Moe Pond is a dimictic impoundment with surface area of 15.6 ha, a mean depth of 1.8 m, and an unexploited fish community of only two species: brown bullhead (Ameiurus nebulosus) and golden shiner (Notemigonus crysoleucas). The age-1 and older brown bullhead population was estimated to be 4,057 individuals, based on the Schnabel capture-recapture method of population estimation. Density and biomass were respectively estimated at 260 individuals/ha and 13 kg/ha. Annual survival rate of age-2 through age-5 brown bullheads was estimated at 48%. The golden shiner length-frequency distribution was unimodal with modal length of 80 mm and maximum total length of 115 mm. The golden shiner population estimate was 7,154 individuals, based on seven beach seine haul replicate samples; the density and biomass were 686 shiners/ha and 5 kg/ha, respectively. This study provides an information baseline that may be useful in understanding food web interactions and whole-pond nutrient flux.
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The Object-User Interface (OUI) is a map-based interface for models and modeling data. It provides a common interface to run hydrologic models and acquire, browse, organize, and select spatial and temporal data. One application is to assist river managers in utilizing streamflow forecasts generated with the Precipitation-Runoff Modeling System running in the Modular Modeling System (MMS), a distributed-parameter watershed model, and the National Weather Service Extended Streamflow Prediction (ESP) methodology.","largerWorkTitle":"Proceedings of The Western Snow Conference","conferenceTitle":"69th Annual Meeting Western Snow Conference","conferenceDate":"16 April 2001 through 19 April 2001","conferenceLocation":"Sun Valley, ID","language":"English","issn":"01610589","usgsCitation":"Jeton, A., 2001, Streamflow forecasting using the modular modeling system and an object-user interface, in Proceedings of The Western Snow Conference, Sun Valley, ID, 16 April 2001 through 19 April 2001, p. 85-91.","startPage":"85","endPage":"91","numberOfPages":"7","costCenters":[],"links":[{"id":233731,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b9aeee4b08c986b31cbba","contributors":{"authors":[{"text":"Jeton, A.E.","contributorId":61841,"corporation":false,"usgs":true,"family":"Jeton","given":"A.E.","email":"","affiliations":[],"preferred":false,"id":396030,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70022986,"text":"70022986 - 2001 - Predictions of hydrothermal alteration within near-ridge oceanic crust from coordinated geochemical and fluid flow models","interactions":[],"lastModifiedDate":"2018-03-21T15:38:21","indexId":"70022986","displayToPublicDate":"2001-01-01T00:00:00","publicationYear":"2001","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2499,"text":"Journal of Volcanology and Geothermal Research","active":true,"publicationSubtype":{"id":10}},"title":"Predictions of hydrothermal alteration within near-ridge oceanic crust from coordinated geochemical and fluid flow models","docAbstract":"Coordinated geochemical and hydrological calculations guide our understanding of the composition, fluid flow patterns, and thermal structure of near-ridge oceanic crust. The case study presented here illustrates geochemical and thermal changes taking place as oceanic crust ages from 0.2 to 1.0 Myr. Using a finite element code, we model fluid flow and heat transport through the upper few hundred meters of an abyssal hill created at an intermediate spreading rate. We use a reaction path model with a customized database to calculate equilibrium fluid compositions and mineral assemblages of basalt and seawater at 500 bars and temperatures ranging from 150 to 400??C. In one scenario, reaction path calculations suggest that volume increases on the order of 10% may occur within portions of the basaltic basement. If this change in volume occurred, it would be sufficient to fill all primary porosity in some locations, effectively sealing off portions of the oceanic crust. Thermal profiles resulting from fluid flow simulations indicate that volume changes along this possible reaction path occur primarily within the first 0.4 Myr of crustal aging. ?? 2001 Elsevier Science B.V. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Volcanology and Geothermal Research","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/S0377-0273(01)00215-3","issn":"03770273","usgsCitation":"Wetzel, L., Raffensperger, J.P., and Shock, E., 2001, Predictions of hydrothermal alteration within near-ridge oceanic crust from coordinated geochemical and fluid flow models: Journal of Volcanology and Geothermal Research, v. 110, no. 3-4, p. 319-342, https://doi.org/10.1016/S0377-0273(01)00215-3.","startPage":"319","endPage":"342","numberOfPages":"24","costCenters":[],"links":[{"id":233545,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":208103,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/S0377-0273(01)00215-3"}],"volume":"110","issue":"3-4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a81fae4b0c8380cd7b830","contributors":{"authors":[{"text":"Wetzel, L.R.","contributorId":9525,"corporation":false,"usgs":true,"family":"Wetzel","given":"L.R.","email":"","affiliations":[],"preferred":false,"id":395701,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Raffensperger, Jeff P. 0000-0001-9275-6646 jpraffen@usgs.gov","orcid":"https://orcid.org/0000-0001-9275-6646","contributorId":199119,"corporation":false,"usgs":true,"family":"Raffensperger","given":"Jeff","email":"jpraffen@usgs.gov","middleInitial":"P.","affiliations":[{"id":374,"text":"Maryland Water Science Center","active":true,"usgs":true}],"preferred":true,"id":395703,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Shock, E.L.","contributorId":54071,"corporation":false,"usgs":true,"family":"Shock","given":"E.L.","email":"","affiliations":[],"preferred":false,"id":395702,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":1016562,"text":"1016562 - 2001 - Impact of the Conservation Reserve Program on duck recruitment in the U.S. Prairie Pothole Region","interactions":[],"lastModifiedDate":"2018-01-05T10:17:51","indexId":"1016562","displayToPublicDate":"2001-01-01T00:00:00","publicationYear":"2001","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2508,"text":"Journal of Wildlife Management","active":true,"publicationSubtype":{"id":10}},"title":"Impact of the Conservation Reserve Program on duck recruitment in the U.S. Prairie Pothole Region","docAbstract":"The U.S. Department of Agriculture (USDA)'s Conservation Reserve Program (CRP) resulted in the conversion of about 1.9 million ha of cropland to perennial grass cover in the Prairie Pothole Region of North Dakota, South Dakota, and northeastern Montana by 1992. Many wildlife managers believed this cover would provide benefits to wildlife, including upland nesting ducks. During 1992-1995, we evaluated success of 5 duck species nesting in CRP fields and nearby Waterfowl Production Areas (WPA) throughout the region. We examined relationships between daily survival rates (DSR) of duck nests in CRP cover and landscape-level habitat and population parameters. We computed DSR of duck nests in other major cover types in our study area from data collected during 1980-1984 (pre-CRP) and 1990-1994 (CRP) periods. We then applied recruitment models to estimate duck production in our study area during peak CRP years (1992-1997) and compared these results with those that simulated the scenario in which cropland was in place of CRP cover (i.e., the CRP had not occurred). DSR were higher in all habitats combined during the CRP period compared to the pre-CRP period. Regressions of DSR in CRP cover on the percent of each study plot in perennial cover and geographic location were significant (P < 0.01) for 4 of 5 duck (Anas spp.) species. Estimated nest success and recruitment rates for the 5 species combined during 1992-1997 were 46% and 30% higher, respectively, with CRP cover on the landscape compared to a scenario where we simulated cropland in place of CRP. Our model estimated an additional 12.4 million recruits from our study area to the fall flight as a consequence of the CRP during 1992-1997. Our results document benefits to 5 duck species in the northern plains associated with a farm program that provided financial incentives to landowners for planting undisturbed grass cover as an alternative to annual crops.","language":"English","publisher":"Wildlife Society","doi":"10.2307/3803027","usgsCitation":"Reynolds, R.E., Shaffer, T.L., Renner, R.W., Newton, W.E., and Batt, B.D., 2001, Impact of the Conservation Reserve Program on duck recruitment in the U.S. Prairie Pothole Region: Journal of Wildlife Management, v. 65, no. 4, p. 765-780, https://doi.org/10.2307/3803027.","productDescription":"15 p.","startPage":"765","endPage":"780","costCenters":[{"id":480,"text":"Northern Prairie Wildlife Research Center","active":true,"usgs":true}],"links":[{"id":129451,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"65","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a04e4b07f02db5f8621","contributors":{"authors":[{"text":"Reynolds, Ronald E.","contributorId":174572,"corporation":false,"usgs":false,"family":"Reynolds","given":"Ronald","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":324380,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Shaffer, Terry L. 0000-0001-6950-8951 tshaffer@usgs.gov","orcid":"https://orcid.org/0000-0001-6950-8951","contributorId":3192,"corporation":false,"usgs":true,"family":"Shaffer","given":"Terry","email":"tshaffer@usgs.gov","middleInitial":"L.","affiliations":[{"id":480,"text":"Northern Prairie Wildlife Research Center","active":true,"usgs":true}],"preferred":true,"id":324382,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Renner, Randy W.","contributorId":174573,"corporation":false,"usgs":false,"family":"Renner","given":"Randy","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":324381,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Newton, Wesley E. 0000-0002-1377-043X wnewton@usgs.gov","orcid":"https://orcid.org/0000-0002-1377-043X","contributorId":3661,"corporation":false,"usgs":true,"family":"Newton","given":"Wesley","email":"wnewton@usgs.gov","middleInitial":"E.","affiliations":[{"id":480,"text":"Northern Prairie Wildlife Research Center","active":true,"usgs":true}],"preferred":true,"id":324379,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Batt, Bruce D.J.","contributorId":113404,"corporation":false,"usgs":false,"family":"Batt","given":"Bruce","email":"","middleInitial":"D.J.","affiliations":[],"preferred":false,"id":324383,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}} ,{"id":70023413,"text":"70023413 - 2001 - Regression models for estimating herbicide concentrations in U.S. streams from watershed characteristics","interactions":[],"lastModifiedDate":"2022-12-21T14:59:29.873017","indexId":"70023413","displayToPublicDate":"2001-01-01T00:00:00","publicationYear":"2001","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2529,"text":"Journal of the American Water Resources Association","active":true,"publicationSubtype":{"id":10}},"title":"Regression models for estimating herbicide concentrations in U.S. streams from watershed characteristics","docAbstract":"Regression models were developed for estimating stream concentrations of the herbicides alachlor, atrazine, cyanazine, metolachlor, and trifluralin from use-intensity data and watershed characteristics. Concentrations were determined from samples collected from 45 streams throughout the United States during 1993 to 1995 as part of the U.S. Geological Survey's National Water-Quality Assessment (NAWQA). Separate regression models were developed for each of six percentiles (10th, 25th, 50th, 75th, 90th, 95th) of the annual distribution of stream concentrations and for the annual time-weighted mean