Thorstenson and Plummer's (1977) \"stoichiometric saturation' model is reviewed, and a general relation between stoichiometric saturation Kss constants and excess free energies of mixing is derived for a binary solid-solution B1-xCxA: GE = RT[ln Kss - xln(xKCA) - (l-x)ln((l-x)KBA)]. This equation allows a suitable excess free energy function, such as Guggenheim's (1937) sub-regular function, to be fitted from experimentally determined Kss constants. Solid-phase free energies and component activity-coefficients can then be determined from one or two fitted parameters and from the endmember solubility products KBA and KCA. A general form of Lippmann's (1977,1980) \"solutus equation is derived from an examination of Lippmann's (1977,1980) \"total solubility product' model. Lippmann's II or \"total solubility product' variable is used to represent graphically not only thermodynamic equilibrium states and primary saturation states but also stoichiometric saturation and pure phase saturation states.
","language":"English","publisher":"American Journal of Science","doi":"10.2475/ajs.290.2.164","issn":"00029599","usgsCitation":"Glynn, P.D., and Reardon, E., 1990, Solid-solution aqueous-solution equilibria: Thermodynamic theory and representation: American Journal of Science, v. 290, no. 2, p. 164-201, https://doi.org/10.2475/ajs.290.2.164.","productDescription":"38 p.","startPage":"164","endPage":"201","numberOfPages":"38","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":479859,"rank":1,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.2475/ajs.290.2.164","text":"Publisher Index Page"},{"id":223521,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"290","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b923ae4b08c986b319d87","contributors":{"authors":[{"text":"Glynn, P. D.","contributorId":7008,"corporation":false,"usgs":true,"family":"Glynn","given":"P.","email":"","middleInitial":"D.","affiliations":[],"preferred":false,"id":373471,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Reardon, E.J.","contributorId":47088,"corporation":false,"usgs":true,"family":"Reardon","given":"E.J.","email":"","affiliations":[],"preferred":false,"id":373472,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70016418,"text":"70016418 - 1990 - Thrust-ridge paleodepositional model for the Upper Freeport coal bed and associated clastic facies, Upper Potomac coal field, Appalachian Basin, U.S.A.","interactions":[],"lastModifiedDate":"2024-02-22T12:05:43.784155","indexId":"70016418","displayToPublicDate":"1990-01-01T00:00:00","publicationYear":"1990","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":"Thrust-ridge paleodepositional model for the Upper Freeport coal bed and associated clastic facies, Upper Potomac coal field, Appalachian Basin, U.S.A.","docAbstract":"A blind-thrust-ridge model is proposed to explain the lack of coarse clastic material in the vast minable Upper Freeport coal bed (UF). This coal bed contains only fine elastic partings and is overlain by regionally extensive, closely spaced channel-belt deposits in the Upper Potomac coal field of the Appalachian basin. A blind-thrust ridge may have formed a sediment trap and prevented c coarse fluvial sediments from entering the swamp during a period (Westphalian D) when the thick Upper Freeport peat accumulated. Anticlinal thrust ridges and associated depressions may have existed uninterrupted for about 40 km parallel to the Appalachian orogen. Sediment shed from the breached anticlinal ridges accumulated in the sediment trap and was carried out of the ends of the trap by streams that occupied the shear zone at the ends of the blind-thrust ridge. The extent, parallel to the orogen, of thick, areally extensive UF is related to the length of the blind-thrust ridge that, in turn, controlled the spacing of the river-derived coarse clastic sediments that entered the main basin from the east. The thrust plane eventually emerged to the surface of the blind-thrust ridge and peat accumulation was terminated when the ridge became eroded and the sediment trapped behind it was released. The peat was buried by abundant coarse clastic sediment, which formed closely spaced channel belts and intervening flood basins. This model has implications for widespread peat deposits (now coal) that developed in tropical regions a few hundred kilometers from the sea in a tectonically active foreland basin.
A technique to locate automatically boundaries between crustal blocks of disparate densities was applied to upward continued isostatic residual gravity data. The boundary analysis delineates a narrow gravitational trough that extends the length of the Pliocene and Quaternary volcanic arc from Mount Baker in northern Washington to Lassen Peak in California. Gravitational highs interrupt the trough at two localities: a northwest trending high in southern Washington and a northeast trending high between Mount Shasta and Lassen Peak. The latter anomaly is one of a set of northeast trending anomalies that, within the Quaternary arc, appear related to volcanic segmentation proposed previously on the basis of spatial and compositional distributions of volcanoes. These northeast trending anomalies extend hundreds of kilometers northeast of the arc, are caused by sources in the upper crust, and in some cases are related to exposed pre-Tertiary rocks. Segmentation models invoke geometric characteristics of the subducting plate as the primary factor controlling location and chemistry of volcanism, and these northeast trending gravity sources also may be a product of disturbance of the upper crust by the subduction process. More likely, the gravity sources may reflect upper crustal structures older than the High Cascades, possibly relicts from earlier accretionary events or more recent crustal deformation, that have actively influenced the spatial location of more recent volcanism. Much of the Pliocene and Quaternary volcanism of the Cascade arc has concentrated on or near contacts between crustal blocks of disparate density. These contacts may promote the ascension of magma to the Earth's surface.
","language":"English","publisher":"American Geophysical Union","doi":"10.1029/JB095iB12p19439","issn":"01480227","usgsCitation":"Blakely, R., and Jachens, R., 1990, Volcanism, isostatic residual gravity and regional tectonic setting of the Cascade volcanic province: Journal of Geophysical Research Solid Earth, v. 95, no. B12, p. 19439-19451, https://doi.org/10.1029/JB095iB12p19439.","productDescription":"13 p.","startPage":"19439","endPage":"19451","costCenters":[],"links":[{"id":223010,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"95","issue":"B12","noUsgsAuthors":false,"publicationDate":"2012-09-20","publicationStatus":"PW","scienceBaseUri":"505bc323e4b08c986b32af96","contributors":{"authors":[{"text":"Blakely, R.J. 0000-0003-1701-5236","orcid":"https://orcid.org/0000-0003-1701-5236","contributorId":70755,"corporation":false,"usgs":true,"family":"Blakely","given":"R.J.","affiliations":[],"preferred":false,"id":373349,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Jachens, R.C.","contributorId":55433,"corporation":false,"usgs":true,"family":"Jachens","given":"R.C.","email":"","affiliations":[],"preferred":false,"id":373348,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70016382,"text":"70016382 - 1990 - The flaminio obelisk in Rome: vibrational characteristics as part of preservation efforts","interactions":[],"lastModifiedDate":"2013-03-13T15:19:49","indexId":"70016382","displayToPublicDate":"1990-01-01T00:00:00","publicationYear":"1990","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1434,"text":"Earthquake Engineering and Structural Dynamics","active":true,"publicationSubtype":{"id":10}},"title":"The flaminio obelisk in Rome: vibrational characteristics as part of preservation efforts","docAbstract":"The purpose of the paper is to study the vibrational characteristics of the Flaminio Obelisk in Rome as part of general studies being performed for preservation purposes. The state of preservation of the monument is described as well as the sonic method used to evaluate the integrity of the sections. The results of the sonic tests are used to determine reductions in the cross-sectional properties. A stick model including two rotational frequency independent soil springs at the basement level of the obelisk is developed. A response spectrum and stress analysis according to the Italian Seismic Code is performed considering and evaluating the degraded characteristics of sections. -from Authors","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Earthquake Engineering and Structural Dynamics","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Wiley","doi":"10.1002/eqe.4290190110","usgsCitation":"Bongiovanni, G., Çelebi, M., and Clemente, P., 1990, The flaminio obelisk in Rome: vibrational characteristics as part of preservation efforts: Earthquake Engineering and Structural Dynamics, v. 19, no. 1, p. 107-118, https://doi.org/10.1002/eqe.4290190110.","startPage":"107","endPage":"118","numberOfPages":"12","costCenters":[],"links":[{"id":222851,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":269242,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1002/eqe.4290190110"}],"volume":"19","issue":"1","noUsgsAuthors":false,"publicationDate":"2006-12-18","publicationStatus":"PW","scienceBaseUri":"505bac0de4b08c986b323237","contributors":{"authors":[{"text":"Bongiovanni, G.","contributorId":56377,"corporation":false,"usgs":true,"family":"Bongiovanni","given":"G.","email":"","affiliations":[],"preferred":false,"id":373332,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Çelebi, M.","contributorId":36946,"corporation":false,"usgs":true,"family":"Çelebi","given":"M.","affiliations":[],"preferred":false,"id":373331,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Clemente, P.","contributorId":100536,"corporation":false,"usgs":true,"family":"Clemente","given":"P.","email":"","affiliations":[],"preferred":false,"id":373333,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70016379,"text":"70016379 - 1990 - Rheological properties of simulated debris flows in the laboratory environment","interactions":[],"lastModifiedDate":"2012-03-12T17:18:42","indexId":"70016379","displayToPublicDate":"1990-01-01T00:00:00","publicationYear":"1990","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Rheological properties of