No abstract available.
","language":"English","publisher":"Edwards Underground Water District","usgsCitation":"Reeves, R., Rawson, J., and Blakey, J., 1972, Chemical and bacteriological quality of water at selected sites in the San Antonio area, Texas, August 1968-April 1972, 69 p.","productDescription":"69 p.","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":583,"text":"Texas Water Science Center","active":true,"usgs":true}],"links":[{"id":327787,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"57c6aecfe4b0f2f0cebe43f0","contributors":{"authors":[{"text":"Reeves, R.D.","contributorId":95043,"corporation":false,"usgs":true,"family":"Reeves","given":"R.D.","email":"","affiliations":[],"preferred":false,"id":646940,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Rawson, Jack","contributorId":18345,"corporation":false,"usgs":true,"family":"Rawson","given":"Jack","affiliations":[],"preferred":false,"id":646941,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Blakey, J.F.","contributorId":23969,"corporation":false,"usgs":true,"family":"Blakey","given":"J.F.","email":"","affiliations":[{"id":595,"text":"U.S. Geological Survey","active":false,"usgs":true}],"preferred":false,"id":646942,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":1001307,"text":"1001307 - 1972 - A recent record of the meadow jumping mouse, Zapus hudsonius, in subarctic Canada","interactions":[],"lastModifiedDate":"2023-02-16T16:43:12.227203","indexId":"1001307","displayToPublicDate":"1972-01-01T00:00:00","publicationYear":"1972","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":737,"text":"American Midland Naturalist","active":true,"publicationSubtype":{"id":10}},"title":"A recent record of the meadow jumping mouse, Zapus hudsonius, in subarctic Canada","docAbstract":"The occurrence of Zapus hudsonius is confirmed for the area lying N of the Mackenzie River and Great Slave Lake.
","language":"English","publisher":"University of Notre Dame","doi":"10.2307/2424376","usgsCitation":"Krapu, G., and Traugher, D.L., 1972, A recent record of the meadow jumping mouse, Zapus hudsonius, in subarctic Canada: American Midland Naturalist, v. 88, no. 2, p. 467-467, https://doi.org/10.2307/2424376.","productDescription":"1 p.","startPage":"467","endPage":"467","costCenters":[{"id":480,"text":"Northern Prairie Wildlife Research Center","active":true,"usgs":true}],"links":[{"id":130287,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"Canada","state":"Northwest Territories","otherGeospatial":"Mackenzie district","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"coordinates\": [\n [\n [\n -120.26409763086892,\n 66.77107817702284\n ],\n [\n -120.26409763086892,\n 60.64076391260875\n ],\n [\n -111.34901142380068,\n 60.64076391260875\n ],\n [\n -111.34901142380068,\n 66.77107817702284\n ],\n [\n -120.26409763086892,\n 66.77107817702284\n ]\n ]\n ],\n \"type\": \"Polygon\"\n }\n }\n ]\n}","volume":"88","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4b1ae4b07f02db6a8762","contributors":{"authors":[{"text":"Krapu, Gary 0000-0001-8482-6130 gkrapu@usgs.gov","orcid":"https://orcid.org/0000-0001-8482-6130","contributorId":168791,"corporation":false,"usgs":true,"family":"Krapu","given":"Gary","email":"gkrapu@usgs.gov","affiliations":[{"id":480,"text":"Northern Prairie Wildlife Research Center","active":true,"usgs":true}],"preferred":true,"id":310859,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Traugher, David L.","contributorId":302493,"corporation":false,"usgs":true,"family":"Traugher","given":"David","email":"","middleInitial":"L.","affiliations":[{"id":480,"text":"Northern Prairie Wildlife Research Center","active":true,"usgs":true}],"preferred":false,"id":310860,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70171433,"text":"70171433 - 1972 - The relation of periphytic and planktonic algal growth in an estuary to hydrographic factors","interactions":[],"lastModifiedDate":"2016-05-31T12:53:57","indexId":"70171433","displayToPublicDate":"1972-01-01T00:00:00","publicationYear":"1972","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2620,"text":"Limnology and Oceanography","active":true,"publicationSubtype":{"id":10}},"title":"The relation of periphytic and planktonic algal growth in an estuary to hydrographic factors","docAbstract":"No abstract available.