concentration. Estimates for the individual percentiles can be combined to provide an estimate of the annual distribution of concentrations for a given stream. Agricultural use of the herbicide in the watershed was a significant predictor in nearly all of the models. Several hydrologic and soil parameters also were useful in explaining the variability in concentrations of herbicides among the streams. Most of the regression models developed for estimation of concentration percentiles and annual mean concentrations accounted for 50 percent to 90 percent of the variability among streams. Predicted concentrations were nearly always within an order of magnitude of the measured concentrations for the model-development streams, and predicted concentration distributions reasonably matched the actual distributions in most cases. Results from application of the models to streams not included in the model development data set are encouraging, but further validation of the regression approach described in this paper is needed.","language":"English","publisher":"American Water Resources Association","doi":"10.1111/j.1752-1688.2001.tb03644.x","issn":"1093474X","usgsCitation":"Larson, S., and Gilliom, R.J., 2001, Regression models for estimating herbicide concentrations in U.S. streams from watershed characteristics: Journal of the American Water Resources Association, v. 37, no. 5, p. 1349-1367, https://doi.org/10.1111/j.1752-1688.2001.tb03644.x.","productDescription":"19 p.","startPage":"1349","endPage":"1367","costCenters":[],"links":[{"id":232443,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United 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J.","contributorId":60650,"corporation":false,"usgs":true,"family":"Gilliom","given":"R.","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":397587,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70023595,"text":"70023595 - 2001 - Use of passive ambient ozone (O3) samplers in vegetation effects assessment","interactions":[],"lastModifiedDate":"2012-03-12T17:20:10","indexId":"70023595","displayToPublicDate":"2001-01-01T00:00:00","publicationYear":"2001","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1555,"text":"Environmental Pollution","active":true,"publicationSubtype":{"id":10}},"title":"Use of passive ambient ozone (O3) samplers in vegetation effects assessment","docAbstract":"A stochastistic, Weibull probability model was developed and verified to simulate the underlying frequency distributions of hourly ozone (O3) concentrations (exposure dynamics) using the single, weekly mean values obtained from a passive (sodium nitrite absorbent) sampler. The simulation was based on the data derived from a co-located continuous monitor. Although at the moment the model output may be considered as being specific to the elevation and location of the study site, the results were extremely good. This effort for the approximation of the O3 exposure dynamics can be extended to other sites with similar data sets and in developing a generalized understanding of the stochastic O3 exposure-plant response relationships, conferring measurable benefits to the future use of passive O3 samplers, in the absence of continuous monitoring. Copyright ?? 2000 Elsevier Science Ltd.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Environmental Pollution","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/S0269-7491(00)00228-1","issn":"02697491","usgsCitation":"Krupa, S., Nosal, M., and Peterson, D.L., 2001, Use of passive ambient ozone (O3) samplers in vegetation effects assessment: Environmental Pollution, v. 112, no. 3, p. 303-309, https://doi.org/10.1016/S0269-7491(00)00228-1.","startPage":"303","endPage":"309","numberOfPages":"7","costCenters":[],"links":[{"id":207629,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/S0269-7491(00)00228-1"},{"id":232742,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"112","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505bbf56e4b08c986b329ac9","contributors":{"authors":[{"text":"Krupa, S.","contributorId":64847,"corporation":false,"usgs":true,"family":"Krupa","given":"S.","email":"","affiliations":[],"preferred":false,"id":398163,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Nosal, M.","contributorId":57627,"corporation":false,"usgs":true,"family":"Nosal","given":"M.","email":"","affiliations":[],"preferred":false,"id":398162,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Peterson, D. L.","contributorId":36484,"corporation":false,"usgs":true,"family":"Peterson","given":"D.","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":398161,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70023053,"text":"70023053 - 2001 - Forest impact estimated with NOAA AVHRR and landsat TM data related to an empirical hurricane wind-field distribution","interactions":[],"lastModifiedDate":"2012-03-12T17:20:07","indexId":"70023053","displayToPublicDate":"2001-01-01T00:00:00","publicationYear":"2001","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3254,"text":"Remote Sensing of Environment","printIssn":"0034-4257","active":true,"publicationSubtype":{"id":10}},"title":"Forest impact estimated with NOAA AVHRR and landsat TM data related to an empirical hurricane wind-field distribution","docAbstract":"An empirical model was used to relate forest type and hurricane-impact distribution with wind speed and duration to explain the variation of hurricane damage among forest types along the Atchafalaya River basin of coastal Louisiana. Forest-type distribution was derived from Landsat Thematic Mapper image data, hurricane-impact distribution from a suite of transformed advanced very high resolution radiometer images, and wind speed and duration from a wind-field model. The empirical model explained 73%, 84%, and 87% of the impact variances for open, hardwood, and cypress-tupelo forests, respectively. These results showed that the estimated impact for each forest type was highly related to the duration and speed of extreme winds associated with Hurricane Andrew in 1992. The wind-field model projected that the highest wind speeds were in the southern basin, dominated by cypress-tupelo and open forests, while lower wind speeds were in the northern basin, dominated by hardwood forests. This evidence could explain why, on average, the impact to cypress-tupelos was more severe than to hardwoods, even though cypress-tupelos are less susceptible to wind damage. Further, examination of the relative importance of wind speed in explaining the impact severity to each forest type showed that the impact to hardwood forests was mainly related to tropical-depression to tropical-storm force wind speeds. Impacts to cypress-tupelo and open forests (a mixture of willows and cypress-tupelo) were broadly related to tropical-storm force wind speeds and by wind speeds near and somewhat in excess of hurricane force. Decoupling the importance of duration from speed in explaining the impact severity to the forests could not be fully realized. Most evidence, however, hinted that impact severity was positively related to higher durations at critical wind speeds. Wind-speed intervals, which were important in explaining the impact severity on hardwoods, showed that higher durations, but not the highest wind speeds, were concentrated in the northern basin, dominated by hardwoods. The extreme impacts associated with the cypress-tupelo forests in the southeast corner of the basin intersected the highest durations as well as the highest wind speeds. ?? 2001 Published by Elsevier Science Inc.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Remote Sensing of Environment","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/S0034-4257(01)00217-6","issn":"00344257","usgsCitation":"Ramsey, E., Hodgson, M., Sapkota, S., and Nelson, G., 2001, Forest impact estimated with NOAA AVHRR and landsat TM data related to an empirical hurricane wind-field distribution: Remote Sensing of Environment, v. 77, no. 3, p. 279-292, https://doi.org/10.1016/S0034-4257(01)00217-6.","startPage":"279","endPage":"292","numberOfPages":"14","costCenters":[],"links":[{"id":208069,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/S0034-4257(01)00217-6"},{"id":233469,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"77","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a1333e4b0c8380cd54568","contributors":{"authors":[{"text":"Ramsey, Elijah W. III 0000-0002-4518-5796","orcid":"https://orcid.org/0000-0002-4518-5796","contributorId":72769,"corporation":false,"usgs":true,"family":"Ramsey","given":"Elijah W.","suffix":"III","affiliations":[{"id":17705,"text":"Wetland and Aquatic Research Center","active":true,"usgs":true}],"preferred":false,"id":395973,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Hodgson, M.E.","contributorId":21032,"corporation":false,"usgs":true,"family":"Hodgson","given":"M.E.","email":"","affiliations":[],"preferred":false,"id":395971,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Sapkota, S.K.","contributorId":24434,"corporation":false,"usgs":true,"family":"Sapkota","given":"S.K.","email":"","affiliations":[],"preferred":false,"id":395972,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Nelson, G.A.","contributorId":17687,"corporation":false,"usgs":true,"family":"Nelson","given":"G.A.","email":"","affiliations":[],"preferred":false,"id":395970,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70023036,"text":"70023036 - 2001 - A model for lignin alteration - Part II: Numerical model of natural gas generation and application to the Piceance Basin, Western Colorado","interactions":[],"lastModifiedDate":"2012-03-12T17:20:36","indexId":"70023036","displayToPublicDate":"2001-01-01T00:00:00","publicationYear":"2001","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2958,"text":"Organic Geochemistry","active":true,"publicationSubtype":{"id":10}},"title":"A model for lignin alteration - Part II: Numerical model of natural gas generation and application to the Piceance Basin, Western Colorado","docAbstract":"The model presented here simulates a network of parallel and sequential reactions that describe the structural and chemical transformation of lignin-derived sedimentary organic matter (SOM) and the resulting generation of mobile species from shallow burial to approximately low-volatile bituminous rank. The model is calibrated to the Upper Cretaceous Williams Fork Formation coal of the Piceance Basin at the Multi-Well Experiment (MWX) Site, assuming this coal is largely derived from lignin. The model calculates the content of functional groups on the residual molecular species, C, H, and O elemental weight percents of the residual species, and moles of residual molecular species and mobile species (including components of natural gas) through time. The model is generally more sensitive to initial molecular structure of the lignin-derived molecule and the H2O content of the system than to initial temperature, as the former affect the fundamental reaction paths. The model is used to estimate that a total of 314 trillion cubic feet (tcf) of methane is generated by the Williams Fork coal over the basin history. ?? 2001 Elsevier Science Ltd. