratio of crystal growth rate to diffusion rate in melts. If the rate of crystal growth is limited by the supply of nutrients and the dissipation of unwanted components, the trapped melt will be depleted in compatible...
Authors
Bruna da Silva Ricardo, Martin Oeser, Kendra J. Lynn, Neil Bennett, Xu Chu, Grace C. Henderson, Y. Liu, Stephan Weyer, Corliss Kin I Sio
By
Volcano Hazards Program, Volcano Science Center

Accounting for non-random samples with distance sampling to estimate population density Accounting for non-random samples with distance sampling to estimate population density

A critical assumption of standard distance sampling is that sampling lines are located such that animals are uniformly distributed as a function of distance from the line. Failure to meet this assumption can introduce bias in the estimator.Many studies have used landscape features, such as roads or rivers, as lines, which can violate assumptions of distance sampling in two ways. First...
Authors
Duane R. Diefenbach, Jacob Trowbridge, Amanda N. Van Buskirk, Tess McConnell, Kevin Lamp, Tiago A. Marques, David Walters, Bret D. Wallingford, Christopher S. Rosenberry
By
Cooperative Research Units

How will we prepare for an uncertain future? The value of open data and code for unborn generations facing climate change How will we prepare for an uncertain future? The value of open data and code for unborn generations facing climate change

As the impacts of climate change continue to intensify, humans face new challenges to long-term survival. Humans will likely be battling these problems long after 2100, when many climate projections currently end. A more forward-thinking view on our science and its direction may help better prepare for the future of our species. Researchers may consider datasets the basic units of...
Authors
Dylan Gerald-Everett Gomes
By
Ecosystems Mission Area, Forest and Rangeland Ecosystem Science Center

Unobserved individual and population level impacts of fishing gear entanglements on North Atlantic right whales Unobserved individual and population level impacts of fishing gear entanglements on North Atlantic right whales

Fishing gear entanglements can compromise health and lower survival and reproductive output of wildlife, which can slow population growth or cause population declines. However, entanglements may go unobserved, making it difficult to quantify their effects on individuals' vital rates and a population's trajectory. Fishing gear entanglements are a leading cause of death for North Atlantic...
Authors
Nathan J. Crum, Timothy A. Gowan, J. A. Hostetler, Robert S. Schick, Amy R. Knowlton, Heather M. Pettis, Philip K. Hamilton, Rosalind M. Rolland
By
Eastern Ecological Science Center

An unexplained tsunami: Was there megathrust slip during the 2020 Mw7.6 Sand Point, Alaska, earthquake? An unexplained tsunami: Was there megathrust slip during the 2020 Mw7.6 Sand Point, Alaska, earthquake?

On October 19, 2020, the Mw7.6 Sand Point earthquake struck south of the Shumagin Islands in Alaska. Moment tensors indicate the earthquake was primarily strike-slip, yet the event produced an enigmatic tsunami that was larger and more widespread than expected for an earthquake of that magnitude and mechanism. Using a suite of hydrodynamic, seismic, and geodetic modeling techniques, we...
Authors
Sean R. Santellanes, Dara Elyse Goldberg, Pablo Koch, Diego Melgar, William L. Yeck, Brendan W. Crowell, Jiun-Ting Lin
By
Geologic Hazards Science Center

Characterizing sedimentary organic carbon in a hydrothermal spreading center, the Escanaba Trough Characterizing sedimentary organic carbon in a hydrothermal spreading center, the Escanaba Trough

Sediments in critical marine mineral environments are of wide importance due to their preservation of both marine minerals and organic carbon (OC) stocks. However, OC storage and cycling is often overlooked in mineral system studies. This work characterizes sedimentary OC within the Escanaba Trough, a hydrothermal sulfide system off the coast of northern California. By utilizing ROV...
Authors
Hope Lee Ianiri, Pamela L. Campbell‐Swarzenski, Amy Gartman, Nancy G. Prouty
By
Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center
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