","language":"English","publisher":"ASLO","doi":"10.4319/lo.1972.17.5.0731","usgsCitation":"Welch, E.B., Emery, R.M., Matsuda, R.I., and Dawson, W.A., 1972, The relation of periphytic and planktonic algal growth in an estuary to hydrographic factors: Limnology and Oceanography, v. 17, no. 5, p. 731-737, https://doi.org/10.4319/lo.1972.17.5.0731.","productDescription":"7 p.","startPage":"731","endPage":"737","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":622,"text":"Washington Water Science Center","active":true,"usgs":true}],"links":[{"id":321920,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"17","issue":"5","noUsgsAuthors":false,"publicationDate":"2003-12-22","publicationStatus":"PW","scienceBaseUri":"574eb5dde4b0ee97d51a8413","contributors":{"authors":[{"text":"Welch, Eugene Brummer","contributorId":48947,"corporation":false,"usgs":true,"family":"Welch","given":"Eugene","email":"","middleInitial":"Brummer","affiliations":[],"preferred":false,"id":630966,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Emery, Richard M.","contributorId":169735,"corporation":false,"usgs":false,"family":"Emery","given":"Richard","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":630967,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Matsuda, Robert I.","contributorId":169736,"corporation":false,"usgs":false,"family":"Matsuda","given":"Robert","email":"","middleInitial":"I.","affiliations":[],"preferred":false,"id":630968,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Dawson, William A.","contributorId":46496,"corporation":false,"usgs":true,"family":"Dawson","given":"William","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":630969,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70175672,"text":"70175672 - 1972 - Ground-water discharge from the Edwards and associated limestones, San Antonio area, Texas, 1971","interactions":[],"lastModifiedDate":"2016-08-17T16:02:33","indexId":"70175672","displayToPublicDate":"1972-01-01T00:00:00","publicationYear":"1972","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":2,"text":"State or Local Government Series"},"seriesTitle":{"id":5177,"text":"Edwards Underground Water District Bulletin","active":true,"publicationSubtype":{"id":2}},"seriesNumber":"29","title":"Ground-water discharge from the Edwards and associated limestones, San Antonio area, Texas, 1971","docAbstract":"No abstract available.
","language":"English","publisher":"Edwards Underground Water District","usgsCitation":"Puente, C., 1972, Ground-water discharge from the Edwards and associated limestones, San Antonio area, Texas, 1971: Edwards Underground Water District Bulletin 29, 8 p.","productDescription":"8 p.","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":583,"text":"Texas Water Science Center","active":true,"usgs":true}],"links":[{"id":326771,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"57b58ad1e4b03bcb0104bbca","contributors":{"authors":[{"text":"Puente, Celso","contributorId":36140,"corporation":false,"usgs":true,"family":"Puente","given":"Celso","email":"","affiliations":[],"preferred":false,"id":645992,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70009753,"text":"70009753 - 1972 - Determination of nanogram amounts of bismuth in rocks by substoichiometric isotope dilution analysis","interactions":[],"lastModifiedDate":"2020-12-23T21:47:43.550412","indexId":"70009753","displayToPublicDate":"1972-01-01T00:00:00","publicationYear":"1972","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":760,"text":"Analytica Chimica Acta","active":true,"publicationSubtype":{"id":10}},"title":"Determination of nanogram amounts of bismuth in rocks by substoichiometric isotope dilution analysis","docAbstract":"A rapid procedure suitable for the routine determination of 1–10 ng of bismuth in a silicate rock matrix is described. Results for the U.S. Geological Survey standard rocks are presented. Rocks and minerals are dissolved in hydrofluoric-perchloric acid in the presence of 207Bi tracer and the silica is removed by evaporation. The perchloric acid residue is taken up in water and bismuth iodide is extracted into methyl isobutyl ketone. After three acid-iodide washes, the bismuth is stripped into water and reacted with a substoichiometric amount of EDTA. Excess of bismuth is extracted as the iodide and the specific activity of the bismuth-EDTA complex is determined.