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Organic Geochemistry","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/S0146-6380(01)00081-X","issn":"01466380","usgsCitation":"Payne, D., and Ortoleva, P., 2001, A model for lignin alteration - Part II: Numerical model of natural gas generation and application to the Piceance Basin, Western Colorado: Organic Geochemistry, v. 32, no. 9, p. 1087-1101, https://doi.org/10.1016/S0146-6380(01)00081-X.","startPage":"1087","endPage":"1101","numberOfPages":"15","costCenters":[],"links":[{"id":208192,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/S0146-6380(01)00081-X"},{"id":233730,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"32","issue":"9","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059e46ae4b0c8380cd4664f","contributors":{"authors":[{"text":"Payne, D.F.","contributorId":15232,"corporation":false,"usgs":true,"family":"Payne","given":"D.F.","email":"","affiliations":[],"preferred":false,"id":395896,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Ortoleva, P.J.","contributorId":59992,"corporation":false,"usgs":true,"family":"Ortoleva","given":"P.J.","email":"","affiliations":[],"preferred":false,"id":395897,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70023731,"text":"70023731 - 2001 - Formation and failure of volcanic debris dams in the Chakachatna River valley associated with eruptions of the Spurr volcanic complex, Alaska","interactions":[],"lastModifiedDate":"2012-03-12T17:20:13","indexId":"70023731","displayToPublicDate":"2001-01-01T00:00:00","publicationYear":"2001","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1801,"text":"Geomorphology","active":true,"publicationSubtype":{"id":10}},"title":"Formation and failure of volcanic debris dams in the Chakachatna River valley associated with eruptions of the Spurr volcanic complex, Alaska","docAbstract":"The formation of lahars and a debris avalanche during Holocene eruptions of the Spurr volcanic complex in south-central Alaska have led to the development of volcanic debris dams in the Chakachatna River valley. Debris dams composed of lahar and debris-avalanche deposits formed at least five times in the last 8000-10,000 years and most recently during eruptions of Crater Peak vent in 1953 and 1992. Water impounded by a large debris avalanche of early Holocene (?) age may have destabilized an upstream glacier-dammed lake causing a catastrophic flood on the Chakachatna River. A large alluvial fan just downstream of the debris-avalanche deposit is strewn with boulders and blocks and is probably the deposit generated by this flood. Application of a physically based dam-break model yields estimates of peak discharge (Qp) attained during failure of the debris-avalanche dam in the range 104 < Qp < 106 m3 s-1 for plausible breach erosion rates of 10-100 m h-1. Smaller, short-lived, lahar dams that formed during historical eruptions in 1953, and 1992, impounded smaller lakes in the upper Chakachatna River valley and peak flows attained during failure of these volcanic debris dams were in the range 103 < Qp < 104 m3 s-1 for plausible breach erosion rates. Volcanic debris dams have formed at other volcanoes in the Cook Inlet region, Aleutian arc, and Wrangell Mountains but apparently did not fail rapidly or result in large or catastrophic outflows. Steep valley topography and frequent eruptions at volcanoes in this region make for significant hazards associated with the formation and failure of volcanic debris dams. Published by Elsevier Science B.V.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Geomorphology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/S0169-555X(00)00097-0","issn":"0169555X","usgsCitation":"Waythomas, C.F., 2001, Formation and failure of volcanic debris dams in the Chakachatna River valley associated with eruptions of the Spurr volcanic complex, Alaska: Geomorphology, v. 39, no. 3-4, p. 111-129, https://doi.org/10.1016/S0169-555X(00)00097-0.","startPage":"111","endPage":"129","numberOfPages":"19","costCenters":[],"links":[{"id":232385,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":207437,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/S0169-555X(00)00097-0"}],"volume":"39","issue":"3-4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a1347e4b0c8380cd545b8","contributors":{"authors":[{"text":"Waythomas, C. F.","contributorId":10065,"corporation":false,"usgs":true,"family":"Waythomas","given":"C.","email":"","middleInitial":"F.","affiliations":[],"preferred":false,"id":398620,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":1002913,"text":"1002913 - 2001 - Life in the fast lane: Fish and foodweb structure in the main channel of large rivers","interactions":[],"lastModifiedDate":"2022-12-21T16:17:07.967066","indexId":"1002913","displayToPublicDate":"2001-01-01T00:00:00","publicationYear":"2001","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2564,"text":"Journal of the North American Benthological Society","onlineIssn":"1937-237X","printIssn":"0887-3593","active":true,"publicationSubtype":{"id":10}},"title":"Life in the fast lane: Fish and foodweb structure in the main channel of large rivers","docAbstract":"We studied the main channel of the lower Illinois River and of the Mississippi River just upstream and downstream of its confluence with the Illinois River to describe the abundance, composition, and/or seasonal appearance of components of the main-channel community. Abundance of fishes in the main channel was high, especially adults. Most adult fishes were present in the main channel for either 3 or 4 seasons/y, indicating that fishes regularly reside in the main channel. We documented abundant zooplankton and benthic invertebrates in the main channel, and the presence of these food types in the diets of channel catfish and freshwater drum. All trophic levels were well represented in the main channel, indicating that the main channel supports a unique food web. The main channel also serves as an important energetic link with other riverine habitats (e.g., floodplains, secondary channels, backwater lakes) because of the mobility of resident fishes and because of the varied energy sources supplying this food web. It may be more realistic to view energy flow in large-river systems as a combination of 3 existing concepts, the river continuum concept (downstream transport), the flood pulse concept (lateral transport to the floodplain), and the riverine productivity model (autochthonous production). We urge additional research to quantify the links between the main channel and other habitat types in large rivers because of the apparent importance of main-channel processes in the overall structure and function of large-river ecosystems.","language":"English","publisher":"University of Chicago Press","publisherLocation":"Zion, IL","doi":"10.2307/1468320","issn":"08873593","usgsCitation":"Dettmers, J., Wahl, D., Soluk, D., and Gutreuter, S., 2001, Life in the fast lane: Fish and foodweb structure in the main channel of large rivers: Journal of the North American Benthological Society, v. 20, no. 2, p. 255-265, https://doi.org/10.2307/1468320.","productDescription":"11 p.","startPage":"255","endPage":"265","costCenters":[{"id":606,"text":"Upper Midwest Environmental Sciences Center","active":true,"usgs":true}],"links":[{"id":133690,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United 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J.M.","contributorId":39724,"corporation":false,"usgs":true,"family":"Dettmers","given":"J.M.","email":"","affiliations":[],"preferred":false,"id":312327,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Wahl, David H.","contributorId":85532,"corporation":false,"usgs":true,"family":"Wahl","given":"David H.","affiliations":[],"preferred":false,"id":312329,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Soluk, D.A.","contributorId":90686,"corporation":false,"usgs":true,"family":"Soluk","given":"D.A.","affiliations":[],"preferred":false,"id":312330,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Gutreuter, S.","contributorId":79829,"corporation":false,"usgs":true,"family":"Gutreuter","given":"S.","email":"","affiliations":[],"preferred":false,"id":312328,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70022743,"text":"70022743 - 2001 - Sex-biased gene flow in spectacled eiders (Anatidae): Inferences from molecular markers with contrasting modes of inheritance","interactions":[],"lastModifiedDate":"2018-08-20T18:20:29","indexId":"70022743","displayToPublicDate":"2001-01-01T00:00:00","publicationYear":"2001","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1598,"text":"Evolution","active":true,"publicationSubtype":{"id":10}},"title":"Sex-biased gene flow in spectacled eiders (Anatidae): Inferences from molecular markers with contrasting modes of inheritance","docAbstract":"Genetic markers that differ in mode of inheritance and rate of evolution (a sex-linked Z-specific microsatellite locus, five biparentally inherited microsatellite loci, and maternally inherited mitochondrial [mtDNA] sequences) were used to evaluate the degree of spatial genetic structuring at macro- and microgeographic scales, among breeding regions and local nesting populations within each region, respectively, for a migratory sea duck species, the spectacled eider (Somateria fisheri). Disjunct and declining breeding populations coupled with sex-specific differences in seasonal migratory patterns and life history provide a series of hypotheses regarding rates and directionality of gene flow among breeding populations from the Indigirka River Delta, Russia, and the North Slope and Yukon-Kuskokwim Delta, Alaska. The degree of differentiation in mtDNA haplotype frequency among breeding regions and populations within regions was high (ϕCT = 0.189, P < 0.01; ϕSC = 0.059, P < 0.01, respectively). Eleven of 17 mtDNA haplotypes were restricted to a single breeding region. Genetic differences among regions were considerably lower for nuclear DNA loci (sex-linked: ϕST = 0.001, P > 0.05; biparentally inherited microsatellites: mean θ = 0.001, P > 0.05) than was observed for mtDNA. Using models explicitly designed for uniparental and biparentally inherited genes, estimates of spatial divergence based on nuclear and mtDNA data together with elements of the species' breeding ecology were used to estimate effective population size and degree of male and female gene flow. Differences in the magnitude and spatial patterns of gene correlations for maternally inherited and nuclear genes revealed that females exhibit greater natal philopatry than do males. Estimates of generational female and male rates of gene flow among breeding regions differed markedly (3.67 × 10−4 and 1.28 × 10−2, respectively). Effective population size for mtDNA was estimated to be at least three times lower than that for biparental genes (30,671 and 101,528, respectively). Large disparities in population sizes among breeding areas greatly reduces the proportion of total genetic variance captured by dispersal, which may accelerate rates of inbreeding (i.e., promote higher coancestries) within populations due to nonrandom pairing of males with females from the same breeding population.