simulated debris flows in the laboratory environment","docAbstract":"Steady debris flows with or without a snout are simulated in a 'conveyor-belt' flume using dry glass spheres of a uniform size, 5 or 14 mm in diameter, and their rheological properties described quantitatively in constants in a generalized viscoplastic fluid (GVF) model. Close agreement of the measured velocity profiles with the theoretical ones obtained from the GVF model strongly supports the validity of a GVF model based on the continuum-mechanics approach. Further comparisons of the measured and theoretical velocity profiles along with empirical relations among the shear stress, the normal stress, and the shear rate developed from the 'ring-shear' apparatus determine the values of the rheological parameters in the GVF model, namely the flow-behavior index, the consistency index, and the cross-consistency index. Critical issues in the evaluation of such rheological parameters using the conveyor-belt flume and the ring-shear apparatus are thus addressed in this study.","largerWorkTitle":"Hydraulics/Hydrology of Arid Lands","conferenceTitle":"Proceedings of the International Symposium on Hydraulics/Hydrology of Arid Lands and 1990 National Conference on Hydraulic Engineering","conferenceDate":"30 July 1990 through 2 August 1990","conferenceLocation":"San Diego, CA, USA","language":"English","publisher":"Publ by ASCE","publisherLocation":"Boston, MA, United States","isbn":"0872627713","usgsCitation":"Ling, C., Chen, C., and Jan, C., 1990, Rheological properties of simulated debris flows in the laboratory environment, in Hydraulics/Hydrology of Arid Lands, San Diego, CA, USA, 30 July 1990 through 2 August 1990, p. 218-224.","startPage":"218","endPage":"224","numberOfPages":"7","costCenters":[],"links":[{"id":222848,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505aad3ce4b0c8380cd86e74","contributors":{"editors":[{"text":"French Richard H.","contributorId":128450,"corporation":true,"usgs":false,"organization":"French Richard H.","id":536329,"contributorType":{"id":2,"text":"Editors"},"rank":1}],"authors":[{"text":"Ling, Chi-Hai","contributorId":55154,"corporation":false,"usgs":true,"family":"Ling","given":"Chi-Hai","email":"","affiliations":[],"preferred":false,"id":373326,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Chen, Cheng-lung","contributorId":30752,"corporation":false,"usgs":true,"family":"Chen","given":"Cheng-lung","email":"","affiliations":[],"preferred":false,"id":373325,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Jan, Chyan-Deng","contributorId":60384,"corporation":false,"usgs":true,"family":"Jan","given":"Chyan-Deng","email":"","affiliations":[],"preferred":false,"id":373327,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70016373,"text":"70016373 - 1990 - Sediment movement along the U.S. east coast continental shelf-I. Estimates of bottom stress using the Grant-Madsen model and near-bottom wave and current measurements","interactions":[],"lastModifiedDate":"2023-11-30T00:45:28.676271","indexId":"70016373","displayToPublicDate":"1990-01-01T00:00:00","publicationYear":"1990","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1333,"text":"Continental Shelf Research","active":true,"publicationSubtype":{"id":10}},"title":"Sediment movement along the U.S. east coast continental shelf-I. Estimates of bottom stress using the Grant-Madsen model and near-bottom wave and current measurements","docAbstract":"Bottom stress is calculated for several long-term time-series observations, made on the U.S. east coast continental shelf during winter, using the wave-current interaction and moveable bed models of Grant and Madsen (1979, Journal of Geophysical Research, 84, 1797-1808; 1982, Journal of Geophysical Research, 87, 469-482). The wave and current measurements were obtained by means of a bottom tripod system which measured current using a Savonius rotor and vane and waves by means of a pressure sensor. The variables were burst sampled about 10% of the time. Wave energy was reasonably resolved, although aliased by wave groupiness, and wave period was accurate to 1-2 s during large storms. Errors in current speed and direction depend on the speed of the mean current relative to the wave current. In general, errors in bottom stress caused by uncertainties in measured current speed and wave characteristics were 10-20%.
During storms, the bottom stress calculated using the Grant-Madsen models exceeded stress computed from conventional drag laws by a factor of about 1.5 on average and 3 or more during storm peaks. Thus, even in water as deep as 80 m, oscillatory near-bottom currents associated with surface gravity waves of period 12 s or longer will contribute substantially to bottom stress. Given that the Grant-Madsen model is correct, parameterizations of bottom stress that do not incorporate wave effects will substantially underestimate stress and sediment transport in this region of the continental shelf.
","language":"English","publisher":"Elsevier","doi":"10.1016/0278-4343(90)90048-Q","issn":"02784343","usgsCitation":"Lyne, V., Butman, B., and Grant, W., 1990, Sediment movement along the U.S. east coast continental shelf-I. Estimates of bottom stress using the Grant-Madsen model and near-bottom wave and current measurements: Continental Shelf Research, v. 10, no. 5, p. 397-428, https://doi.org/10.1016/0278-4343(90)90048-Q.","productDescription":"32 p.","startPage":"397","endPage":"428","costCenters":[{"id":678,"text":"Woods Hole Coastal and Marine Science Center","active":true,"usgs":true}],"links":[{"id":223566,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","otherGeospatial":"Georges Bank, Mid-Atlantic Bight","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -76,\n 36\n ],\n [\n -59.58984374999999,\n 36\n ],\n [\n -59.58984374999999,\n 43\n ],\n [\n -76,\n 43\n ],\n [\n -76,\n 36\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"10","issue":"5","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b899ce4b08c986b316e40","contributors":{"authors":[{"text":"Lyne, V.D.","contributorId":78473,"corporation":false,"usgs":true,"family":"Lyne","given":"V.D.","email":"","affiliations":[],"preferred":false,"id":373312,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Butman, B.","contributorId":85580,"corporation":false,"usgs":true,"family":"Butman","given":"B.","email":"","affiliations":[],"preferred":false,"id":373313,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Grant, W.D.","contributorId":11764,"corporation":false,"usgs":true,"family":"Grant","given":"W.D.","email":"","affiliations":[],"preferred":false,"id":373311,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70016372,"text":"70016372 - 1990 - Intragranular diffusion: An important mechanism influencing solute transport in clastic aquifers?","interactions":[],"lastModifiedDate":"2019-10-17T16:28:36","indexId":"70016372","displayToPublicDate":"1990-01-01T00:00:00","publicationYear":"1990","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3338,"text":"Science","active":true,"publicationSubtype":{"id":10}},"title":"Intragranular diffusion: An important mechanism influencing solute transport in clastic aquifers?","docAbstract":"Quantification of intragranular porosity in sand-size material from an aquifer on Cape Cod, Massachusetts, by scanning electron microscopy, mercury injection, and epifluorescence techniques shows that there are more reaction sites and that porosity is greater that indicated by standard short-term laboratory tests and measurement techniques. Results from laboratory and field tracer tests show solute nonequilibrium for a reacting ion consistent with a model of diffusion into, and exchange within, grain interiors. These data indicate that a diffusion expression needs to be included in transport codes, particularly for simulation of the transport of radioactive and toxic wastes.","language":"English","publisher":"AAAS","doi":"10.1126/science.247.4950.1569","issn":"00368075","usgsCitation":"Wood, W., Kraemer, T.F., and Hearn, P., 1990, Intragranular diffusion: An important mechanism influencing solute transport in clastic aquifers?: Science, v. 247, no. 4950, p. 1569-1572, https://doi.org/10.1126/science.247.4950.1569.","productDescription":"4 p.","startPage":"1569","endPage":"1572","numberOfPages":"4","costCenters":[],"links":[{"id":223518,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Massachusetts ","otherGeospatial":"Cape Cod","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -70.69427490234375,\n 41.64213096472801\n ],\n [\n -69.89501953125,\n 41.64213096472801\n ],\n [\n -69.89501953125,\n 42.1613675328748\n ],\n [\n -70.69427490234375,\n 42.1613675328748\n ],\n [\n -70.69427490234375,\n 41.64213096472801\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"247","issue":"4950","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a3dc4e4b0c8380cd63818","contributors":{"authors":[{"text":"Wood, W.W.","contributorId":21974,"corporation":false,"usgs":true,"family":"Wood","given":"W.W.","email":"","affiliations":[],"preferred":false,"id":373308,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Kraemer, T. F.","contributorId":63400,"corporation":false,"usgs":true,"family":"Kraemer","given":"T.","email":"","middleInitial":"F.","affiliations":[],"preferred":false,"id":373309,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Hearn, P.P. Jr.","contributorId":76763,"corporation":false,"usgs":true,"family":"Hearn","given":"P.P.","suffix":"Jr.","email":"","affiliations":[],"preferred":false,"id":373310,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70016369,"text":"70016369 - 1990 - Multi-model stereo restitution","interactions":[],"lastModifiedDate":"2012-03-12T17:18:41","indexId":"70016369","displayToPublicDate":"1990-01-01T00:00:00","publicationYear":"1990","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3052,"text":"Photogrammetric Engineering and Remote Sensing","active":true,"publicationSubtype":{"id":10}},"title":"Multi-model stereo restitution","docAbstract":"Methods are described that permit simultaneous orientation of many small-frame photogrammetric models in an analytical plotter. The multi-model software program enables the operator to move freely between the oriented models during interpretation and mapping. Models change automatically when the measuring mark is moved from one frame to another, moving to the same ground coordinates