Publications
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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Relationship of basin structure and bedrock lithology to faulting in the 2019 Ridgecrest earthquake region, California, from gravity and aeromagnetic data Relationship of basin structure and bedrock lithology to faulting in the 2019 Ridgecrest earthquake region, California, from gravity and aeromagnetic data
We investigate patterns of cumulative offsets on the faults that ruptured in 2019 and along the Garlock Fault in the Ridgecrest region, California using recently published gravity and aeromagnetic data. We also examine the relationship of basin structure and bedrock structure to the 2019 M7.1 Ridgecrest earthquake ruptures (Fig. 1A), which were primarily along a dextral northwest...
Authors
Victoria Langenheim, Elizabeth Haddon
Heat-driven functional extinction of Caribbean Acropora corals from Florida's Coral Reef Heat-driven functional extinction of Caribbean Acropora corals from Florida's Coral Reef
In 2023, a record-setting marine heat wave triggered the ninth mass coral bleaching event on Florida’s Coral Reef (FCR). We examined spatial patterns of heat exposure along the ~560-kilometer length of FCR and the mortality of two ecologically important, critically endangered reef-building corals. Sea surface temperatures were ≥31°C for an average of 40.7 days, leading to heat exposures...
Authors
Derek P. Manzello, Ross Cunning, Richard F. Karp, Andrew C. Baker, Erich Bartels, Ryan Bonhag, Alexandra Borreil, Amanda Bourque, Kristen T. Brown, Andrew W. Bruckner, Bryce Corbett, Martine D’Alessandro, Craig Dahlgren, Jenna Dilworth, Erick Gieger, David S. Gilliam, Maya Gomez, Grace Hanson, Cailin Harrell, Dalton Hesley, Lindsay K. Huebner, Carly D. Kenkel, Hannah R. Koch, Joe Kuehl, Ilsa B. Kuffner, Mark C. Ladd, Sophia Lee, Kathryn C. Lesneski, Amanda Lewan, Diego Lirman, Gang Liu, Shayla B. Matsuda, Phanor H. Montoya-Maya, Jennifer Moore, Erinn M. Muller, Ken Nedimeyer, John E. Parkinson, Rob Ruzicka, Jason Spadaro, Blake L. Spady, Jennifer Stein, Joseph D. Unsworth, Alexandra D. Wen, Dana E. Williams, Sara Williams, Olivia M. Williamson
Zircon as a pathfinder to REE mineralization Zircon as a pathfinder to REE mineralization
Carbonatites and alkaline silicate rocks are major primary sources of the rare earth elements (REE) and other critical metals, such as Nb. Despite the economic significance of these rocks, their formation and the processes of REE enrichment are poorly understood. Here, statistical analysis of a global dataset demonstrates that zircon geochemistry is a powerful recorder of REE...
Authors
Ian William Hillenbrand
Precipitation timing mediates life-stage and population-level associations with climate for an indicator species Precipitation timing mediates life-stage and population-level associations with climate for an indicator species
Global climate change is contributing to declines in biodiversity, although changes vary across geographic regions and species. The iconic greater sage-grouse (Centrocercus urophasianus; sage-grouse) is central to conservation within the North American sagebrush ecosystem, yet its vulnerability to climate effects remains poorly understood. We used hierarchical models to explore weather...
Authors
Shawn T. O’Neil, Carl Gregory Lundblad, Brianne E. Brussee, John Christopher Tull, Michael L. Casazza, Justin R. Small, Cameron L. Aldridge, Peter S. Coates
Linking bathythermal habitat selection to management of a migratory freshwater fish Linking bathythermal habitat selection to management of a migratory freshwater fish
Background For migratory fishes, habitat selection in dimensions of temperature and depth may be jointly used to define the bathythermal niche. Seasonal and long-term changes in the availability of bathythermal habitat can cause behavioral responses that have consequences for managing interjurisdictional fisheries that target migratory fishes. Management of such fisheries typically...
Authors
Richard Kraus, Matthew Faust, Scott F. Colborne, Christopher Vandergoot
Greenhouse gas emissions from ditches in oil palm plantations on tropical peatlands in Malaysia Greenhouse gas emissions from ditches in oil palm plantations on tropical peatlands in Malaysia
Tropical peatlands, which store 20% of global peat carbon, are increasingly threatened by conversion to alternative land-uses such as oil palm plantations, pulp wood plantations, crop growth or other economic activities. This transformation involves peatland drainage, which lowers water tables, exposes peat to oxygen, and alters greenhouse gas (GHG) emissions: increasing carbon dioxide...