","language":"English","publisher":"Society for the Study of Evolution","doi":"10.1554/0014-3820(2001)055[2105:SBGFIS]2.0.CO;2","issn":"00143820","usgsCitation":"Scribner, K.T., Petersen, M.R., Fields, R.L., Talbot, S.L., Pearce, J.M., and Chesser, R.K., 2001, Sex-biased gene flow in spectacled eiders (Anatidae): Inferences from molecular markers with contrasting modes of inheritance: Evolution, v. 55, no. 10, p. 2105-2115, https://doi.org/10.1554/0014-3820(2001)055[2105:SBGFIS]2.0.CO;2.","productDescription":"11 p.","startPage":"2105","endPage":"2115","costCenters":[{"id":114,"text":"Alaska Science Center","active":true,"usgs":true}],"links":[{"id":233748,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"Russia, United States","state":"Alaska","otherGeospatial":"Bering Sea, Indigirka River Delta, North Slope [Alaska], Yukon-Kuskokwim Delta, Alaska","volume":"55","issue":"10","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b8daee4b08c986b3184d3","contributors":{"authors":[{"text":"Scribner, Kim T.","contributorId":146113,"corporation":false,"usgs":false,"family":"Scribner","given":"Kim","email":"","middleInitial":"T.","affiliations":[{"id":135,"text":"Biological Resources Division","active":false,"usgs":true},{"id":16582,"text":"Department of Fisheries and Wildlife and Department of Zoology, 480 Wilson Rd. 13 Natural Resources Building, Michigan State University, East Lansing, MI 48824","active":true,"usgs":false}],"preferred":false,"id":394743,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Petersen, Margaret R. 0000-0001-6082-3189 mrpetersen@usgs.gov","orcid":"https://orcid.org/0000-0001-6082-3189","contributorId":167729,"corporation":false,"usgs":true,"family":"Petersen","given":"Margaret","email":"mrpetersen@usgs.gov","middleInitial":"R.","affiliations":[{"id":117,"text":"Alaska Science Center Biology WTEB","active":true,"usgs":true}],"preferred":true,"id":394742,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Fields, Raymond L.","contributorId":182354,"corporation":false,"usgs":true,"family":"Fields","given":"Raymond","email":"","middleInitial":"L.","affiliations":[{"id":106,"text":"Alaska Biological Science Center","active":false,"usgs":true}],"preferred":false,"id":394739,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Talbot, Sandra L. 0000-0002-3312-7214 stalbot@usgs.gov","orcid":"https://orcid.org/0000-0002-3312-7214","contributorId":140512,"corporation":false,"usgs":true,"family":"Talbot","given":"Sandra","email":"stalbot@usgs.gov","middleInitial":"L.","affiliations":[{"id":114,"text":"Alaska Science Center","active":true,"usgs":true},{"id":117,"text":"Alaska Science Center Biology WTEB","active":true,"usgs":true}],"preferred":true,"id":394741,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Pearce, John M. 0000-0002-8503-5485 jpearce@usgs.gov","orcid":"https://orcid.org/0000-0002-8503-5485","contributorId":181766,"corporation":false,"usgs":true,"family":"Pearce","given":"John","email":"jpearce@usgs.gov","middleInitial":"M.","affiliations":[{"id":117,"text":"Alaska Science Center Biology WTEB","active":true,"usgs":true},{"id":114,"text":"Alaska Science Center","active":true,"usgs":true}],"preferred":true,"id":394744,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Chesser, Ronald K.","contributorId":113098,"corporation":false,"usgs":true,"family":"Chesser","given":"Ronald","email":"","middleInitial":"K.","affiliations":[],"preferred":false,"id":394740,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}} ,{"id":70023062,"text":"70023062 - 2001 - Predictive modeling of flow and transport in a two‐dimensional intermediate‐scale, heterogeneous porous medium","interactions":[],"lastModifiedDate":"2018-03-27T17:09:41","indexId":"70023062","displayToPublicDate":"2001-01-01T00:00:00","publicationYear":"2001","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3722,"text":"Water Resources Research","onlineIssn":"1944-7973","printIssn":"0043-1397","active":true,"publicationSubtype":{"id":10}},"title":"Predictive modeling of flow and transport in a two‐dimensional intermediate‐scale, heterogeneous porous medium","docAbstract":"As a first step toward understanding the role of sedimentary structures in flow and transport through porous media, this work deterministically examines how small‐scale laboratory‐measured values of hydraulic conductivity relate to in situ values of simple, artificial structures in an intermediate‐scale (10 m long), two‐dimensional, heterogeneous, laboratory experiment. Results were judged based on how well simulations using measured values of hydraulic conductivities matched measured hydraulic heads, net flow, and transport through the tank. Discrepancies were investigated using sensitivity analysis and nonlinear regression estimates of the in situ hydraulic conductivity that produce the best fit to measured hydraulic heads and net flow. Permeameter and column experiments produced laboratory measurements of hydraulic conductivity for each of the sands used in the intermediate‐scale experiments. Despite explicit numerical representation of the heterogeneity the laboratory‐measured values underestimated net flow by 12–14% and were distinctly smaller than the regression‐estimated values. The significance of differences in measured hydraulic conductivity values was investigated by comparing variability of transport predictions using the different measurement methods to that produced by different realizations of the heterogeneous distribution. Results indicate that the variations in measured hydraulic conductivity were more important to transport than variations between realizations of the heterogeneous distribution of hydraulic conductivity.
","language":"English","publisher":"American Geophysical Union","doi":"10.1029/2001WR000242","usgsCitation":"Barth, G.R., Hill, M.C., Illangasekare, T.H., and Rajaram, H., 2001, Predictive modeling of flow and transport in a two‐dimensional intermediate‐scale, heterogeneous porous medium: Water Resources Research, v. 37, no. 10, p. 2503-2512, https://doi.org/10.1029/2001WR000242.","productDescription":"10 p.","startPage":"2503","endPage":"2512","costCenters":[],"links":[{"id":478911,"rank":1,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1029/2001wr000242","text":"Publisher Index Page"},{"id":233621,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"37","issue":"10","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a8201e4b0c8380cd7b849","contributors":{"authors":[{"text":"Barth, Gilbert R.","contributorId":15374,"corporation":false,"usgs":false,"family":"Barth","given":"Gilbert","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":396004,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Hill, Mary C. mchill@usgs.gov","contributorId":974,"corporation":false,"usgs":true,"family":"Hill","given":"Mary","email":"mchill@usgs.gov","middleInitial":"C.","affiliations":[{"id":5044,"text":"National Research Program - Central Branch","active":true,"usgs":true}],"preferred":true,"id":396007,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Illangasekare, Tissa H.","contributorId":194933,"corporation":false,"usgs":false,"family":"Illangasekare","given":"Tissa","email":"","middleInitial":"H.","affiliations":[],"preferred":false,"id":396006,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Rajaram, Harihar","contributorId":194934,"corporation":false,"usgs":false,"family":"Rajaram","given":"Harihar","email":"","affiliations":[],"preferred":false,"id":396005,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70023248,"text":"70023248 - 2001 - A two-dimensional, time-dependent model of suspended sediment transport and bed reworking for continental shelves","interactions":[],"lastModifiedDate":"2012-03-12T17:20:04","indexId":"70023248","displayToPublicDate":"2001-01-01T00:00:00","publicationYear":"2001","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1315,"text":"Computers & Geosciences","printIssn":"0098-3004","active":true,"publicationSubtype":{"id":10}},"title":"A two-dimensional, time-dependent model of suspended sediment transport and bed reworking for continental shelves","docAbstract":"A two-dimensional, time-dependent solution to the transport equation is formulated to account for advection and diffusion of sediment suspended in the bottom boundary layer of continental shelves. This model utilizes a semi-implicit, upwind-differencing scheme to solve the advection-diffusion equation across a two-dimensional transect that is configured so that one dimension is the vertical, and the other is a horizontal dimension usually aligned perpendicular to shelf bathymetry. The model calculates suspended sediment concentration and flux; and requires as input wave properties, current velocities, sediment size distributions, and hydrodynamic sediment properties. From the calculated two-dimensional suspended sediment fluxes, we quantify the redistribution of shelf sediment, bed erosion, and deposition for several sediment sizes during resuspension events. The two-dimensional, time-dependent approach directly accounts for cross-shelf gradients in bed shear stress and sediment properties, as well as transport that occurs before steady-state suspended sediment concentrations have been attained. By including the vertical dimension in the calculations, we avoid depth-averaging suspended sediment concentrations and fluxes, and directly account for differences in transport rates and directions for fine and coarse sediment in the bottom boundary layer. A flux condition is used as the bottom boundary condition for the transport equation in order to capture time-dependence of the suspended sediment field. Model calculations demonstrate the significance of both time-dependent and spatial terms on transport and depositional patterns on continental shelves. ?? 2001 Elsevier Science Ltd. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Computers and Geosciences","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/S0098-3004(00)00122-9","issn":"00983004","usgsCitation":"Harris, C.K., and Wiberg, P., 2001, A two-dimensional, time-dependent model of suspended sediment transport and bed reworking for continental shelves: Computers & Geosciences, v. 27, no. 6, p. 675-690, https://doi.org/10.1016/S0098-3004(00)00122-9.","startPage":"675","endPage":"690","numberOfPages":"16","costCenters":[],"links":[{"id":207372,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/S0098-3004(00)00122-9"},{"id":232275,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"27","issue":"6","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059e608e4b0c8380cd47101","contributors":{"authors":[{"text":"Harris, C. K.","contributorId":80337,"corporation":false,"usgs":true,"family":"Harris","given":"C.","email":"","middleInitial":"K.","affiliations":[],"preferred":false,"id":397014,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Wiberg, P.L.","contributorId":33827,"corporation":false,"usgs":true,"family":"Wiberg","given":"P.L.","email":"","affiliations":[],"preferred":false,"id":397013,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70023249,"text":"70023249 - 2001 - Toward linking maize chemistry to archaeological agricultural sites in the North American Southwest","interactions":[],"lastModifiedDate":"2018-02-15T12:50:04","indexId":"70023249","displayToPublicDate":"2001-01-01T00:00:00","publicationYear":"2001","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2182,"text":"Journal of Archaeological Science","active":true,"publicationSubtype":{"id":10}},"title":"Toward linking maize chemistry to archaeological agricultural sites in the North American Southwest","docAbstract":"Maize (Zea mays L.) was the staple domestic food crop for Ancestral Pueblo people throughout the northern American Southwest. It is thought to have been the basic food of the inhabitants of Chaco Canyon. New Mexico, a location that was a major centre of Ancestral Pueblo building and population during the 11th and early 12th centuries AD. Modern heirloom varieties of Native American corn have been difficult to grow in experimental fields in Chaco Canyon. Given an abundance of apparent storage structures in Chacoan buildings, it is possible that some corn recovered from archaeological contexts, was imported from surrounding areas. The ultimate goal of this research is to determine whether the corn in Chaco Canyon was grown locally or imported. This paper establishes the feasibility of a method to accomplish this goal. This study reports the results of using inductively coupled plasma-mass spectrometric (ICP-MS) instrumentation to determine chemical constituents of experimental fields and modern heirloom varieties of Native American corn. Analysis of 19 elements is adequate to differentiate soil and corn from three field areas. These results are promising: however, a number of problems, including post-depositional alterations in maize, remain to be solved. ?? 2001 Academic Press.