in the neighboring model. Thus, data collection and plotting can be performed continuously across model boundaries. The orientation of the models is accomplished by a bundle block adjustment. -from Author","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Photogrammetric Engineering and Remote Sensing","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","usgsCitation":"Dueholm, K., 1990, Multi-model stereo restitution: Photogrammetric Engineering and Remote Sensing, v. 56, no. 2, p. 239-242.","startPage":"239","endPage":"242","numberOfPages":"4","costCenters":[],"links":[{"id":223467,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"56","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a5fb9e4b0c8380cd710cd","contributors":{"authors":[{"text":"Dueholm, K.S.","contributorId":98338,"corporation":false,"usgs":true,"family":"Dueholm","given":"K.S.","affiliations":[],"preferred":false,"id":373300,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70016368,"text":"70016368 - 1990 - Simulation of rockfalls triggered by earthquakes","interactions":[],"lastModifiedDate":"2012-03-12T17:18:41","indexId":"70016368","displayToPublicDate":"1990-01-01T00:00:00","publicationYear":"1990","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3306,"text":"Rock Mechanics and Rock Engineering","active":true,"publicationSubtype":{"id":10}},"title":"Simulation of rockfalls triggered by earthquakes","docAbstract":"A computer program to simulate the downslope movement of boulders in rolling or bouncing modes has been developed and applied to actual rockfalls triggered by the Mammoth Lakes, California, earthquake sequence in 1980 and the Central Idaho earthquake in 1983. In order to reproduce a movement mode where bouncing predominated, we introduced an artificial unevenness to the slope surface by adding a small random number to the interpolated value of the mid-points between the adjacent surveyed points. Three hundred simulations were computed for each site by changing the random number series, which determined distances and bouncing intervals. The movement of the boulders was, in general, rather erratic depending on the random numbers employed, and the results could not be seen as deterministic but stochastic. The closest agreement between calculated and actual movements was obtained at the site with the most detailed and accurate topographic measurements. ?? 1990 Springer-Verlag.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Rock Mechanics and Rock Engineering","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisherLocation":"Springer-Verlag","doi":"10.1007/BF01020418","issn":"07232632","usgsCitation":"Kobayashi, Y., Harp, E.L., and Kagawa, T., 1990, Simulation of rockfalls triggered by earthquakes: Rock Mechanics and Rock Engineering, v. 23, no. 1, p. 1-20, https://doi.org/10.1007/BF01020418.","startPage":"1","endPage":"20","numberOfPages":"20","costCenters":[],"links":[{"id":205374,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/BF01020418"},{"id":223466,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"23","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b907be4b08c986b31951b","contributors":{"authors":[{"text":"Kobayashi, Y.","contributorId":64811,"corporation":false,"usgs":true,"family":"Kobayashi","given":"Y.","email":"","affiliations":[],"preferred":false,"id":373298,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Harp, E. L.","contributorId":59026,"corporation":false,"usgs":true,"family":"Harp","given":"E.","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":373297,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Kagawa, T.","contributorId":88089,"corporation":false,"usgs":true,"family":"Kagawa","given":"T.","email":"","affiliations":[],"preferred":false,"id":373299,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70016359,"text":"70016359 - 1990 - Anaerobic oxidation of toluene, phenol, and p-cresol by the dissimilatory iron-reducing organism, GS-15","interactions":[],"lastModifiedDate":"2023-01-26T15:31:11.290759","indexId":"70016359","displayToPublicDate":"1990-01-01T00:00:00","publicationYear":"1990","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":850,"text":"Applied and Environmental Microbiology","active":true,"publicationSubtype":{"id":10}},"displayTitle":"Anaerobic oxidation of toluene, phenol, and p-cresol by the dissimilatory iron-reducing organism, GS-15","title":"Anaerobic oxidation of toluene, phenol, and p-cresol by the dissimilatory iron-reducing organism, GS-15","docAbstract":"The dissimilatory Fe(III) reducer, GS-15, is the first microorganism known to couple the oxidation of aromatic compounds to the reduction of Fe(III) and the first example of a pure culture of any kind known to anaerobically oxidize an aromatic hydrocarbon, toluene. In this study, the metabolism of toluene, phenol, and p-cresol by GS-15 was investigated in more detail. GS-15 grew in an anaerobic medium with toluene as the sole electron donor and Fe(III) oxide as the electron acceptor. Growth coincided with Fe(III) reduction. [ring-14C]toluene was oxidized to 14CO2, and the stoichiometry of 14CO2 production and Fe(III) reduction indicated that GS-15 completely oxidized toluene to carbon dioxide with Fe(III) as the electron acceptor. Magnetite was the primary iron end product during toluene oxidation. Phenol and p-cresol were also completely oxidized to carbon dioxide with Fe(III) as the sole electron acceptor, and GS-15 could obtain energy to support growth by oxidizing either of these compounds as the sole electron donor. p-Hydroxybenzoate was a transitory extracellular intermediate of phenol and p-cresol metabolism but not of toluene metabolism. GS-15 oxidized potential aromatic intermediates in the oxidation of toluene (benzylalcohol and benzaldehyde) and p-cresol (p-hydroxybenzylalcohol and p-hydroxybenzaldehyde). The metabolism described here provides a model for how aromatic hydrocarbons and phenols may be oxidized with the reduction of Fe(III) in contaminated aquifers and petroleum-containing sediments.
","language":"English","publisher":"American Society for Microbiology","doi":"10.1128/aem.56.6.1858-1864.1990","issn":"00992240","usgsCitation":"Lovley, D.R., and Lonergan, D., 1990, Anaerobic oxidation of toluene, phenol, and p-cresol by the dissimilatory iron-reducing organism, GS-15: Applied and Environmental Microbiology, v. 56, no. 6, p. 1858-1864, https://doi.org/10.1128/aem.56.6.1858-1864.1990.","productDescription":"7 p.","startPage":"1858","endPage":"1864","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":479838,"rank":2,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1128/aem.56.6.1858-1864.1990","text":"Publisher Index Page"},{"id":223317,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"56","issue":"6","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059eac6e4b0c8380cd48a47","contributors":{"authors":[{"text":"Lovley, Derek R.","contributorId":107852,"corporation":false,"usgs":true,"family":"Lovley","given":"Derek","middleInitial":"R.","affiliations":[],"preferred":false,"id":373269,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Lonergan, D.J.","contributorId":86110,"corporation":false,"usgs":true,"family":"Lonergan","given":"D.J.","email":"","affiliations":[],"preferred":false,"id":373268,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70016355,"text":"70016355 - 1990 - H, O, Sr, Nd, and Pb isotope geochemistry of the Latir volcanic field and cogenetic intrusions, New Mexico, and relations between evolution of a continental magmatic center and modifications of the lithosphere","interactions":[],"lastModifiedDate":"2012-03-12T17:18:42","indexId":"70016355","displayToPublicDate":"1990-01-01T00:00:00","publicationYear":"1990","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1336,"text":"Contributions to Mineralogy and Petrology","active":true,"publicationSubtype":{"id":10}},"title":"H, O, Sr, Nd, and Pb isotope geochemistry of the Latir volcanic field and cogenetic intrusions, New Mexico, and relations between evolution of a continental magmatic center and modifications of the lithosphere","docAbstract":"Over 200 H, O, Sr, Nd, and Pb isotope analyses, in addition to geologic and petrologic constraints, document the magmatic evolution of the 28.5-19 Ma Latir volcanic field and associated intrusive rocks, which includes multiple stages of crustal assimilation, magma mixing, protracted crystallization, and open- and closed-system evolution in the upper crust. In contrast to data from younger volcanic centers in northern New Mexico, relatively low and restricted primary ??18O values (+6.4 to +7.4) rule out assimilation of supracrustal rocks enriched in 18O. Initial 87Sr/86Sr ratios (0.705 to 0.708), ??18O values (-2 to-7), and 206Pb/204Pb ratios (17.5 to 18.4) of metaluminous precaldera volcanic rocks and postcaldera plutonic rocks suggest that most Latir rocks were generated by fractional crystallization of substantial volumes of mantle-derived basaltic magma that had near-chondritic Nd isotope ratios, accompanied by assimilation of crustal material in two main stages: 1) assimilation of non-radiogenic lower crust, followed by 2) assimilation of middle and upper crust by inter-mediate-composition magmas that had been contaminated during the first stage. Magmatic evolution in the upper crust peaked with eruption of the peralkaline Amalia Tuff (???26 Ma), which evolved from metaluminous parental magmas. A third stage of late, roofward assimilation of Proterozoic rocks in the Amalia Tuff magma is indicated by trends in initial 87Sr/86Sr and 206Pb/204Pb ratios from 0.7057 to 0.7098 and 19.5 to 18.8, respectively, toward the top of the pre-eruptive magma chamber. Highly evolved postcaldera plutons are generally fine grained and are zoned in initial 87Sr/86Sr and 206Pb/204Pb ratios, varying from 0.705 to 0.709 and 17.8 to 18.6, respectively. In contrast, the coarser-grained Cabresto Lake (???25 Ma) and Rio Hondo (???21 Ma) plutons have relatively homogeneous initial 87Sr/86Sr and 206Pb/204Pb ratios of approximately 0.7053 and 17.94 and 17.55, respectively. ??18O values for all the postcaldera plutons overlap those of the precaldera rocks and Amalia Tuff, except for those for two late-stage rhyolite dikes associated with the Rio Hondo pluton that have ??18O values of-8.6 and-9.5; these dikes are the only Latir rocks which may be largely crustal melts. Chemical and isotopic data from the Latir field suggest that large fluxes of mantle-derived basaltic magma are necessary for developing and sustaining large-volume volcanic centers. Development of a detailed model suggests that 6-15 km of new crust may have been added beneath the volcanic center; such an addition may result in significant changes in the chemical and Sr and Nd isotopic compositions of the crust, although Pb isotope ratios will remain relatively unchanged. If accompanied by assimilation, crystallization of pooled basaltic magma near the MOHO may produce substantial cumulates beneath the MOHO that generate large changes in the isotopic composition of the upper mantle. The Latir field may be similar to other large-volume, long-lived intracratonal volcanic fields that fundamentally owe their origins to extensive injection of basaltic magma into the lower parts of their magmatic systems. Such fields may overlie areas of significant crustal growth and hybridization. ?? 