This brief report summarizes three sets of measurement data on certain processes.
The first concerns the rate of movement of soil on hillslopes, especially by mass movement or slow gravitational creep. The results are abstracted from an unpublished manuscript by the junior author who reports on the measurements which Leopold began 10 or more years ago and to which in more recent years Emmett has added new sites and has carried on the annual remeasurement. The results are those from \"mass-movement lines\", which consist of a series of pins or iron rods, 10 inches (25 cm) long driven vertically into the ground along a straight line-of-sight, secured at each end with stiff iron posts. The Survey consists of setting a theodolite over one of the end bench marks and orienting on the other. The distance of each individual pin from the line of sight is recorded. Resurveys are usually made annually.
","language":"English","publisher":"Institute of Geography and Spatial Organization Polish Academy of Sciences","usgsCitation":"Leopold, L.B., and Emmett, W.W., 1972, Some rates of geomorphological processes: Geographia Polonica, v. 23, p. 27-36.","productDescription":"10 p.","startPage":"27","endPage":"36","costCenters":[],"links":[{"id":338514,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":338513,"rank":1,"type":{"id":15,"text":"Index Page"},"url":"https://www.geographiapolonica.pl/article/item/8673.html"}],"volume":"23","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"58dcc823e4b02ff32c685766","contributors":{"authors":[{"text":"Leopold, Luna Bergere","contributorId":93884,"corporation":false,"usgs":true,"family":"Leopold","given":"Luna","email":"","middleInitial":"Bergere","affiliations":[],"preferred":false,"id":686711,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Emmett, William W.","contributorId":68715,"corporation":false,"usgs":true,"family":"Emmett","given":"William","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":686712,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":1013983,"text":"1013983 - 1972 - Mixtures of malachite green and formalin for controlling Icthyophthirius and other protozoan parasites of fish","interactions":[],"lastModifiedDate":"2025-08-04T16:27:01.955009","indexId":"1013983","displayToPublicDate":"1972-01-01T00:00:00","publicationYear":"1972","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3196,"text":"Progressive Fish-Culturist","active":true,"publicationSubtype":{"id":10}},"title":"Mixtures of malachite green and formalin for controlling Icthyophthirius and other protozoan parasites of fish","docAbstract":"No abstract available.
","language":"English","publisher":"Wiley","doi":"10.1577/1548-8640(1972)34[21:MOMGAF]2.0.CO;2","usgsCitation":"Leteux, F., and Meyer, F.P., 1972, Mixtures of malachite green and formalin for controlling Icthyophthirius and other protozoan parasites of fish: Progressive Fish-Culturist, v. 34, no. 1, p. 21-26, https://doi.org/10.1577/1548-8640(1972)34[21:MOMGAF]2.0.CO;2.","productDescription":"6 p.","startPage":"21","endPage":"26","costCenters":[{"id":365,"text":"Leetown Science Center","active":true,"usgs":true}],"links":[{"id":131943,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"34","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4b05e4b07f02db699a92","contributors":{"authors":[{"text":"Leteux, F.","contributorId":38835,"corporation":false,"usgs":true,"family":"Leteux","given":"F.","email":"","affiliations":[],"preferred":false,"id":319559,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Meyer, Fred P.","contributorId":28642,"corporation":false,"usgs":true,"family":"Meyer","given":"Fred","email":"","middleInitial":"P.","affiliations":[],"preferred":false,"id":319560,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70010142,"text":"70010142 - 1972 - Occurrence of chromian, hercynitic spinel (\"pleonaste\") in Apollo-14 samples and its petrologic implications","interactions":[],"lastModifiedDate":"2020-12-23T01:13:11.010862","indexId":"70010142","displayToPublicDate":"1972-01-01T00:00:00","publicationYear":"1972","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1427,"text":"Earth and Planetary Science Letters","active":true,"publicationSubtype":{"id":10}},"title":"Occurrence of chromian, hercynitic spinel (\"pleonaste\") in Apollo-14 samples and its petrologic implications","docAbstract":"Many isolated grains of a reddish pleonaste-type spinel occur in fines and metabreccia samples, particularly 14 319. Electron microprobe analyses (104) of spinels and their associated phases include 58 of pleonaste which show Mg/(Mg + Fe) 0.44–0.62 and Cr/(Cr + Al) 0.017–0.134 (atomic), plus minor amounts of other ions, and differ greatly from almost all previously recorded lunar spinels; almost no spinels of intermediate composition were found. Two types of compositional zoning exist: a diffuse primary one with cores lower in Ti, and a narrow secondary one from reaction with matrix yielding rims higher in Cr, Ti, and Mn. At contacts with breccia matrix there is a narrow corona of almost pure plagioclase (An80-An94), free of opaque minerals and pyroxene. Two types of solid inclusions found in the pleonaste are calcic plagioclase, and tiny spherical masses of nickel-rich sulfide.