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Archaeological Science","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1006/jasc.2001.0598","issn":"03054403","usgsCitation":"Cordell, L., Durand, S., Antweiler, R.C., and Taylor, H.E., 2001, Toward linking maize chemistry to archaeological agricultural sites in the North American Southwest: Journal of Archaeological Science, v. 28, no. 5, p. 501-513, https://doi.org/10.1006/jasc.2001.0598.","startPage":"501","endPage":"513","numberOfPages":"13","costCenters":[],"links":[{"id":232276,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":207373,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1006/jasc.2001.0598"}],"volume":"28","issue":"5","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505bb5b8e4b08c986b32685e","contributors":{"authors":[{"text":"Cordell, L.S.","contributorId":63569,"corporation":false,"usgs":true,"family":"Cordell","given":"L.S.","email":"","affiliations":[],"preferred":false,"id":397017,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Durand, S.R.","contributorId":87315,"corporation":false,"usgs":true,"family":"Durand","given":"S.R.","email":"","affiliations":[],"preferred":false,"id":397018,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Antweiler, Ronald C. 0000-0001-5652-6034 antweil@usgs.gov","orcid":"https://orcid.org/0000-0001-5652-6034","contributorId":1481,"corporation":false,"usgs":true,"family":"Antweiler","given":"Ronald","email":"antweil@usgs.gov","middleInitial":"C.","affiliations":[{"id":5044,"text":"National Research Program - Central Branch","active":true,"usgs":true}],"preferred":true,"id":397016,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Taylor, Howard E. hetaylor@usgs.gov","contributorId":1551,"corporation":false,"usgs":true,"family":"Taylor","given":"Howard","email":"hetaylor@usgs.gov","middleInitial":"E.","affiliations":[{"id":5044,"text":"National Research Program - Central Branch","active":true,"usgs":true}],"preferred":true,"id":397015,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70022824,"text":"70022824 - 2001 - Evidence and characteristics of hydrolytic disproportionation of organic matter during metasomatic processes","interactions":[],"lastModifiedDate":"2012-03-12T17:20:06","indexId":"70022824","displayToPublicDate":"2001-01-01T00:00:00","publicationYear":"2001","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1759,"text":"Geochimica et Cosmochimica Acta","active":true,"publicationSubtype":{"id":10}},"title":"Evidence and characteristics of hydrolytic disproportionation of organic matter during metasomatic processes","docAbstract":"Petroleum-geochemical analyses of carbonaceous regionally metamorphosed rocks, carbonaceous rocks from ore deposits, and alkalic plutonic rocks from diverse settings, demonstrated the presence of very low to moderately low concentrations of solvent-extractable organic matter, this observation in spite of the fact that some of these rocks were exposed to extremely high metamorphic temperatures. Biomarker and ??13C analyses established that the extractable organic matter originated as sedimentary-derived hydrocarbons. However, the chemistry of the extractable bitumen has been fundamentally transformed from that found in sediment bitumen and oils. Asphaltenes and resins, as defined in the normal petroleum-geochemical sense, are completely missing. The principal aromatic hydrocarbons present in oils and sediment bitumens (especially the methylated naphthalenes) are either in highly reduced concentrations or are missing altogether, Instead, aromatic hydrocarbons typical of sediment bitumens and oils are very minor, and a number of unidentified compounds and oxygen-bearing compounds are dominant. Relatively high concentrations of alkylated benzenes are typical. The polar \"resin\" fraction, eluted during column chromatography, is the principal compound group, by weight, being composed of six to eight dominant peaks present in all samples, despite the great geologic diversity of the samples. These, and other, observations suggest that a strong drive towards equilibrium exists in the \"bitumen.\" Gas chromatograms of the saturated hydrocarbons commonly have a pronounced hump in both the n-paraffins and naphthenes, centered near the C19 to C26 carbon numbers, and a ubiquitos minimum in the n-paraffin distribution near n-C12 to n-C14. Multiple considerations dictate that the bitumen in the samples is indigenous and did not originate from either surficial field contamination or from laboratory procedures. Our observations are consistent with the hydrolytic disproportion of organic matter (HDOM), in which water and organic matter, including hydrocarbons, easily exchange hydrogen or oxygen with one another under certain conditions (Helgeson et al., 1993). The process appears to take place via well-known organic-chemical redox reaction pathways and is most evident in open-fluid systems. The conclusion that HDOM took place in the analyzed samples, thus producing the chemistry of the extractable bitumen, is supported by numerous previously published organic-geochemical studies of metamorphic, volcanic, plutonic, and ore-deposit-related rocks by other investigators. HDOM is suggested as an unrecognized geologic agent of fundamental importance. The process appears to control major chemical reactions in diverse geologic environments including, but not limited to, petroleum geology and geochemistry, regional metamorphism, and base- and precious-metal ore deposition. Copyright ?? 2001 Elsevier Science Ltd.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Geochimica et Cosmochimica Acta","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/S0016-7037(01)00762-1","issn":"00167037","usgsCitation":"Price, L., and Dewitt, E., 2001, Evidence and characteristics of hydrolytic disproportionation of organic matter during metasomatic processes: Geochimica et Cosmochimica Acta, v. 65, no. 21, p. 3791-3826, https://doi.org/10.1016/S0016-7037(01)00762-1.","startPage":"3791","endPage":"3826","numberOfPages":"36","costCenters":[],"links":[{"id":208009,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/S0016-7037(01)00762-1"},{"id":233354,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"65","issue":"21","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0d27e4b0c8380cd52e40","contributors":{"authors":[{"text":"Price, L.C.","contributorId":48575,"corporation":false,"usgs":true,"family":"Price","given":"L.C.","email":"","affiliations":[],"preferred":false,"id":395030,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Dewitt, E.","contributorId":108257,"corporation":false,"usgs":true,"family":"Dewitt","given":"E.","email":"","affiliations":[],"preferred":false,"id":395031,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70023251,"text":"70023251 - 2001 - Using absolute gravimeter data to determine vertical gravity gradients","interactions":[],"lastModifiedDate":"2012-03-12T17:20:04","indexId":"70023251","displayToPublicDate":"2001-01-01T00:00:00","publicationYear":"2001","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2718,"text":"Metrologia","active":true,"publicationSubtype":{"id":10}},"title":"Using absolute gravimeter data to determine vertical gravity gradients","docAbstract":"The position versus time data from a free-fall absolute gravimeter can be used to estimate the vertical gravity gradient in addition to the gravity value itself. Hipkin has reported success in estimating the vertical gradient value using a data set of unusually good quality. This paper explores techniques that may be applicable to a broader class of data that may be contaminated with \"system response\" errors of larger magnitude than were evident in the data used by Hipkin. This system response function is usually modelled as a sum of exponentially decaying sinusoidal components. The technique employed here involves combining the x0, v0 and g parameters from all the drops made during a site occupation into a single least-squares solution, and including the value of the vertical gradient and the coefficients of system response function in the same solution. The resulting non-linear equations must be solved iteratively and convergence presents some difficulties. Sparse matrix techniques are used to make the least-squares problem computationally tractable.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Metrologia","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1088/0026-1394/38/2/6","issn":"00261394","usgsCitation":"Robertson, D., 2001, Using absolute gravimeter data to determine vertical gravity gradients: Metrologia, v. 38, no. 2, p. 147-153, https://doi.org/10.1088/0026-1394/38/2/6.","startPage":"147","endPage":"153","numberOfPages":"7","costCenters":[],"links":[{"id":207397,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1088/0026-1394/38/2/6"},{"id":232315,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"38","issue":"2","noUsgsAuthors":false,"publicationDate":"2003-03-05","publicationStatus":"PW","scienceBaseUri":"505bc02ae4b08c986b329f7d","contributors":{"authors":[{"text":"Robertson, D.S.","contributorId":74167,"corporation":false,"usgs":true,"family":"Robertson","given":"D.S.","email":"","affiliations":[],"preferred":false,"id":397022,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":1008381,"text":"1008381 - 2001 - Pesticides and amphibian declines in California, USA","interactions":[],"lastModifiedDate":"2022-10-12T16:45:59.66191","indexId":"1008381","displayToPublicDate":"2001-01-01T00:00:00","publicationYear":"2001","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1571,"text":"Environmental Toxicology and Chemistry","active":true,"publicationSubtype":{"id":10}},"title":"Pesticides and amphibian declines in California, USA","docAbstract":"Several species of anuran amphibians have undergone drastic population declines in the western United States over the last 10 to 15 years. In California, the most severe declines are in the Sierra Mountains east of the Central Valley and downwind of the intensely agricultural San Joaquin Valley. In contrast, coastal and more northern populations across from the less agrarian Sacramento Valley are stable or declining less precipitously. In this article, we provide evidence that pesticides are instrumental in declines of these species. Using Hyla regilla as a sentinel species, we found that cholinesterase (ChE) activity in tadpoles was depressed in mountainous areas east of the Central Valley compared with sites along the coast or north of the Valley. Cholinesterase was also lower in areas where ranid population status was poor or moderate compared with areas with good ranid status. Up to 50% of the sampled population in areas with reduced ChE had detectable organophosphorus residues, with concentrations as high as 190 ppb wet weight. In addition, up to 86% of some populations had measurable endosulfan concentrations and 40% had detectable 4,4′-dichlorodiphenyldichloroethylene, 4,4′-DDT, and 2,4′-DDT residues.