1990 Springer-Verlag.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Contributions to Mineralogy and Petrology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisherLocation":"Springer-Verlag","doi":"10.1007/BF00310649","issn":"00107999","usgsCitation":"Johnson, C., Lipman, P.W., and Czamanske, G., 1990, H, O, Sr, Nd, and Pb isotope geochemistry of the Latir volcanic field and cogenetic intrusions, New Mexico, and relations between evolution of a continental magmatic center and modifications of the lithosphere: Contributions to Mineralogy and Petrology, v. 104, no. 1, p. 99-124, https://doi.org/10.1007/BF00310649.","startPage":"99","endPage":"124","numberOfPages":"26","costCenters":[],"links":[{"id":205357,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/BF00310649"},{"id":223262,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"104","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a2e74e4b0c8380cd5c55b","contributors":{"authors":[{"text":"Johnson, C.M.","contributorId":78707,"corporation":false,"usgs":true,"family":"Johnson","given":"C.M.","email":"","affiliations":[],"preferred":false,"id":373259,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Lipman, P. W.","contributorId":93470,"corporation":false,"usgs":true,"family":"Lipman","given":"P.","middleInitial":"W.","affiliations":[],"preferred":false,"id":373260,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Czamanske, G.K.","contributorId":26300,"corporation":false,"usgs":true,"family":"Czamanske","given":"G.K.","email":"","affiliations":[],"preferred":false,"id":373258,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70016351,"text":"70016351 - 1990 - Rates of microbial metabolism in deep coastal plain aquifers","interactions":[],"lastModifiedDate":"2023-01-26T15:39:24.560346","indexId":"70016351","displayToPublicDate":"1990-01-01T00:00:00","publicationYear":"1990","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":850,"text":"Applied and Environmental Microbiology","active":true,"publicationSubtype":{"id":10}},"title":"Rates of microbial metabolism in deep coastal plain aquifers","docAbstract":"Rates of microbial metabolism in deep anaerobic aquifers of the Atlantic coastal plain of South Carolina were investigated by both microbiological and geochemical techniques. Rates of [2-14C]acetate and [U-14C]glucose oxidation as well as geochemical evidence indicated that metabolic rates were faster in the sandy sediments composing the aquifers than in the clayey sediments of the confining layers. In the sandy aquifer sediments, estimates of the rates of CO2 production (millimoles of CO2 per liter per year) based on the oxidation of [2-14C] acetate were 9.4 × 10−3 to 2.4 × 10−1 for the Black Creek aquifer, 1.1 × 10−2 for the Middendorf aquifer, and <7 × 10−5 for the Cape Fear aquifer. These estimates were at least 2 orders of magnitude lower than previously published estimates that were based on the accumulation of CO2 in laboratory incubations of similar deep subsurface sediments. In contrast, geochemical modeling of groundwater chemistry changes along aquifer flowpaths gave rate estimates that ranged from 10−4 to 10−6 mmol of CO2 per liter per year. The age of these sediments (ca. 80 million years) and their organic carbon content suggest that average rates of CO2 production could have been no more than 10−4 mmol per liter per year. Thus, laboratory incubations may greatly overestimate the in situ rates of microbial metabolism in deep subsurface environments. This has important implications for the use of laboratory incubations in attempts to estimate biorestoration capacities of deep aquifers. The rate estimates from geochemical modeling indicate that deep aquifers are among the most oligotrophic aquatic environments in which there is ongoing microbial metabolism.
","language":"English","publisher":"American Society for Microbiology","doi":"10.1128/aem.56.6.1865-1874.1990","issn":"00992240","usgsCitation":"Chapelle, F.H., and Lovley, D.R., 1990, Rates of microbial metabolism in deep coastal plain aquifers: Applied and Environmental Microbiology, v. 56, no. 6, p. 1865-1874, https://doi.org/10.1128/aem.56.6.1865-1874.1990.","productDescription":"10 p.","startPage":"1865","endPage":"1874","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":479840,"rank":2,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1128/aem.56.6.1865-1874.1990","text":"Publisher Index Page"},{"id":223161,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"South Carolina","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -78.37646484375,\n 33.94335994657882\n ],\n [\n -79.4970703125,\n 34.95799531086792\n ],\n [\n -80.5078125,\n 35.06597313798418\n ],\n [\n -80.85937499999999,\n 35.35321610123823\n ],\n [\n -82.6611328125,\n 35.42486791930558\n ],\n [\n -83.43017578125,\n 35.137879119634185\n ],\n [\n -83.49609375,\n 34.74161249883172\n ],\n [\n -82.94677734375,\n 34.161818161230386\n ],\n [\n -81.9140625,\n 33.15594830078649\n ],\n [\n -81.36474609375,\n 32.32427558887655\n ],\n [\n -81.123046875,\n 31.82156451492074\n ],\n [\n -80.9912109375,\n 31.690781806136822\n ],\n [\n -79.365234375,\n 32.76880048488168\n ],\n [\n -78.68408203124999,\n 33.30298618122413\n ],\n [\n -78.37646484375,\n 33.94335994657882\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"56","issue":"6","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a9543e4b0c8380cd818e1","contributors":{"authors":[{"text":"Chapelle, F. H.","contributorId":101697,"corporation":false,"usgs":true,"family":"Chapelle","given":"F.","email":"","middleInitial":"H.","affiliations":[],"preferred":false,"id":373248,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Lovley, Derek R.","contributorId":107852,"corporation":false,"usgs":true,"family":"Lovley","given":"Derek","middleInitial":"R.","affiliations":[],"preferred":false,"id":373249,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70016342,"text":"70016342 - 1990 - Stability of giant sand waves in eastern Long Island Sound, U.S.A.","interactions":[],"lastModifiedDate":"2024-09-23T11:59:15.538811","indexId":"70016342","displayToPublicDate":"1990-01-01T00:00:00","publicationYear":"1990","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":"Stability of giant sand waves in eastern Long Island Sound, U.S.A.","docAbstract":"A combination of a highly accurate bathymetric surveying technique and in-situ submersible observations and measurements were used to assess the migrational trends and morphological changes of large sand waves (Ht ≤ 17 m) in eastern Long Island Sound. Although residing in a high-energy tidal environment characterized by a net westward sediment flux, the large bedforms are relatively stable over the short term. Over a 7 month period, 55.1% of a total 2942 m of sand wave crestline lengths migrated less than the horizontal accuracy limits of navigation (2 m). Approximately 35% of the remaining sand wave crests migrated less than 4 m. Net migration of the sand wave crests in the study area was 0.2 m. In addition, the bulk form (center of area in profile view) or the base of the sand waves showed little, if any, movement. These data, in conjunction with flow data within the sand wave field, suggest that net migration rates are greater than the time span of this study and/or the sand waves move in response to large residual flows created by high-energy, aperiodic storm events. The latter scenerio suggests that day to day processes only serve to rework and modify the sand waves.
The Anegada Passage (sensu lato) includes several basins and ridges from Southeast of Puerto Rico to the corner of the Virgin Islands Platform. Seabeam (Seacarib I) and Gloria long-range sidescan sonar surveys were carried out in this area. These new data allow us to propose an interpretation of the Anegada Passage. Most of the features described are related to wrench faulting: (a) St Croix and Virgin Islands Basins are pull-apart basins created in a right-lateral strike-slip environment based on their rhomboidal shape and seismic data (e.g. the flower structure). These two pull-aparts are divided into two sub-basins by a curvilinear normal fault in the Virgin Islands Basin and a right-lateral strike-slip fault in the St Croix Basin. (b) Tortola Ridge and a 'dog's leg' shaped structure are inferred to be restraining bends between two right-lateral strike-slip faults. (c) We identified two ENE-WSW volcanic lineaments in the eastern area and one volcano lying between Virgin Islands and St Croix Basins. (d) As shown by the seismic activity main wrench motion occurs along the north slope of Virgin Islands Basin and through Anegada Passage. A branching of this main fault transmits the transtensional motion to St Croix Basin. A two-stage story is proposed for the creation of the basins. A first extensional event during Eocene(?)-Oligocene-lower Miocene time created Virgin Islands, St Croix Basins and the tilted blocks of St Croix Ridge. A second transtensional event from Pliocene to Recent gave the present day pattern to this area. However, the displacement along the strike-slip faults is no more than 15 km long. The proposed geodynamic model is based on the separation of the northeastern Caribbean boundary into two blocks. In the West, the indenter of Beata Ridge gives a northeastern motion to Hispaniola Block. In the East, as a result of Hispaniola Block's motion, the Puerto Rico-Virgin Islands Block could escape in an east-northeast direction.
