Publications
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Timing of Cenozoic extension in the southern Stillwater Range and Dixie Valley, Nevada
The Dixie Valley fault bounds the east side of the Stillwater Range in west‐central Nevada and last ruptured in 1954. Offset basalts indicate that slip began more recently than ~14 Ma, and prior work has interpreted the southern segment as an active low‐angle normal fault. Oligocene igneous rocks in the southern Stillwater Range were steeply tilted during large‐magnitude extension prior to ~14 Ma.
Authors
Joseph Colgan, Samuel Johnstone, David L. Shuster
Northward migration of the Oregon forearc on the Gales Creek fault
The Gales Creek fault (GCF) is a 60-km-long, northwest-striking dextral fault system (west of Portland, Oregon) that accommodates northward motion and uplift of the Oregon Coast Range. New geologic mapping and geophysical models confirm inferred offsets from earlier geophysical surveys and document ∼12 km of right-lateral offset of a basement high in Eocene Siletz River Volcanics since ca. 35 Ma a
Authors
Ray Wells, Richard J. Blakely, Sean Bemis
Coexisting seismic behavior of transform faults revealed by high-resolution bathymetry
Transform faults are known to have anomalously low rates of seismicity, but no direct observations reveal why this is the case. We use new, autonomous underwater vehicle high-resolution seafloor mapping to image the morphology of and offsets along transform fault segments in the Gulf of California. Fault splays display a varied history of activation and deactivation of individual fault strands o
Authors
George E. Hilley, Robert M. Sare, Felipe Aron, Curtis W Baden, Dave Caress, Christopher M. Castillo, Stephen C. Dobbs, Jared T Gooley, Samuel Johnstone, Frances Liu, Tim McHargue, Josie M Nevitt, Charles K. Paull, Lauren E. Shumaker, Miles M Traer, Holly H Young
Persistence and plasticity in conifer water-use strategies
The selective use of seasonal precipitation by vegetation is critical to understanding the residence time and flow path of water in watersheds, yet there are limited datasets to test how climate alters these dynamics. Here, we use measurements of the seasonal cycle of tree ring 18O for two widespread conifer species in the Rocky Mountains of North America to provide a multi-decadal depiction of th
Authors
Max Berkelhammer, Chris Still, Francois Ritter, Matthew Winnik, Lesleigh Anderson, Rosemary Carroll, Mariah Carbone, Kenneth Williams
Progress in natural capital accounting for ecosystems
Reversing the ongoing degradation of the planet's ecosystems requires timely and detailed monitoring of ecosystem change and uses. Yet, the System of National Accounts (SNA), first developed in response to the economic crisis of the 1930s and used by statistical offices worldwide to record economic activity (for example, production, consumption, and asset accumulation), does not make explicit eith
Authors
Lars Hein, Kenneth J. Bagstad, Carl Obst, Bram Edens, Sjoerd Schenau, Gem Castillo, Francois Soulard, Claire Brown, Amanda Driver, Michael Bordt, Anton Steurer, Rocky Harris, Alejandro Capparros
Dilution and propagation of provenance trends in sand and mud: Geochemistry and detrital zircon geochronology of modern sediment from central California (U.S.A.)