","language":"English","publisher":"Society of Environmental Toxicology and Chemistry","doi":"10.1002/etc.5620200725","usgsCitation":"Sparling, D.W., Fellers, G.M., and McConnell, L., 2001, Pesticides and amphibian declines in California, USA: Environmental Toxicology and Chemistry, v. 20, no. 7, p. 1591-1595, https://doi.org/10.1002/etc.5620200725.","productDescription":"5 p.","startPage":"1591","endPage":"1595","costCenters":[{"id":651,"text":"Western Ecological Research Center","active":true,"usgs":true}],"links":[{"id":478992,"rank":1,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.529.9781","text":"External Repository"},{"id":130806,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"California","otherGeospatial":"Lassen Volcanic National Park, Sequoia National Park, Yosemite National Park","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -123.06884765625,\n 37.77071473849609\n ],\n [\n -122.288818359375,\n 37.77071473849609\n ],\n [\n -122.288818359375,\n 38.212288054388175\n ],\n [\n -123.06884765625,\n 38.212288054388175\n ],\n [\n -123.06884765625,\n 37.77071473849609\n ]\n ]\n ]\n }\n },\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -120.970458984375,\n 34.985003130171066\n ],\n [\n -120.22338867187499,\n 34.985003130171066\n ],\n [\n -120.22338867187499,\n 35.44277092585766\n ],\n [\n -120.970458984375,\n 35.44277092585766\n ],\n [\n -120.970458984375,\n 34.985003130171066\n ]\n ]\n ]\n }\n },\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -119.15222167968751,\n 36.266421331439375\n ],\n [\n -118.02612304687499,\n 36.266421331439375\n ],\n [\n -118.02612304687499,\n 36.83127162140714\n ],\n [\n -119.15222167968751,\n 36.83127162140714\n ],\n [\n -119.15222167968751,\n 36.266421331439375\n ]\n ]\n ]\n }\n },\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -120.02014160156249,\n 37.496652341233364\n ],\n [\n -119.05334472656249,\n 37.496652341233364\n ],\n [\n -119.05334472656249,\n 38.31149091244452\n ],\n [\n -120.02014160156249,\n 38.31149091244452\n ],\n [\n -120.02014160156249,\n 37.496652341233364\n ]\n ]\n ]\n }\n },\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -122.1514892578125,\n 39.88866516883713\n ],\n [\n -120.44311523437499,\n 39.88866516883713\n ],\n [\n -120.44311523437499,\n 40.9218144123785\n ],\n [\n -122.1514892578125,\n 40.9218144123785\n ],\n [\n -122.1514892578125,\n 39.88866516883713\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"20","issue":"7","noUsgsAuthors":false,"publicationDate":"2001-07-01","publicationStatus":"PW","scienceBaseUri":"4f4e4ae0e4b07f02db68833c","contributors":{"authors":[{"text":"Sparling, Donald W.","contributorId":7220,"corporation":false,"usgs":true,"family":"Sparling","given":"Donald","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":317587,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Fellers, Gary M. 0000-0003-4092-0285 gary_fellers@usgs.gov","orcid":"https://orcid.org/0000-0003-4092-0285","contributorId":3150,"corporation":false,"usgs":true,"family":"Fellers","given":"Gary","email":"gary_fellers@usgs.gov","middleInitial":"M.","affiliations":[{"id":651,"text":"Western Ecological Research Center","active":true,"usgs":true}],"preferred":true,"id":317586,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"McConnell, Laura","contributorId":57411,"corporation":false,"usgs":true,"family":"McConnell","given":"Laura","affiliations":[],"preferred":false,"id":317588,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70022718,"text":"70022718 - 2001 - Simulation of a semi-permanent wetland basin in the Cottonwood Lake area, east-central North Dakota","interactions":[],"lastModifiedDate":"2012-03-12T17:20:37","indexId":"70022718","displayToPublicDate":"2001-01-01T00:00:00","publicationYear":"2001","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Simulation of a semi-permanent wetland basin in the Cottonwood Lake area, east-central North Dakota","docAbstract":"A coupled surface/subsurface hydrologic model was developed to examine the effects of climatic conditions on stage fluctuations within a semi-permanent wetland located in the Prairie Pothole region of east-central North Dakota. Model calibration was accomplished using data collected from 1981 to 1996 to encompass extreme climatic conditions. Results show that the processes of precipitation largely control wetland stage. Surface runoff produces short duration, high magnitude flows typically associated with spring thaw. On the other hand, groundwater contribution provides flows smaller in magnitude but higher in duration and these become increasingly important with respect to wetland stage during extended periods of drought and flood. Peak groundwater fluxes lag one-to-two months behind peak recharge rates and therefore occur predominantly during the month of June. Groundwater fluxes then attenuate slowly for the remainder of the year to the point where water may move out of the wetland and into the underlying aquifer during the fall and winter months. Despite an over simplification of the complex groundwater component of the wetland system it was found that this modeling approach was able to predict system response over 15 years, under extreme climatic conditions and with relatively easily attainable data input.","largerWorkTitle":"Proceedings of the 2001 Wetlands Engineering and River Restoration Conference","conferenceTitle":"Proceedings of the 2001 Wetlands Engineering and River Restoration Conference","conferenceDate":"27 August 2001 through 31 August 2001","conferenceLocation":"Reno, NV","language":"English","isbn":"0784405816","usgsCitation":"Carroll, R., Pohll, G., Tracy, J., and Winter, T.C., 2001, Simulation of a semi-permanent wetland basin in the Cottonwood Lake area, east-central North Dakota, in Proceedings of the 2001 Wetlands Engineering and River Restoration Conference, Reno, NV, 27 August 2001 through 31 August 2001, p. 1341-1351.","startPage":"1341","endPage":"1351","numberOfPages":"11","costCenters":[],"links":[{"id":233886,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b900ce4b08c986b3192bb","contributors":{"editors":[{"text":"Hayes D.F.Hayes D.F.","contributorId":128356,"corporation":true,"usgs":false,"organization":"Hayes D.F.Hayes D.F.","id":536483,"contributorType":{"id":2,"text":"Editors"},"rank":1}],"authors":[{"text":"Carroll, R.W.H.","contributorId":86148,"corporation":false,"usgs":true,"family":"Carroll","given":"R.W.H.","email":"","affiliations":[],"preferred":false,"id":394651,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Pohll, G.M.","contributorId":65261,"corporation":false,"usgs":true,"family":"Pohll","given":"G.M.","email":"","affiliations":[],"preferred":false,"id":394650,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Tracy, J.C.","contributorId":21734,"corporation":false,"usgs":true,"family":"Tracy","given":"J.C.","email":"","affiliations":[],"preferred":false,"id":394648,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Winter, T. C.","contributorId":23485,"corporation":false,"usgs":true,"family":"Winter","given":"T.","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":394649,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70022994,"text":"70022994 - 2001 - Tests of peak flow scaling in simulated self-similar river networks","interactions":[],"lastModifiedDate":"2012-03-12T17:20:36","indexId":"70022994","displayToPublicDate":"2001-01-01T00:00:00","publicationYear":"2001","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":664,"text":"Advances in Water Resources","active":true,"publicationSubtype":{"id":10}},"title":"Tests of peak flow scaling in simulated self-similar river networks","docAbstract":"The effect of linear flow routing incorporating attenuation and network topology on peak flow scaling exponent is investigated for an instantaneously applied uniform runoff on simulated deterministic and random self-similar channel networks. The flow routing is modelled by a linear mass conservation equation for a discrete set of channel links connected in parallel and series, and having the same topology as the channel network. A quasi-analytical solution for the unit hydrograph is obtained in terms of recursion relations. The analysis of this solution shows that the peak flow has an asymptotically scaling dependence on the drainage area for deterministic Mandelbrot-Vicsek (MV) and Peano networks, as well as for a subclass of random self-similar channel networks. However, the scaling exponent is shown to be different from that predicted by the scaling properties of the maxima of the width functions. ?? 2001 Elsevier Science Ltd. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Advances in Water Resources","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/S0309-1708(01)00043-4","issn":"03091708","usgsCitation":"Menabde, M., Veitzer, S., Gupta, V., and Sivapalan, M., 2001, Tests of peak flow scaling in simulated self-similar river networks: Advances in Water Resources, v. 24, no. 9-10, p. 991-999, https://doi.org/10.1016/S0309-1708(01)00043-4.","startPage":"991","endPage":"999","numberOfPages":"9","costCenters":[],"links":[{"id":208155,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/S0309-1708(01)00043-4"},{"id":233654,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"24","issue":"9-10","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505ba5e0e4b08c986b320d41","contributors":{"authors":[{"text":"Menabde, M.","contributorId":10202,"corporation":false,"usgs":true,"family":"Menabde","given":"M.","email":"","affiliations":[],"preferred":false,"id":395736,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Veitzer, S.","contributorId":107890,"corporation":false,"usgs":true,"family":"Veitzer","given":"S.","affiliations":[],"preferred":false,"id":395739,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Gupta, V.","contributorId":10959,"corporation":false,"usgs":false,"family":"Gupta","given":"V.","email":"","affiliations":[],"preferred":false,"id":395737,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Sivapalan, M.","contributorId":59587,"corporation":false,"usgs":true,"family":"Sivapalan","given":"M.","email":"","affiliations":[],"preferred":false,"id":395738,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70023561,"text":"70023561 - 2001 - Geology, coal quality, and resources of the Antaramut-Kurtan-Dzoragukh coal field, north-central Armenia","interactions":[],"lastModifiedDate":"2012-03-12T17:20:01","indexId":"70023561","displayToPublicDate":"2001-01-01T00:00:00","publicationYear":"2001","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2033,"text":"International Journal of Coal Geology","active":true,"publicationSubtype":{"id":10}},"title":"Geology, coal quality, and resources of the Antaramut-Kurtan-Dzoragukh coal field, north-central Armenia","docAbstract":"The Antaramut-Kurta-Dzoragukh (AKD) coal deposit is a previously unrecognized coal field in north-central Armenia. Coal has been known to exist in the general vicinity since the turn of the century, but coal was thought to be restricted to a small (1 km2) area only near the village of Antaramut. However, through detailed field work and exploratory drilling, this coal deposit has been expanded to at least 20 km2, and thus renamed the Antaramut-Kurtan-Dzoragukh coal field, for the three villages that the coal field encompasses. The entire coal-bearing horizon, a series of tuffaceous sandstones, siltstones, and claystones, is approximately 50 m thick. The AKD coal field contains two coal beds, each greater than 1 m thick, and numerous small rider beds, with a total resource of approximately 31,000,000 metric tonnes. The coals are late Eocene in age, high volatile bituminous in rank, relatively high in ash yield (approximately 40%, as-determined basis) and moderate in sulfur content (approximately 3%, as-determined basis). The two coal beds (No. 1 and No. 2), on a moist, mineral-matter-free basis, have high calorific values of 32.6 MJ/kg (7796 cal/g) and 36.0 MJ/kg (8599 cal/g), respectively. Coal is one of the few indigenous fossil fuel resources occurring in Armenia and thus, the AKD coal field could potentially provide fuel for heating and possibly energy generation in the Armenian energy budget. Published by Elsevier Science B.V.