","language":"English","publisher":"Springer","doi":"10.1007/BF02266712","usgsCitation":"Jany, I., Scanlon, K.M., and Mauffret, A., 1990, Geological interpretation of combined Seabeam, Gloria and seismic data from Anegada Passage (Virgin Islands, north Caribbean): Marine Geophysical Research, v. 12, no. 3, p. 173-196, https://doi.org/10.1007/BF02266712.","productDescription":"24 p.","startPage":"173","endPage":"196","costCenters":[{"id":678,"text":"Woods Hole Coastal and Marine Science Center","active":true,"usgs":true}],"links":[{"id":222955,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"Virgin Islands","otherGeospatial":"Anegada Passage","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -65.1708984375,\n 17.528820674552627\n ],\n [\n -64.0008544921875,\n 17.528820674552627\n ],\n [\n -64.0008544921875,\n 18.63583516062285\n ],\n [\n -65.1708984375,\n 18.63583516062285\n ],\n [\n -65.1708984375,\n 17.528820674552627\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"12","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a2268e4b0c8380cd5700a","contributors":{"authors":[{"text":"Jany, I.","contributorId":29269,"corporation":false,"usgs":true,"family":"Jany","given":"I.","email":"","affiliations":[],"preferred":false,"id":373205,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Scanlon, Kathryn M.","contributorId":6816,"corporation":false,"usgs":true,"family":"Scanlon","given":"Kathryn","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":373206,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Mauffret, A.","contributorId":94921,"corporation":false,"usgs":true,"family":"Mauffret","given":"A.","email":"","affiliations":[],"preferred":false,"id":373207,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70016332,"text":"70016332 - 1990 - Rupture process of a multiple main shock sequence: analysis of teleseismic, local and field observations of the Tennant Creek, Australia, earthquakes of January 22, 1988","interactions":[],"lastModifiedDate":"2024-05-24T15:43:52.901579","indexId":"70016332","displayToPublicDate":"1990-01-01T00:00:00","publicationYear":"1990","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":6453,"text":"Journal of Geophysical Research Solid Earth","active":true,"publicationSubtype":{"id":10}},"title":"Rupture process of a multiple main shock sequence: analysis of teleseismic, local and field observations of the Tennant Creek, Australia, earthquakes of January 22, 1988","docAbstract":"On January 22, 1988, three large intraplate earthquakes (with MS 6.3, 6.4, and 6.7) occurred within a 12-hour period near Tennant Creek, Australia. These earthquakes, which occurred over a small interval of time and within a small volume of space, present a unique opportunity to study the rupture process of the class of intraplate earthquakes that occur as multiple main shocks. Broadband displacement and velocity records of body waves from teleseismically recorded data are analyzed to determine source mechanisms, depths, and complexity of rupture of each of the three main shocks. Hypocenters of an additional 150 foreshocks and aftershocks constrained by local arrival time data and field observations of surface rupture are used to complement the source characteristics of the main shocks in order to derive as complete a description of the rupture process as possible. The interpretation of the combined data sets suggests that the overall rupture process involved unusually complicated stress release. As locations of the main shock hypocenters progressively moved from west to east, we infer that the first and third main shocks, denoted as MS1 and MS3, produced the southeast-northwest trending scarps observed at the western end (the Kunayungku fault) and at the eastern end (the east end of the Lake Surprise fault), respectively, of the rupture zone. The epicenter of the only immediate foreshock was located in the gap between these two fault scarps. MS1 nucleated near this epicenter and ruptured upward and to the northwest from a depth of 6.5 km. MS3 ruptured predominantly to the SE at a depth of 4.5 km. The second main shock, MS2, is inferred to have produced the deformation of the southwest trending central scarp segment (the western end of the Lake Surprise fault). From the sense of thrusting seen at the surface and from the distribution of aftershock hypocenters, the south dipping nodal planes derived from waveform modeling are identified as the fault planes for earthquakes MS1 and MS3. In contrast, the dip of the central fault scarp is reversed relative to the dips of the western and eastern fault scarps. The rupture process Of MS2 turns out to be commensurately complex and sufficiently explains the geological complexity. MS2 consisted of three subevents. The southeast dipping nodal plane of the first two subevents is coplanar with a southeast dipping plane implied by locations of aftershocks which did not break the surface. Choice of the north dipping plane as the rupture plane of the third subevent, consistent with the surface deformation and coplanar with a second plane delineated by aftershocks, would imply conjugate faulting. The majority of the aftershocks are concentrated near the edges of the fault planes, and there is an absence of activity in the center of the planes. The areas of absent activity may represent the failed asperities of the main shocks in which substantial stress relief occurred. The rupture process of each main shock is characterized by the rapid release of energy followed by a much slower release of moment and by aftershock zones whose dimensions exceed the inferred dimensions of the rupture. These characteristics suggest that substantial slow slip occurred on each of the three fault interfaces that was not accompanied by major energy release. The first main shock nucleated at the deepest part of its aftershock zone and ruptured upward. In contrast, MS2 and MS3 nucleated at depths that were one third to one half of the maximum depth of their aftershock zones. This variation of focal depth and the strong increase of moment and radiated energy with each main shock imply that lateral variations of strength were more important than vertical gradients of shear stress in controlling the progression of rupture.
","language":"English","publisher":"American Geophysical Union","doi":"10.1029/JB095iB05p06867","issn":"01480227","usgsCitation":"Choy, G.L., and Bowman, J.R., 1990, Rupture process of a multiple main shock sequence: analysis of teleseismic, local and field observations of the Tennant Creek, Australia, earthquakes of January 22, 1988: Journal of Geophysical Research Solid Earth, v. 95, no. B5, p. 6867-6882, https://doi.org/10.1029/JB095iB05p06867.","productDescription":"16 p.","startPage":"6867","endPage":"6882","numberOfPages":"16","costCenters":[],"links":[{"id":222904,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"95","issue":"B5","noUsgsAuthors":false,"publicationDate":"2012-09-20","publicationStatus":"PW","scienceBaseUri":"505aaed7e4b0c8380cd87253","contributors":{"authors":[{"text":"Choy, G. L. 0000-0002-0217-5555","orcid":"https://orcid.org/0000-0002-0217-5555","contributorId":78322,"corporation":false,"usgs":true,"family":"Choy","given":"G.","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":373203,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Bowman, J. R.","contributorId":29496,"corporation":false,"usgs":false,"family":"Bowman","given":"J.","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":373202,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70016318,"text":"70016318 - 1990 - Crustal strain near the Big Bend of the San Andreas Fault: Analysis of the Los Padres-Tehachapi Trilateration Networks, California","interactions":[],"lastModifiedDate":"2024-05-24T16:19:44.526723","indexId":"70016318","displayToPublicDate":"1990-01-01T00:00:00","publicationYear":"1990","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":6453,"text":"Journal of Geophysical Research Solid Earth","active":true,"publicationSubtype":{"id":10}},"title":"Crustal strain near the Big Bend of the San Andreas Fault: Analysis of the Los Padres-Tehachapi Trilateration Networks, California","docAbstract":"In the region of the Los Padres-Tehachapi geodetic network, the San Andreas fault (SAF) changes its orientation by over 30° from N40°W, close to that predicted by plate motion for a transform boundary, to N73°W. The strain orientation near the SAF is consistent with right-lateral shear along the fault, with maximum shear rate of 0.38±0.01 μrad/yr at N63°W. In contrast, away from the SAF the strain orientations on both sides of the fault are consistent with the plate motion direction, with maximum shear rate of 0.19±0.01 μrad/yr at N44°W. The strain rate does not drop off rapidly away from the fault, and thus the area is fit by either a broad shear zone below the SAF or a single fault with a relatively deep locking depth. The fit to the line length data is poor for locking depth d less than 25 km. For d of 25 km a buried slip rate of 30 ± 6 mm/yr is estimated. We also estimated buried slip for models that included the Garlock and Big Pine faults, in addition to the SAF. Slip rates on other faults are poorly constrained by the Los Padres-Tehachapi network. The best fitting Garlock fault model had computed left-lateral slip rate of 11±2 mm/yr below 10 km. Buried left-lateral slip of 15±6 mm/yr on the Big Pine fault, within the Western Transverse Ranges, provides significant reduction in line length residuals; however, deformation there may be more complicated than a single vertical fault. A subhorizontal detachment on the southern side of the SAF cannot be well constrained by these data. We investigated the location of the SAF and found that a vertical fault below the surface trace fits the data much better than either a dipping fault or a fault zone located south of the surface trace.