Similar pleonaste occurs in crystalline rock clasts, mainly with plagioclase; one clast (A) consists only of coarse olivine, plagioclase, and pleonaste, with granulated grain boundaries suggestive of deformation. From composition and texture, this clast is one possible candidate for the mafic cumulate counterpart of the “anorthositic” crust. Another clast (B), also made solely of olivine, plagioclase and pleonaste, is itself a breccia. These data suggest a two-stage brecciation process: 1) disruption (probably pre-Imbrian) of a deep-seated pleonaste-bearing source rock like A and reconsolidation to form a breccia without addition of pyroxene, ilmenite or other minerals; and 2) disruption of this breccia to yield breccia clast B which was then incorporated into the Fra Mauro formation.
The equilibrium distributions of solute species of aluminum at 25°C and one atmosphere pressure are shown graphically in systems containing fluoride, as functions of the total dissolved aluminum and fluoride. The predominant form of complex and degree of complexing are also shown graphically as functions of pH and fluoride activity. The graphs are based on the simultaneous solution of the equations representing nine complexing equilibria and three stoichiometric summarizations, using a fixed value of ionic strength equal to 0.1. Solubility relationships for aluminum hydroxide and cryolite also are shown graphically, using the same coordinates and additional equilibria. By overlaying an appropriate species distribution graph with a solubility graph a relatively complete summary of chemical relationships in an aqueous aluminum system can be obtained. Although this type of model has important limitations, it can accommodate enough variables simultaneously to have practical value and similar procedures could be used for other elements and systems of interest in low-temperature aqueous geochemistry.
Materials of possible volcanic origin in the lunar highlands include (1) highland plains materials, (2) materials forming closely spaced hills in which summit furrows and chains of craters are common and (3) materials forming closely spaced hills (some of which parallel the lunar grid) on which summit furrows and chain craters are rare. The highland plains materials probably are basaltic lavas with less Fe and Ti than the mare plains materials. The two hilly units appear to consist of materials that, if volcanic, were more viscous in the molten state than any of the lunar plains units; thus these materials may be significantly enriched in felsic components. Most of the highland materials of possible volcanic origin formed after the Imbrium multi-ring basin but before mare material completed flooding parts of the moon; they therefore postdate accretion of the moon and may represent several episodes of premare volcanism.
Atmospheric phenomena appearing in the Mariner 9 television pictures are discussed in detail. The surface of the planet was heavily obscured by a global dust storm during the first month in orbit. Brightness data during this period can be fitted by a semi-infinite scattering and absorbing atmosphere model with a single-scattering albedo in the range 0.70–0.85. This low value suggests that the mean radius of the particles responsible for the obscuration was at least 10 μm. By the end of the second month, this dust storm had largely dissipated, leaving a residual optical depth ∼0.1. Much of the region north of 45°N was covered by variable clouds comprising the north polar hood. The cloud structures revealed extensive systems of lee waves generated by west-to-east flow over irregular terrain. Extensive cloud systems in this region resembled baroclinic wave cyclones. Clouds were also observed over several of the large calderas; these clouds are believed to contain water ice. Several localized dust storms were seen after the global dust storm cleared. These dust clouds appeared to be intensely convective. The convective nature of these storms and the stirring of large dust particles to great heights can be explained by vertical velocities generated by the absorption of solar radiation by the dusty atmosphere.