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"International Journal of Coal Geology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/S0166-5162(00)00039-2","issn":"01665162","usgsCitation":"Pierce, B., Martirosyan, A., Malkhasian, G., Harutunian, S., and Harutunian, G., 2001, Geology, coal quality, and resources of the Antaramut-Kurtan-Dzoragukh coal field, north-central Armenia: International Journal of Coal Geology, v. 45, no. 4, p. 267-279, https://doi.org/10.1016/S0166-5162(00)00039-2.","startPage":"267","endPage":"279","numberOfPages":"13","costCenters":[],"links":[{"id":207324,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/S0166-5162(00)00039-2"},{"id":232177,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"45","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a272fe4b0c8380cd59672","contributors":{"authors":[{"text":"Pierce, B.S.","contributorId":13639,"corporation":false,"usgs":true,"family":"Pierce","given":"B.S.","email":"","affiliations":[],"preferred":false,"id":398041,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Martirosyan, A.","contributorId":18139,"corporation":false,"usgs":true,"family":"Martirosyan","given":"A.","email":"","affiliations":[],"preferred":false,"id":398042,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Malkhasian, G.","contributorId":21727,"corporation":false,"usgs":true,"family":"Malkhasian","given":"G.","affiliations":[],"preferred":false,"id":398043,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Harutunian, S.","contributorId":81665,"corporation":false,"usgs":true,"family":"Harutunian","given":"S.","email":"","affiliations":[],"preferred":false,"id":398045,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Harutunian, G.","contributorId":64842,"corporation":false,"usgs":true,"family":"Harutunian","given":"G.","email":"","affiliations":[],"preferred":false,"id":398044,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}} ,{"id":70023237,"text":"70023237 - 2001 - Local site effects and dynamic soil behavior","interactions":[],"lastModifiedDate":"2012-03-12T17:20:13","indexId":"70023237","displayToPublicDate":"2001-01-01T00:00:00","publicationYear":"2001","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3418,"text":"Soil Dynamics and Earthquake Engineering","active":true,"publicationSubtype":{"id":10}},"title":"Local site effects and dynamic soil behavior","docAbstract":"Amplitudes of seismic waves increase significantly as they pass through soft soil layers near the earth's surface. This phenomenon, commonly known as site amplification, is a major factor influencing the extent of damage on structures. It is crucial that site amplification is accounted for when designing structures on soft soils. The characteristics of site amplification at a given site can be estimated by analytical models, as well as field tests. Analytical models require as inputs the geometry of all soil layers from surface to bedrock, their dynamic properties (e.g. density, wave velocity, damping), and the incident bedrock motions. Field tests involve recording and analyzing the dynamic response of sites to artificial excitations, ambient forces, and actual earthquakes. The most reliable estimates of site amplification are obtained by analyzing the recorded motions of the site during strong earthquakes. This paper presents a review of the types and the generating mechanisms of site amplification, and the models and methods that are used to characterize them from earthquake records. ?? 2001 Published by Elsevier Science Ltd.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Soil Dynamics and Earthquake Engineering","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/S0267-7261(01)00021-5","issn":"02677261","usgsCitation":"Afak, E., 2001, Local site effects and dynamic soil behavior: Soil Dynamics and Earthquake Engineering, v. 21, no. 5, p. 453-458, https://doi.org/10.1016/S0267-7261(01)00021-5.","startPage":"453","endPage":"458","numberOfPages":"6","costCenters":[],"links":[{"id":207616,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/S0267-7261(01)00021-5"},{"id":232719,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"21","issue":"5","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a48e5e4b0c8380cd681e5","contributors":{"authors":[{"text":"Afak, E.","contributorId":46729,"corporation":false,"usgs":true,"family":"Afak","given":"E.","email":"","affiliations":[],"preferred":false,"id":396960,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70023279,"text":"70023279 - 2001 - Ocean Drilling Program Leg 178 (Antarctic Peninsula): Sedimentology of glacially influenced continental margin topsets and foresets","interactions":[],"lastModifiedDate":"2012-03-12T17:19:59","indexId":"70023279","displayToPublicDate":"2001-01-01T00:00:00","publicationYear":"2001","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2667,"text":"Marine Geology","active":true,"publicationSubtype":{"id":10}},"title":"Ocean Drilling Program Leg 178 (Antarctic Peninsula): Sedimentology of glacially influenced continental margin topsets and foresets","docAbstract":"Ocean Drilling Program Leg 178 (February-April 1998) drilled two sites (Sites 1097 and 1103) on the outer Antarctic Peninsula Pacific continental shelf. Recovered strata are no older than late Miocene or early Pliocene (<4.6 Ma). Recovery at shallow depths in loosely consolidated and iceberg-turbated bouldery sediment was poor but improved with increasing depth and consolidation to allow description of lithofacies and biofacies and interpretation of depositional environment. Site 1097 lies on the outer shelf within Marguerite Trough which is a major outlet for ice expanding seaward from the Antarctic Peninsula and reached a maximum depth drilled of 436.6 m below the sea floor (mbsf). Seismic stratigraphic data show flat-lying upper strata resting on strata that dip gently seaward. Uppermost strata, to a depth of 150 mbsf, were poorly recovered, but data suggest they consist of diamictites containing reworked and abraded marine microfauna. This interval is interpreted as having been deposited largely as till produced by subglacial cannibalization of marine sediments (deformation till) recording ice sheet expansion across the shelf. Underlying gently dipping strata show massive, stratified and graded diamictite facies with common bioturbation and slump stuctures that are interbedded with laminated and massive mudstones with dropstones. The succession contains a well-preserved in situ marine microfauna typical of open marine and proglacial marine environments. The lower gently dipping succession at Site 1097 is interpreted as a complex of sediment gravity flows formed of poorly sorted glacial debris. Site 1103 was drilled in that part of the continental margin that shows uppermost flat-lying continental shelf topsets overlying steeper dipping slope foresets seaward of a structural mid-shelf high. Drilling reached a depth of 363 mbsf with good recovery in steeply dipping continental slope foreset strata. Foreset strata are dominated by massive and chaotically stratified diamictites interbedded with massive and graded sandstones and mudstones. The sedimentary record and seismic stratigraphy is consistent with deposition on a continental slope from debris flows and turbidity currents released from a glacial source. Data from Sites 1097 and 1103 suggest the importance of aggradation of the Antarctic Peninsula continental shelf by tilt deposition and progradation of the slope by mass flow. This may provide a model for the interpretation of Palaeozoic and Proterozoic glacial successions that accumulated on glacially influenced continental margins.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Marine Geology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/S0025-3227(01)00184-0","issn":"00253227","usgsCitation":"Eyles, N., Daniels, J., Osterman, L., and Januszczak, N., 2001, Ocean Drilling Program Leg 178 (Antarctic Peninsula): Sedimentology of glacially influenced continental margin topsets and foresets: Marine Geology, v. 178, no. 1-4, p. 135-156, https://doi.org/10.1016/S0025-3227(01)00184-0.","startPage":"135","endPage":"156","numberOfPages":"22","costCenters":[],"links":[{"id":207292,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/S0025-3227(01)00184-0"},{"id":232121,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"178","issue":"1-4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a6c87e4b0c8380cd74c8a","contributors":{"authors":[{"text":"Eyles, N.","contributorId":65242,"corporation":false,"usgs":true,"family":"Eyles","given":"N.","affiliations":[],"preferred":false,"id":397124,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Daniels, J.","contributorId":93244,"corporation":false,"usgs":true,"family":"Daniels","given":"J.","affiliations":[],"preferred":false,"id":397125,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Osterman, L.E.","contributorId":53836,"corporation":false,"usgs":true,"family":"Osterman","given":"L.E.","email":"","affiliations":[],"preferred":false,"id":397123,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Januszczak, N.","contributorId":40763,"corporation":false,"usgs":true,"family":"Januszczak","given":"N.","email":"","affiliations":[],"preferred":false,"id":397122,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70023119,"text":"70023119 - 2001 - Mountains on Io: High-resolution Galileo observations, initial interpretations, and formation models","interactions":[],"lastModifiedDate":"2022-12-01T17:37:05.095565","indexId":"70023119","displayToPublicDate":"2001-01-01T00:00:00","publicationYear":"2001","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2317,"text":"Journal of Geophysical Research E: Planets","active":true,"publicationSubtype":{"id":10}},"title":"Mountains on Io: High-resolution Galileo observations, initial interpretations, and formation models","docAbstract":"During three close flybys in late 1999 and early 2000 the Galileo spacecraft acquired new observations of the mountains that tower above Io's surface. These images have revealed surprising variety in the mountains' morphologies. They range from jagged peaks several kilometers high to lower, rounded structures. Some are very smooth, others are covered by numerous parallel ridges. Many mountains have margins that are collapsing outward in large landslides or series of slump blocks, but a few have steep, scalloped scarps. From these observations we can gain insight into the structure and material properties of Io's crust as well as into the erosional processes acting on Io. We have also investigated formation mechanisms proposed for these structures using finite-element analysis. Mountain formation might be initiated by global compression due to the high rate of global subsidence associated with Io's high resurfacing rate; however, our models demonstrate that this hypothesis lacks a mechanism for isolating the mountains. The large fraction (∼40%) of mountains that are associated with paterae suggests that in some cases these features are tectonically related. Therefore we have also simulated the stresses induced in Io's crust by a combination of a thermal upwelling in the mantle with global lithospheric compression and have shown that this can focus compressional stresses. If this mechanism is responsible for some of Io's mountains, it could also explain the common association of mountains with paterae.