","language":"English","publisher":"American Geophysical Union","doi":"10.1029/JB095iB02p01139","issn":"01480227","usgsCitation":"Eberhart-Phillips, D., Lisowski, M., and Zoback, M.D., 1990, Crustal strain near the Big Bend of the San Andreas Fault: Analysis of the Los Padres-Tehachapi Trilateration Networks, California: Journal of Geophysical Research Solid Earth, v. 95, no. B2, p. 1139-1153, https://doi.org/10.1029/JB095iB02p01139.","productDescription":"15 p.","startPage":"1139","endPage":"1153","numberOfPages":"15","costCenters":[],"links":[{"id":223512,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"95","issue":"B2","noUsgsAuthors":false,"publicationDate":"2012-09-20","publicationStatus":"PW","scienceBaseUri":"5059fce3e4b0c8380cd4e4ba","contributors":{"authors":[{"text":"Eberhart-Phillips, D.","contributorId":80428,"corporation":false,"usgs":true,"family":"Eberhart-Phillips","given":"D.","affiliations":[],"preferred":false,"id":373169,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Lisowski, M.","contributorId":70381,"corporation":false,"usgs":true,"family":"Lisowski","given":"M.","email":"","affiliations":[],"preferred":false,"id":373168,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Zoback, Mark D.","contributorId":29431,"corporation":false,"usgs":true,"family":"Zoback","given":"Mark","email":"","middleInitial":"D.","affiliations":[],"preferred":true,"id":901429,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70016317,"text":"70016317 - 1990 - Effect of anelastic and scattering structures of the lithosphere on the shape of local earthquake coda","interactions":[],"lastModifiedDate":"2012-03-12T17:18:41","indexId":"70016317","displayToPublicDate":"1990-01-01T00:00:00","publicationYear":"1990","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3209,"text":"Pure and Applied Geophysics PAGEOPH","active":true,"publicationSubtype":{"id":10}},"title":"Effect of anelastic and scattering structures of the lithosphere on the shape of local earthquake coda","docAbstract":"A simple model of single acoustic scattering is used to study the dependence of the shape of local earthquake coda on the anelastic and scattering structures of the lithosphere. The model is applied to the coda of earthquakes located near Stone Canyon, central California, and provides an explanation for the features observed in the data, which include an interesting temporal variation in the coda shape. A surficial layer with a Q of 50 and thickness of 10 or 25 km underlain by a zone with a Q of 1000 extending to the bottom of the lithosphere, together with a scattering scale length, a, that varies with depth z according to the relation a=0.3 exp[-(z/45)2] are found to constitute the simplest structure of the medium compatible with the coda data and with body and surface wave attenuation data. The profile of heterogeneity sizes implies that the scattering strength increases strongly with depth, a constraint required by the necessity to boost the energy of the later coda without forcing the intrinsic Q to be excessively high in the uppermost mantle. This constraint is viewed as an artifact of the single scattering model which overstimates the scattering coefficient due to the neglect of multiple scattering. The observed temporal variation of the signal is difficult to explain by a simple change of the intrinsic Q at some depth. Rather, it is suggested that the scattering properties at depth changed with time through a variation of the fractional rms velocity fluctuation on the order of one percent. ?? 1990 Birkha??user Verlag.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Pure and Applied Geophysics PAGEOPH","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisherLocation":"Birkha??user-Verlag","doi":"10.1007/BF00874367","issn":"00334553","usgsCitation":"Chouet, B., 1990, Effect of anelastic and scattering structures of the lithosphere on the shape of local earthquake coda: Pure and Applied Geophysics PAGEOPH, v. 132, no. 1-2, p. 289-310, https://doi.org/10.1007/BF00874367.","startPage":"289","endPage":"310","numberOfPages":"22","costCenters":[],"links":[{"id":205373,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/BF00874367"},{"id":223464,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"132","issue":"1-2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a05bfe4b0c8380cd50f2d","contributors":{"authors":[{"text":"Chouet, B.","contributorId":68465,"corporation":false,"usgs":true,"family":"Chouet","given":"B.","affiliations":[],"preferred":false,"id":373167,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70016310,"text":"70016310 - 1990 - Return to ranger submarine slide, Baja California, Mexico","interactions":[],"lastModifiedDate":"2012-03-12T17:18:41","indexId":"70016310","displayToPublicDate":"1990-01-01T00:00:00","publicationYear":"1990","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1742,"text":"Geo-Marine Letters","active":true,"publicationSubtype":{"id":10}},"title":"Return to ranger submarine slide, Baja California, Mexico","docAbstract":"Ranger Slide is a modest (12 km3) slide deposit of Pliocene and younger sediment on the continental slope in northern Sebastian Vizcaino Bay, Mexico. A limited survey using a deeply-towed instrument shows that hummocky terrain immediately downslope from the slide scar consists of large blocks of semiconsolidated sediment, some exceeding a kilometer in length and 107 m3 in volume. Most blocks have rotated, fallen apart, and/or deformed during movement. The form, structure, and processes related to emplacement of the blocks within the hummocky topographic zone of Ranger Slide may be common to many submarine slides on slopes involving semiconsolidated, terrigenous sediment. ?? 1990 Springer-Verlag New York Inc.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Geo-Marine Letters","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisherLocation":"Springer-Verlag","doi":"10.1007/BF02431025","issn":"02760460","usgsCitation":"Normark, W.R., 1990, Return to ranger submarine slide, Baja California, Mexico: Geo-Marine Letters, v. 10, no. 2, p. 81-91, https://doi.org/10.1007/BF02431025.","startPage":"81","endPage":"91","numberOfPages":"11","costCenters":[],"links":[{"id":205361,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/BF02431025"},{"id":223314,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"10","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505aac2ce4b0c8380cd86bca","contributors":{"authors":[{"text":"Normark, W. R.","contributorId":87137,"corporation":false,"usgs":true,"family":"Normark","given":"W.","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":373149,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70016308,"text":"70016308 - 1990 - Formation of anorthosite-Gabbro rhythmic phase layering: an example at North Arm Mountain, Bay of Isands ophiolite","interactions":[],"lastModifiedDate":"2024-06-04T21:12:38.257063","indexId":"70016308","displayToPublicDate":"1990-01-01T00:00:00","publicationYear":"1990","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2420,"text":"Journal of Petrology","active":true,"publicationSubtype":{"id":10}},"title":"Formation of anorthosite-Gabbro rhythmic phase layering: an example at North Arm Mountain, Bay of Isands ophiolite","docAbstract":"Rhythmically layered anorthosite and gabbro are exposed in a 4–10-m thick interval at the base of the layered gabbro unit on North Arm Mountain, one of four massifs that compose the Bay of Islands ophiolite, Newfoundland. Within the rhythmically layered interval, up to 37 anorthosite layers 1–2 cm thick alternate with gabbroic layers 7–10 cm thick. Anorthosites are adcumulates (most contain <6ppm Zr) with 98–99% plagioclase (Plag) and 1–2% intergranular clinopyroxene (Cpx), whereas gabbros are adcumulates to mesocumulates (<6–20ppm Zr) with 35–55% Plag, and the balance olivine (Ol) + Cpx ± orthopyroxene (Opx). Average mineral compositions are: Ol mg-number [100 ×Mg/(Mg + Fe)]=84·9, NiO=0·13wt. % Plag An = 87·9; Cpx mg-number = 88·3, TiO2=0·20 wt %; and Opx mg-number = 85·7. Rare earth element (REE) concentrations in clinopyroxene and plagioclase are low throughout the rhythmically layered interval (<5 times chondrites). The rhythmically layered interval is sandwiched between thick layers of adcumulate to orthocumulate uniform gabbro with average modal proportions of 54% Plag-39% Cpx-3% Ol-4% Opx. Average mineral compositions are: Ol mg-number = 75·5, NiO = 0·08 wt. %; Plag An=69%6; Cpx mg-number = 81·2, TiO2 =0·53 wt. %, and Opx mg-number = 77·5. Clinopyroxene and plagioclase REE abundances are systematically higher in the uniform gabbro interval than in the rhythmically layered interval. Calculated fractional crystallization paths and correlated cryptic variation patterns suggest that uniform and rhythmically layered gabbros represent 20–30% in situ crystallization of two distinct magma batches, one more evolved and the other more primitive. When the more primitive magma entered the crystallization site of the NA300–301 gabbros, it is estimated to have been ∼40°C hotter than the resident evolved magma, and may have been chilled by contact with a magma chamber margin composed of uniform gabbro. In this model, chilling caused the liquid to become supercooled with respect to plagioclase nucleation temperatures, resulting in crystallization of gabbro deficient in plagioclase relative to equilibrium cotectic proportions. Subtraction of a plagioclase-poor melagabbro enriched the liquid in normative plagioclase, which in turn led to crystallization of an anorthosite layer. Alternating anorthosite and gabbro layers in the rhythmically layered interval built up by coupled and sustained variations in crystal nucleation and growth rates, and associated variations in liquid compositions at the crystallization front. Relatively stagnant magma-flow conditions may be required to accumulate substantial thicknesses of rhythmically layered cumulates by sustained oscillatory crystallization. The rarity of anorthosite-gabbro rhythmic phase layering on North Arm Mountain may indicate that convective magma currents in the Bay of Islands magma chamber were too vigorous for oscillatory crystallization to commonly occur.