Authors
Kuno Kasak, Iryna Dronova, Kaido Soosaar, Lulie Melling, Wong Guan Xhuan, Faustina Sangok, Reti Ranniku, Jorge A. Villa, Sheel Bansal, Michael Peacock, Ülo Mander
Year-round daytime pCO2 undersaturation in an instream series of urban reservoirs with a history of harmful algal blooms Year-round daytime pCO2 undersaturation in an instream series of urban reservoirs with a history of harmful algal blooms
Daytime water quality was determined monthly over two years in an instream series of four urban reservoirs with recurring blooms of Prymnesium parvum—a cool-season toxigenic species. Temperature, pH, and laboratory-measured total alkalinity were used to estimate pCO2. System-wide, pCO2 was negatively associated with dissolved oxygen. Chlorophyll-a, phycocyanin (cyanobacterial pigment)...
Authors
Reynaldo Patino, Samantha Lehker
An approach to urban waterway assessment using holistic values and reciprocity An approach to urban waterway assessment using holistic values and reciprocity
Current aquatic ecosystem assessment methods and tools often focus on physical, chemical, and biological indicators of ecosystem health. This approach to ecosystem assessment is not always straightforward to execute in urban environments and ignores potential connectivity between social and environmental outcomes. During a workshop at the Symposium on Urbanization and Stream Ecology in...
Authors
Mateo Scoggins, Isabelle C. Barrett, Belinda I. Margetts, Eugenia Martí, Brian M. Murphy, Allison H. Roy, Ruth I. Shear, Sergia S. Sabat-Bonilla, Natalie A. Griffiths, Vinitha Nanjappa, Kate Mussett, Kasey M. Stirling, Susan Chiblow, Shayenna Nolan
Geochemical evidence for the origin of late Quaternary loess, Seward Peninsula, Alaska Geochemical evidence for the origin of late Quaternary loess, Seward Peninsula, Alaska
Loess is the most widespread surficial deposit in the state of Alaska. Although loess of last glacial age is common in mid-continental North America, records of last glacial loess in Alaska have been elusive. Here we report a record of last glacial loess on the Seward Peninsula, along with studies of a transect of loess localities also thought to date to the last glacial period. Highly...
Authors
Daniel R. Muhs, Jeffrey S. Pigati
Mount Spurr volcano, August 18, 1992: The eruption heard around Alaska Mount Spurr volcano, August 18, 1992: The eruption heard around Alaska
The August 18, 1992, eruption of Mount Spurr volcano, Alaska, produced an impressive Vulcanian to Subplinian eruption column reaching up to 40 km above sea level that blanketed the nearby city of Anchorage with ash. At the time of the eruption, the Alaska Volcano Observatory received reports of audible sound hundreds of kilometers from the source from a variety of azimuths from the...
Authors
Alexandra M. Iezzi, John Power
Cyanotoxin production in shallow subtropical lakes is driven by nutrient enrichment and primary producer abundance on the millennial scale Cyanotoxin production in shallow subtropical lakes is driven by nutrient enrichment and primary producer abundance on the millennial scale
Increased cyanotoxin concentrations from harmful algal blooms (HABs) in lake systems pose a global challenge to water quality. Although progress has been made in monitoring cyanotoxins in modern environments over recent decades, identifying the triggers of cyanotoxin release by cyanobacteria has yielded mixed results from experimental and analytical studies. Paleolimnological...
Authors
Savvas Paradeisis-Stathis, Matthew N. Waters, Debra A. Willard, Sophia Foliano, Richard S. Vachula
Sedimentological and geochemical characterization of lacustrine deposits of the Babouri-Figuil basin, northern Cameroon: Implications for source rocks distribution and petroleum exploration Sedimentological and geochemical characterization of lacustrine deposits of the Babouri-Figuil basin, northern Cameroon: Implications for source rocks distribution and petroleum exploration
The West and Central African Rift System (WCARS) refers to the series of Cretaceous rift basins where commercial hydrocarbon accumulations have been discovered. Some of the WCARS frontier basins are currently being investigated to increase our understanding of these basins in light of new commercial discoveries. The present study was performed in the Babouri-Figuil Basin (BFB), which is
Authors
William Gaspard O. Manga, Paul C. Hackley, Moïse Bessong, Javin J. Hatcherian, Ethel K. Ashukem, Alifa Guedala, Arsène Meying, Elias Samankassou