Integrated, multi-method provenance studies of siliciclastic sedimentary deposits are increasingly used to reconstruct the history of source-to-sink transport, paleogeography, and tectonics. Invariably, analysis of large-scale depositional systems must confront issues regarding how to best sample the system and adequately cope with the details of sediment mixing. Potential biases including variat
Authors
Matthew A. Malkowski, Glenn R. Sharman, Samuel Johnstone, Marty J. Grove, Dave L. Kimbrough, Stephen A. Graham
Estimating burn severity and carbon emissions from a megafire in boreal forests of China
Wildfires, especially those of large size, worsen air quality and alter the carbon cycle through combustion of large quantities of biomass and release of carbon into the atmosphere. The Black Dragon fire, which occurred in 1987 in the boreal forests of China is among the top five of such megafires ever recorded in the world. With over 30 years of accumulation of data and availability of new greenh
Authors
Wenru Xu, Hong S He, Todd Hawbaker, Zhiliang Zhu, Paul Henne
A new stratigraphic framework and constraints for the position of the Paleocene-Eocene boundary in the rapidly subsiding Hanna Basin, Wyoming
The Paleocene–Eocene strata of the rapidly subsiding Hanna Basin give insights in sedimentation patterns and regional paleogeography during the Laramide orogeny and across the climatic event at the Paleocene–Eocene Thermal Maximum (PETM). Abundant coalbeds and carbonaceous shales of the fluvial, paludal, and lacustrine strata of the Hanna Formation offer a different depositional setting than PETM
Authors
Marieke Dechesne, Ellen D Currano, Regan E Dunn, Pennilyn Higgins, Joseph Hartman, Kevin R Chamberlain, Christopher S. Holm-Denoma
A continuously updated, geospatially rectified database of utility-scale wind turbines in the United States
Nearly 60,000 utility-scale wind turbines are installed in the United States as of July, 2019, representing over 97 gigawatts of electric power capacity; US wind turbine installations continue to grow at a rapid pace. Yet, until April 2018, no publicly-available, regularly updated data source existed to describe those turbines and their locations. Under a cooperative research and development agree
Authors
Joesph Rand, Louisa A. Kramer, Christopher P. Garrity, Ben Hoen, James E. Diffendorfer, Hannah Hunt, Michael Spears
Challenges for leveraging citizen science to support statistically robust monitoring programs
Large samples and long time series are often needed for effective broad-scale monitoring of status and trends in wild populations. Obtaining those sample sizes can be more feasible when volunteers contribute to the dataset, but volunteer-selected sites are not always representative of a population. Previous work to account for biased site selection has relied on knowledge of covariates to explain
Authors
Emily L. Weiser, James E. Diffendorfer, Laura Lopez-Hoffman, Darius J. Semmens, Wayne E. Thogmartin
Spatiotemporal variability of modeled watershed scale surface-depression storage and runoff for the conterminous United States
This study uses the explores the viability of a proxy model calibration strategy through assessment of the spatiotemporal variability of surface-depression storage and runoff generated with the U.S. Geological Survey’s National Hydrologic Model (NHM) infrastructure for hydrologic response units (HRUs; n=109,951) across the conterminous United States (CONUS). Simulated values for each HRU of daily
Authors
Jessica M. Driscoll, Lauren Hay, Melanie K. Vanderhoof, Roland J. Viger
An open source database for the synthesis of soil radiocarbon data: ISRaD version 1.0
Radiocarbon is a critical constraint on our estimates of the timescales of soil carbon cycling that can aid in identifying mechanisms of carbon stabilization and destabilization and improve the forecast of soil carbon response to management or environmental change. Despite the wealth of soil radiocarbon data that have been reported over the past 75 years, the ability to apply these data to global-
Authors
Corey R. Lawrence, Jeffrey Beem-Miller, Alison Hoyt, Grey Monroe, Carlos Sierra, Shane Stoner, Katherine Heckman, Joseph Blankinship, Susan Crow, Gavin McNichol, Susan Trumbore, Paul Levine, Olga Vinduśková, Katherine Todd-Brown, Craig Rasmussen, Caitlin Hicks Pries, Christina Schadel, Karis McFarlane, Sebastian Doetterl, Christine Hatté, Yujie He, Claire C. Treat, Jennifer W. Harden, Margaret S. Torn, Cristian Estop-Aragonés, Asmeret A. Berhe, Marco Keiluweit, Agatha Della Rosa Kuhnen, Erika Marin-Spiotta, Alain F. Plante, Aaron Thompson, Zheng Shi, Joshua P. Schimel, Lydia J.S. Vaughn, Sophie F. von Fromm, Rota Wagai