","language":"English","publisher":"Oxford Academic","doi":"10.1093/petrology/31.1.1","issn":"00223530","usgsCitation":"Komor, S., and Elthon, D., 1990, Formation of anorthosite-Gabbro rhythmic phase layering: an example at North Arm Mountain, Bay of Isands ophiolite: Journal of Petrology, v. 31, no. 1, p. 1-50, https://doi.org/10.1093/petrology/31.1.1.","productDescription":"50 p.","startPage":"1","endPage":"50","numberOfPages":"50","costCenters":[],"links":[{"id":223312,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"31","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a134ee4b0c8380cd545dc","contributors":{"authors":[{"text":"Komor, S.C.","contributorId":21182,"corporation":false,"usgs":true,"family":"Komor","given":"S.C.","email":"","affiliations":[],"preferred":false,"id":373144,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Elthon, D.","contributorId":107434,"corporation":false,"usgs":true,"family":"Elthon","given":"D.","email":"","affiliations":[],"preferred":false,"id":373145,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70016303,"text":"70016303 - 1990 - Recent crustal subsidence at Yellowstone Caldera, Wyoming","interactions":[],"lastModifiedDate":"2012-03-12T17:18:41","indexId":"70016303","displayToPublicDate":"1990-01-01T00:00:00","publicationYear":"1990","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1109,"text":"Bulletin of Volcanology","active":true,"publicationSubtype":{"id":10}},"title":"Recent crustal subsidence at Yellowstone Caldera, Wyoming","docAbstract":"Following a period of net uplift at an average rate of 15??1 mm/year from 1923 to 1984, the east-central floor of Yellowstone Caldera stopped rising during 1984-1985 and then subsided 25??7 mm during 1985-1986 and an additional 35??7 mm during 1986-1987. The average horizontal strain rates in the northeast part of the caldera for the period from 1984 to 1987 were: {Mathematical expression}1 = 0.10 ?? 0.09 ??strain/year oriented N33?? E??9?? and {Mathematical expression}2 = 0.20 ?? 0.09 ??strain/year oriented N57?? W??9?? (extension reckoned positive). A best-fit elastic model of the 1985-1987 vertical and horizontal displacements in the eastern part of the caldera suggests deflation of a horizontal tabular body located 10??5 km beneath Le Hardys Rapids, i.e., within a deep hydrothermal system or within an underlying body of partly molten rhyolite. Two end-member models each explain most aspects of historical unrest at Yellowstone, including the recent reversal from uplift to subsidence. Both involve crystallization of an amount of rhyolitic magma that is compatible with the thermal energy requirements of Yellowstone's vigorous hydrothermal system. In the first model, injection of basalt near the base of the rhyolitic system is the primary cause of uplift. Higher in the magmatic system, rhyolite crystallizes and releases all of its magmatic volatiles into the shallow hydrothermal system. Uplift stops and subsidence starts whenever the supply rate of basalt is less than the subsidence rate produced by crystallization of rhyolite and associated fluid loss. In the second model, uplift is caused primarily by pressurization of the deep hydrothermal system by magmatic gas and brine that are released during crystallization of rhyolite and them trapped at lithostatic pressure beneath an impermeable self-sealed zone. Subsidence occurs during episodic hydrofracturing and injection of pore fluid from the deep lithostatic-pressure zone into a shallow hydrostatic-pressure zone. Heat input from basaltic intrusions is required to maintain Yellowstone's silicic magmatic system and shallow hydrothermal system over time scales longer than about 105 years, but for the historical time period crystallization of rhyolite can account for most aspects of unrest at Yellowstone, including seismicity, uplift, subsidence, and hydrothermal activity. ?? 1990 Springer-Verlag.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Bulletin of Volcanology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisherLocation":"Springer-Verlag","doi":"10.1007/BF00304098","issn":"02588900","usgsCitation":"Dzurisin, D., Savage, J., and Fournier, R., 1990, Recent crustal subsidence at Yellowstone Caldera, Wyoming: Bulletin of Volcanology, v. 52, no. 4, p. 247-270, https://doi.org/10.1007/BF00304098.","startPage":"247","endPage":"270","numberOfPages":"24","costCenters":[],"links":[{"id":205350,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/BF00304098"},{"id":223207,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"52","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a95f3e4b0c8380cd81d1b","contributors":{"authors":[{"text":"Dzurisin, D.","contributorId":76067,"corporation":false,"usgs":true,"family":"Dzurisin","given":"D.","email":"","affiliations":[],"preferred":false,"id":373122,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Savage, J.C. 0000-0002-5114-7673","orcid":"https://orcid.org/0000-0002-5114-7673","contributorId":102876,"corporation":false,"usgs":true,"family":"Savage","given":"J.C.","affiliations":[],"preferred":false,"id":373123,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Fournier, R.O.","contributorId":73584,"corporation":false,"usgs":true,"family":"Fournier","given":"R.O.","email":"","affiliations":[],"preferred":false,"id":373121,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70016297,"text":"70016297 - 1990 - A new planktic foraminifer transfer function for estimating pliocene-Holocene paleoceanographic conditions in the North Atlantic","interactions":[],"lastModifiedDate":"2012-03-12T17:18:42","indexId":"70016297","displayToPublicDate":"1990-01-01T00:00:00","publicationYear":"1990","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2673,"text":"Marine Micropaleontology","active":true,"publicationSubtype":{"id":10}},"title":"A new planktic foraminifer transfer function for estimating pliocene-Holocene paleoceanographic conditions in the North Atlantic","docAbstract":"A new planktic foraminifer transfer function (GSF18) related 5 North Atlantic assemblages to winter and summer sea surface temperature. GSF18, based on recombined and simplified core top census data, preserves most environmental information and reproduces modern North Atlantic conditions with approximately the same accuracy as previous transfer functions, but can be more readily applied to faunal samples ranging in age from Pliocene to Holocene. Transfer function GSF18 has been applied to faunal data from Deep Sea Drilling Project Hole 552A to produce a 2.5 m.y. sea-surface temperature (SST) time series. Estimates show several periods between 2.3 and 4.6 Ma during which mean SST's were both several degrees warmer and several degrees cooler than modern conditions. Between 2.9 and 4.0 Ma SST was generally warmer than modern except for a 250 k.y. interval centered at 3.3 Ma. Maximum SST, with respect to modern conditions, occurred after the cool interval near 3.1 Ma when SST was approximately 3.6??C warmer than present conditions. Comparison of SST estimates with stable isotope data suggest that after peak warming at 3.1 Ma, there was an overall surface water cooling with concomitant build up of global ice volume, culminating in Northern Hemisphere glaciation. This event is also indicated by the presence of ice rafted detritus in 552A sediments at about 2.45 Ma. ?? 1990 Elsevier Science Publishers B.V.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Marine Micropaleontology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/0377-8398(90)90026-I","issn":"03778398","usgsCitation":"Dowsett, H., and Poore, R., 1990, A new planktic foraminifer transfer function for estimating pliocene-Holocene paleoceanographic conditions in the North Atlantic: Marine Micropaleontology, v. 16, no. 1-2, p. 1-23, https://doi.org/10.1016/0377-8398(90)90026-I.","startPage":"1","endPage":"23","numberOfPages":"23","costCenters":[],"links":[{"id":205338,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/0377-8398(90)90026-I"},{"id":223103,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"16","issue":"1-2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059e4ade4b0c8380cd4682a","contributors":{"authors":[{"text":"Dowsett, H.J. 0000-0003-1983-7524","orcid":"https://orcid.org/0000-0003-1983-7524","contributorId":87924,"corporation":false,"usgs":true,"family":"Dowsett","given":"H.J.","affiliations":[],"preferred":false,"id":373106,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Poore, R.Z.","contributorId":35314,"corporation":false,"usgs":true,"family":"Poore","given":"R.Z.","email":"","affiliations":[],"preferred":false,"id":373105,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70016289,"text":"70016289 - 1990 - Adsorption of selenium by amorphous iron oxyhydroxide and manganese dioxide","interactions":[],"lastModifiedDate":"2019-05-01T09:57:13","indexId":"70016289","displayToPublicDate":"1990-01-01T00:00:00","publicationYear":"1990","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":"Adsorption of selenium by amorphous iron oxyhydroxide and manganese dioxide","docAbstract":"This work compares and models the adsorption of selenium and other anions on a neutral to alkaline surface (amorphous iron oxyhydroxide) and an acidic surface (manganese dioxide). Selenium adsorption on these oxides is examined as a function of pH, particle concentration, oxidation state, and competing anion concentration in order to assess how these factors might influence the mobility of selenium in the environment. The data indicate that 1. 1) amorphous iron oxyhydroxide has a greater affinity for selenium than manganese dioxide, 2. 2) selenite [Se(IV)] adsorption increases with decreasing pH and increasing particle concentration and is stronger than selenate [Se(VI)] adsorption on both oxides, and 3. 3) selenate does not adsorb on manganese dioxide. The relative affinity of selenate and selenite for the oxides and the lack of adsorption of selenate on a strongly acidic surface suggests that selenate forms outer-sphere complexes while selenite forms inner-sphere complexes with the surfaces. The data also indicate that the competition sequence of other anions with respect to selenite adsorption at pH 7.0 is phosphate > silicate > molybdate > fluoride > sulfate on amorphous iron oxyhydroxide and molybdate ??? phosphate > silicate > fluoride > sulfate on manganese dioxide. The adsorption of phosphate, molybdate, and silicate on these oxides as a function of pH indicates that the competition sequences reflect the relative affinities of these anions for the surfaces. The Triple Layer surface complexation model is used to provide a quantitative description of these observations and to assess the importance of surface site heterogeneity on anion adsorption. The modeling results suggest that selenite forms binuclear, innersphere complexes with amorphous iron oxyhydroxide and monodentate, inner-sphere complexes with manganese dioxide and that selenate forms outer-sphere, monodentate complexes with amorphous iron oxyhydroxide. The heterogeneity of the oxide surface sites is reflected in decreasing equilibrium constants for selenite with increasing adsorption density and both experimental observations and modeling results suggest that manganese dioxide has fewer sites of higher energy for selenite adsorption than amorphous iron oxyhydroxide. Modeling and interpreting the adsorption of phosphate, molybdate, and silicate on the oxides are made difficult by the lack of constraint in choosing surface species and the fact that equally good fits can be obtained with different surface species. Finally, predictions of anion competition using the model results from single adsorbate systems are not very successful because the model does not account for surface site heterogeneity. Selenite adsorption data from a multi-adsorbate system could be fit if the equilibrium constant for selenite is decreased with increasing anion adsorption density.