","language":"English","publisher":"American Geophysical Union","doi":"10.1029/2000JE001354","issn":"01480227","usgsCitation":"Turtle, E.P., Jaeger, W.L., Keszthelyi, L., McEwen, A.S., Milazzo, M.P., Moore, J., Phillips, C.B., Radebaugh, J., Simonelli, D.P., Schuster, P., and Galileo SSI Team, 2001, Mountains on Io: High-resolution Galileo observations, initial interpretations, and formation models: Journal of Geophysical Research E: Planets, v. 106, no. E12, p. 33175-33199, https://doi.org/10.1029/2000JE001354.","productDescription":"25 p.","startPage":"33175","endPage":"33199","costCenters":[],"links":[{"id":233914,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"otherGeospatial":"Io","volume":"106","issue":"E12","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a5ebbe4b0c8380cd70c3c","contributors":{"authors":[{"text":"Turtle, Elizabeth P.","contributorId":45443,"corporation":false,"usgs":false,"family":"Turtle","given":"Elizabeth","email":"","middleInitial":"P.","affiliations":[],"preferred":false,"id":396277,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Jaeger, Windy L.","contributorId":61679,"corporation":false,"usgs":true,"family":"Jaeger","given":"Windy","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":396297,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Keszthelyi, Laszlo P. 0000-0003-1879-4331 laz@usgs.gov","orcid":"https://orcid.org/0000-0003-1879-4331","contributorId":52802,"corporation":false,"usgs":true,"family":"Keszthelyi","given":"Laszlo P.","email":"laz@usgs.gov","affiliations":[{"id":131,"text":"Astrogeology Science Center","active":true,"usgs":true}],"preferred":true,"id":396231,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"McEwen, Alfred S.","contributorId":61657,"corporation":false,"usgs":false,"family":"McEwen","given":"Alfred","email":"","middleInitial":"S.","affiliations":[{"id":7042,"text":"University of Arizona","active":true,"usgs":false}],"preferred":false,"id":396232,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Milazzo, Moses P. 0000-0002-9101-2191 moses@usgs.gov","orcid":"https://orcid.org/0000-0002-9101-2191","contributorId":4811,"corporation":false,"usgs":true,"family":"Milazzo","given":"Moses","email":"moses@usgs.gov","middleInitial":"P.","affiliations":[{"id":131,"text":"Astrogeology Science Center","active":true,"usgs":true}],"preferred":true,"id":396319,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Moore, Jeff","contributorId":49059,"corporation":false,"usgs":true,"family":"Moore","given":"Jeff","email":"","affiliations":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"preferred":false,"id":396284,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Phillips, Cynthia B.","contributorId":210488,"corporation":false,"usgs":false,"family":"Phillips","given":"Cynthia","email":"","middleInitial":"B.","affiliations":[],"preferred":false,"id":396365,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Radebaugh, Jani","contributorId":101792,"corporation":false,"usgs":true,"family":"Radebaugh","given":"Jani","email":"","affiliations":[],"preferred":false,"id":396260,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Simonelli, Damon P.","contributorId":210484,"corporation":false,"usgs":false,"family":"Simonelli","given":"Damon","email":"","middleInitial":"P.","affiliations":[],"preferred":false,"id":396271,"contributorType":{"id":1,"text":"Authors"},"rank":9},{"text":"Schuster, Peter","contributorId":61607,"corporation":false,"usgs":true,"family":"Schuster","given":"Peter","email":"","affiliations":[],"preferred":false,"id":396261,"contributorType":{"id":1,"text":"Authors"},"rank":10},{"text":"Galileo SSI Team","contributorId":299582,"corporation":true,"usgs":false,"organization":"Galileo SSI Team","id":858120,"contributorType":{"id":1,"text":"Authors"},"rank":11}]}} ,{"id":70023277,"text":"70023277 - 2001 - Diamond-anvil cell observations of a new methane hydrate phase in the 100-MPa pressure range","interactions":[],"lastModifiedDate":"2012-03-12T17:20:13","indexId":"70023277","displayToPublicDate":"2001-01-01T00:00:00","publicationYear":"2001","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2424,"text":"Journal of Physical Chemistry A","active":true,"publicationSubtype":{"id":10}},"title":"Diamond-anvil cell observations of a new methane hydrate phase in the 100-MPa pressure range","docAbstract":"A new high-pressure phase of methane hydrate has been identified based on its high optical relief, distinct pressure-temperature phase relations, and Raman spectra. In-situ optical observations were made in a hydrothermal diamond-anvil cell at temperatures between -40?? and 60 ??C and at pressures up to 900 MPa. Two new invariant points were located at -8.7 ??C and 99 MPa for the assemblage consisting of the new phase, structure I methane hydrate, ice Ih, and water, and at 35.3 ??C and 137 MPa for the new phase-structure I methane hydrate-water-methane vapor. Existence of the new phase is critical for understanding the phase relations among the hydrates at low to moderate pressures, and may also have important implications for understanding the hydrogen bonding in H2O and the behavior of water in the planetary bodies, such as Europa, of the outer solar system.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Physical Chemistry A","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1021/jp002735w","issn":"10895639","usgsCitation":"Chou, I., Sharma, A., Burruss, R., Hemley, R., Goncharov, A., Stern, L., and Kirby, S.H., 2001, Diamond-anvil cell observations of a new methane hydrate phase in the 100-MPa pressure range: Journal of Physical Chemistry A, v. 105, no. 19, p. 4664-4668, https://doi.org/10.1021/jp002735w.","startPage":"4664","endPage":"4668","numberOfPages":"5","costCenters":[],"links":[{"id":207638,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1021/jp002735w"},{"id":232760,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"105","issue":"19","noUsgsAuthors":false,"publicationDate":"2001-04-20","publicationStatus":"PW","scienceBaseUri":"505a00a7e4b0c8380cd4f83b","contributors":{"authors":[{"text":"Chou, I.-M. 0000-0001-5233-6479","orcid":"https://orcid.org/0000-0001-5233-6479","contributorId":44283,"corporation":false,"usgs":true,"family":"Chou","given":"I.-M.","affiliations":[{"id":245,"text":"Eastern Mineral and Environmental Resources Science Center","active":true,"usgs":true}],"preferred":false,"id":397115,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Sharma, A.","contributorId":59978,"corporation":false,"usgs":true,"family":"Sharma","given":"A.","email":"","affiliations":[],"preferred":false,"id":397117,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Burruss, R.C. 0000-0001-6827-804X","orcid":"https://orcid.org/0000-0001-6827-804X","contributorId":99574,"corporation":false,"usgs":true,"family":"Burruss","given":"R.C.","affiliations":[],"preferred":false,"id":397119,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Hemley, R.J.","contributorId":70118,"corporation":false,"usgs":true,"family":"Hemley","given":"R.J.","email":"","affiliations":[],"preferred":false,"id":397118,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Goncharov, A.F.","contributorId":12230,"corporation":false,"usgs":true,"family":"Goncharov","given":"A.F.","email":"","affiliations":[],"preferred":false,"id":397113,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Stern, L.A.","contributorId":38293,"corporation":false,"usgs":true,"family":"Stern","given":"L.A.","email":"","affiliations":[],"preferred":false,"id":397114,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Kirby, S. H.","contributorId":51721,"corporation":false,"usgs":true,"family":"Kirby","given":"S.","middleInitial":"H.","affiliations":[],"preferred":false,"id":397116,"contributorType":{"id":1,"text":"Authors"},"rank":7}]}} ,{"id":70023711,"text":"70023711 - 2001 - Paleomagnetic data bearing on style of Miocene deformation in the Lake Mead area, Southern Nevada","interactions":[],"lastModifiedDate":"2012-03-12T17:20:12","indexId":"70023711","displayToPublicDate":"2001-01-01T00:00:00","publicationYear":"2001","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2468,"text":"Journal of Structural Geology","active":true,"publicationSubtype":{"id":10}},"title":"Paleomagnetic data bearing on style of Miocene deformation in the Lake Mead area, Southern Nevada","docAbstract":"Paleomagnetic and structural data from intermediate to mafic composition lava flows and related dikes in all major blocks of the late Miocene Hamblin-Cleopatra Volcano, which was structurally dismembered during the development of the Lake Mead Fault System (LMFS), provide limits on the magnitude and sense of tilting and vertical axis rotation of crust during extension of this part of the Basin and Range province. Sinistral separation along the fault system dissected the volcano into three major blocks. The eastern, Cleopatra Lobe of the volcano is structurally the most intact section of the volcano. Normal and reverse polarity data from paleomagnetic sites collected along traverses in the Cleopatra Lobe yield an in situ grand mean of Declination (D) = 339??, Inclination (I) = +54??, ??95 = 3.1??, k = 27.2, N = 81 sites. The rocks of the central core of the volcano yield an in situ grand mean of D = 3??, I = + 59??, ??95 = 6.8??, k = 42.5, N = 11 sites (six normal, five reverse polarity). Sites collected within the western Hamblin Lobe of the volcano are exclusively of reverse polarity and yield an overall in situ mean of D = 168??, I = -58??, ??95 = 6.5??. k = 28.9, N = 18 sites. Interpretation of the paleomagnetic data in the context of the structural history of the volcano and surrounding area, considers the possibility of two different types of structural corrections. A stratigraphic tilt correction involves restoring flows to the horizontal using the present strike. This correction assumes no initial, possibly radial, dip of flows of the volcano and is considered invalid. A structural tilt correction to the data assumes that dikes of the radiating swarm associated with the volcano were originally vertical and results in block mean directions of D = 9??, I = +53??, ??95 = 3.1??, k = 27.2, and D = 58??, I = + 78??, ??95 = 6.8, k = 42.5, for the Cleopatra Lobe and the central intrusive core, respectively. The data from the Cleopatra Lobe are slightly discordant, in a clockwise sense, from expected middle- to late-Miocene field directions. The data from the volcano are not consistent with a proposed structural model of uniform, moderate magnitude, statistically significant, counter-clockwise vertical axis rotation of fault-bounded blocks during overall sinsitral displacement along the LMFS. We also analyzed dikes of the northernmost part of the Miocene Wilson Ridge hypabyssal igneous complex, strata of the Triassic Chinle Formation, and basalt flows of the Miocene West End Wash/Callville Mesa volcanic centers. Dikes in the Wilson Ridge pluton and the Triassic strata yield magnetizations with directions suggestive of statistically significant, clockwise, vertical-axis rotations consistent with local, large-magnitude shear of crustal fragments near some of the faults of the LMFS. Late Cenozoic deformation of the Hamblin-Cleopatra volcano area appears to have been non-uniform in scale and magnitude and no single structural model, involving strictly strike-slip faulting, can account for the observed paleomagnetic data. ?? 2001 Elsevier Science Ltd. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Structural Geology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/S0191-8141(00)00191-7","issn":"01918141","usgsCitation":"Wawrzyniec, T., Geissman, J.W., Anderson, R., Harlan, S.S., and Faulds, J., 2001, Paleomagnetic data bearing on style of Miocene deformation in the Lake Mead area, Southern Nevada: Journal of Structural Geology, v. 23, no. 8, p. 1255-1279, https://doi.org/10.1016/S0191-8141(00)00191-7.","startPage":"1255","endPage":"1279","numberOfPages":"25","costCenters":[],"links":[{"id":207591,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/S0191-8141(00)00191-7"},{"id":232665,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"23","issue":"8","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a7409e4b0c8380cd773d8","contributors":{"authors":[{"text":"Wawrzyniec, T.F.","contributorId":75721,"corporation":false,"usgs":true,"family":"Wawrzyniec","given":"T.F.","email":"","affiliations":[],"preferred":false,"id":398523,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Geissman, J. W.","contributorId":105760,"corporation":false,"usgs":true,"family":"Geissman","given":"J.","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":398526,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Anderson, R.E.","contributorId":91479,"corporation":false,"usgs":true,"family":"Anderson","given":"R.E.","email":"","affiliations":[],"preferred":false,"id":398525,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Harlan, S. S.","contributorId":11651,"corporation":false,"usgs":true,"family":"Harlan","given":"S.","email":"","middleInitial":"S.","affiliations":[],"preferred":false,"id":398522,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Faulds, J.","contributorId":80458,"corporation":false,"usgs":true,"family":"Faulds","given":"J.","affiliations":[],"preferred":false,"id":398524,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}} ]}