","language":"English","publisher":"Elsevier","doi":"10.1016/0016-7037(90)90369-V","issn":"00167037","usgsCitation":"Balistrieri, L.S., and Chao, T.T., 1990, Adsorption of selenium by amorphous iron oxyhydroxide and manganese dioxide: Geochimica et Cosmochimica Acta, v. 54, no. 3, p. 739-751, https://doi.org/10.1016/0016-7037(90)90369-V.","productDescription":"13 p.","startPage":"739","endPage":"751","costCenters":[{"id":191,"text":"Colorado Water Science Center","active":true,"usgs":true},{"id":312,"text":"Geology, Minerals, Energy, and Geophysics Science Center","active":true,"usgs":true}],"links":[{"id":222952,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"54","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059e6fee4b0c8380cd4779c","contributors":{"authors":[{"text":"Balistrieri, Laurie S. 0000-0002-6359-3849 balistri@usgs.gov","orcid":"https://orcid.org/0000-0002-6359-3849","contributorId":1406,"corporation":false,"usgs":true,"family":"Balistrieri","given":"Laurie","email":"balistri@usgs.gov","middleInitial":"S.","affiliations":[{"id":662,"text":"Western Mineral and Environmental Resources Science Center","active":true,"usgs":true},{"id":200,"text":"Coop Res Unit Seattle","active":true,"usgs":true},{"id":312,"text":"Geology, Minerals, Energy, and Geophysics Science Center","active":true,"usgs":true},{"id":191,"text":"Colorado Water Science Center","active":true,"usgs":true}],"preferred":true,"id":761880,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Chao, T. T.","contributorId":31900,"corporation":false,"usgs":true,"family":"Chao","given":"T.","email":"","middleInitial":"T.","affiliations":[],"preferred":false,"id":373087,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70016281,"text":"70016281 - 1990 - Shallow structure and deformation along the San Andreas Fault in Cholame Valley, California, based on high-resolution reflection profiling","interactions":[],"lastModifiedDate":"2024-05-24T16:21:30.621682","indexId":"70016281","displayToPublicDate":"1990-01-01T00:00:00","publicationYear":"1990","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2312,"text":"Journal of Geophysical Research","active":true,"publicationSubtype":{"id":10}},"title":"Shallow structure and deformation along the San Andreas Fault in Cholame Valley, California, based on high-resolution reflection profiling","docAbstract":"The mapped active traces of the San Andreas fault are separated by a 1-km-wide right-stepping offset in Cholame Valley. The geometry of this offset, defined in other strike-slip systems as a releasing bend or a dilational jog, has resulted in the formation of a pullapart basin. Various researchers have inferred that this offset served as a rupture terminus for earthquakes on both strands of the San Andreas fault (1966 Parkfield and 1857 Fort Tejon); thus, this en echelon offset may represent a barrier to the propagation of rupture between two segments of the San Andreas fault. We collected 18 km of high-resolution seismic reflection data specifically designed to image the San Andreas fault zone in the shallow crust surrounding this offset. Four short profiles (≤ 3.3 km long) of Mini-Sosie reflection data (1 s of two-way travel time ≈ 1.5 km deep) were collected perpendicular to the San Andreas fault; three of these profiles were tied by a 7-km-long profile that trended northwest through Cholame Valley, subparallel to the San Andreas fault. A zone of incoherent energy, narrow at the surface but widening with depth, underlies the mapped active traces of the San Andreas fault and abruptly terminates shallow reflections on both sides. The reflection profiles and available well data indicate that west of the mapped active traces of the San Andreas fault the shallow subsurface structure of the crust consists of thin (≤400 m thick), offset packages of reflections, laterally coherent on the scale of tens of meters, overlying deformed clastic sedimentary rocks. East of the San Andreas fault, the structure of the shallow crust in southern Cholame Valley is characterized by thick packages of reflections, laterally coherent on the scale of kilometers, overlying the Franciscan complex. All of the strata east of the fault (within Cholame Valley) dip toward the San Andreas fault and the offset, into an approximately 1-km-deep sedimentary basin abutting the south strand of San Andreas fault. The offset in Cholame Valley is characterized by a gentle downwarping of sediments into the offset, the presence of many small faults and discontinuous reflections (consistent with areally distributed shear) between the traces of the main fault, localized subsidence abutting the main strike-slip fault, the formation of a basin, near the offset, that is about as deep as the jog is wide, and the southward propagation of the deformation associated with the offset. Strain field modeling based on simple geometries of the San Andreas and associated faults successfully predicts the general features of the observed topography and subsurface structure of southern Cholame Valley, including subsidence and basin formation near the offset, a discontinuous San Andreas fault plane, and at least one fault in southeastern Cholame Valley.
","language":"English","publisher":"American Geophysical Union","doi":"10.1029/JB095iB04p05003","issn":"01480227","usgsCitation":"Shedlock, K.M., Brocher, T., and Harding, S., 1990, Shallow structure and deformation along the San Andreas Fault in Cholame Valley, California, based on high-resolution reflection profiling: Journal of Geophysical Research, v. 95, no. B4, p. 5003-5020, https://doi.org/10.1029/JB095iB04p05003.","productDescription":"18 p.","startPage":"5003","endPage":"5020","numberOfPages":"18","costCenters":[],"links":[{"id":222793,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"95","issue":"B4","noUsgsAuthors":false,"publicationDate":"2012-09-20","publicationStatus":"PW","scienceBaseUri":"505b8e3de4b08c986b3187ee","contributors":{"authors":[{"text":"Shedlock, K. M.","contributorId":72805,"corporation":false,"usgs":true,"family":"Shedlock","given":"K.","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":373062,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Brocher, T.M. 0000-0002-9740-839X","orcid":"https://orcid.org/0000-0002-9740-839X","contributorId":69994,"corporation":false,"usgs":true,"family":"Brocher","given":"T.M.","affiliations":[],"preferred":false,"id":373061,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Harding, S.T.","contributorId":99565,"corporation":false,"usgs":true,"family":"Harding","given":"S.T.","email":"","affiliations":[],"preferred":false,"id":373063,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70016280,"text":"70016280 - 1990 - The Stillwater Complex and its anorthosites: an accident of magmatic underplating?","interactions":[],"lastModifiedDate":"2012-03-12T17:18:41","indexId":"70016280","displayToPublicDate":"1990-01-01T00:00:00","publicationYear":"1990","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":738,"text":"American Mineralogist","active":true,"publicationSubtype":{"id":10}},"title":"The Stillwater Complex and its anorthosites: an accident of magmatic underplating?","docAbstract":"The Stillwater Complex, emplaced 2700??40 Ma, is exposed at the edge of a 4000-km2 block of Late Archean rocks that formed 40 to 110 m.y. yearlier. Voluminous plagioclase cumulates (anorthosites) within the Middle Banded series of the complex are difficult to explain either by in situ fractionation of mafic magma or by popular models for mixing of two magma types. Current models for the evolution of the lowermost continental crust by magmatic underplating suggest that a major crust-forming event of about 100 m.y. duration would satisfy geologic and geochemical constraints for the formation of the Stillwater Complex and the related granitoids. -from Authors","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"American Mineralogist","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","issn":"0003004X","usgsCitation":"Czamanske, G., and Bohlen, S., 1990, The Stillwater Complex and its anorthosites: an accident of magmatic underplating?: American Mineralogist, v. 75, no. 1-2, p. 37-45.","startPage":"37","endPage":"45","numberOfPages":"9","costCenters":[],"links":[{"id":222792,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"75","issue":"1-2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505ba910e4b08c986b322022","contributors":{"authors":[{"text":"Czamanske, G.K.","contributorId":26300,"corporation":false,"usgs":true,"family":"Czamanske","given":"G.K.","email":"","affiliations":[],"preferred":false,"id":373059,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Bohlen, S.R.","contributorId":105436,"corporation":false,"usgs":true,"family":"Bohlen","given":"S.R.","email":"","affiliations":[],"preferred":false,"id":373060,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70016270,"text":"70016270 - 1990 - Characteristics, origin, and residence time of saprolite and soil of the Piedmont Upland, Virginia, U.S.A., and model testing using cosmogenic 10Be","interactions":[],"lastModifiedDate":"2013-01-20T20:45:27","indexId":"70016270","displayToPublicDate":"1990-01-01T00:00:00","publicationYear":"1990","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1213,"text":"Chemical Geology","active":true,"publicationSubtype":{"id":10}},"title":"Characteristics, origin, and residence time of saprolite and soil of the Piedmont Upland, Virginia, U.S.A., and model testing using cosmogenic 10Be","docAbstract":"[No abstract available]","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Chemical Geology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Elsevier","doi":"10.1016/0009-2541(90)90148-Z","issn":"00092541","usgsCitation":"Pavich, M., 1990, Characteristics, origin, and residence time of saprolite and soil of the Piedmont Upland, Virginia, U.S.A., and model testing using cosmogenic 10Be: Chemical Geology, v. 84, no. 1-4, p. 15-16, https://doi.org/10.1016/0009-2541(90)90148-Z.","startPage":"15","endPage":"16","numberOfPages":"2","costCenters":[],"links":[{"id":266084,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/0009-2541(90)90148-Z"},{"id":223461,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"84","issue":"1-4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059f4aae4b0c8380cd4be45","contributors":{"authors":[{"text":"Pavich, M.J.","contributorId":70788,"corporation":false,"usgs":true,"family":"Pavich","given":"M.J.","email":"","affiliations":[],"preferred":false,"id":373030,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ]}