The linear combination technique, when applied to a gamma-ray spectrum, gives a single number indicative of the extent to which the spectral lines of a sought element are present in a complex spectrum. Spectra are taken of the sought element and of various other substances whose spectra interfere with that of the sought element. A weighting function is then computed for application to spectra of unknown materials. The technique was used to determine calcium by radiative-neutron-capture gamma-ray analysis in the presence of interfering elements, notably titanium, and the results were compared with those for two popular methods of peak area integration. Although linearity of response was similar for the methods, the linear combination technique was much better at rejecting interferences. For analyses involving mixtures of unknown composition the technique consequently offers improved sensitivity.
Biscalitheca suzanneana, n. sp., is described from specimens found in an uppermost Pennsylvanian deposit in north-central Texas. The genus was identified primarily on the basis of impressions of the unique sporangial annuli. The occurrence establishes for Biscalitheca a stratigraphic range equivalent to nearly the entire Upper Pennsylvanian Series.
An experiment centering around a mass spectrometer is described, which is aimed at the identification of organic substances present in the top 10 cm of the surface of Mars and an analysis of the atmosphere for major and minor constituents as well as isotopic abundances. In addition, an indication of the abundance of water in the surface and some information concerning the mineralogy can be obtained by monitoring the gases produced upon heating the soil sample.
The organic material will simply be expelled by heating to 150°, 300°, and 500° into the carrier gas stream of a gas chromatograph interfaced to the mass spectrometer or by slowly heating the sample in direct communication with the spectrometer. It is planned to analyze a total of up to nine soil samples in order to study diurnal and seasonal variations. The system is designed to give useful data even for minor constituents if the total of organics should be as low as 5ppm. The spectrometer covers the mass range of 12–200 with adequate resolution.
The results of these experiments, which are deliberately designed to cover a wide spectrum of possibilities independent of terrestrial models, are expected to produce a good picture of the planet's organic chemistry and its possible biological significance as well as allow conclusions regarding the history of the planet's atmosphere.
","language":"English","publisher":"Elsevier","doi":"10.1016/0019-1035(72)90140-6","issn":"00191035","usgsCitation":"Anderson, D.M., Biemann, K., Orgel, L.E., Oro, J., Owen, T., Shulman, G.P., Toulmin, P., and Urey, H.C., 1972, Mass spectrometric analysis of organic compounds, water and volatile constituents in the atmosphere and surface of Mars: The Viking Mars Lander: Icarus, v. 16, no. 1, p. 111-138, https://doi.org/10.1016/0019-1035(72)90140-6.","startPage":"111","endPage":"138","numberOfPages":"28","costCenters":[],"links":[{"id":219288,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"16","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a5255e4b0c8380cd6c328","contributors":{"authors":[{"text":"Anderson, Duwayne M.","contributorId":191734,"corporation":false,"usgs":false,"family":"Anderson","given":"Duwayne","email":"","middleInitial":"M.","affiliations":[{"id":33087,"text":"Cold Regions Research and Engineering Laboratory","active":true,"usgs":false}],"preferred":false,"id":358109,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Biemann, K.","contributorId":76065,"corporation":false,"usgs":true,"family":"Biemann","given":"K.","email":"","affiliations":[],"preferred":false,"id":358112,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Orgel, Leslie E.","contributorId":50652,"corporation":false,"usgs":false,"family":"Orgel","given":"Leslie","email":"","middleInitial":"E.","affiliations":[{"id":33348,"text":"Salk Institute for Biological Studies, San Diego, CA","active":true,"usgs":false}],"preferred":false,"id":358111,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Oro, John","contributorId":21683,"corporation":false,"usgs":false,"family":"Oro","given":"John","email":"","affiliations":[{"id":33349,"text":"Department of Biophysical Science, University of Houston","active":true,"usgs":false}],"preferred":false,"id":358108,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Owen, Tobias","contributorId":103788,"corporation":false,"usgs":false,"family":"Owen","given":"Tobias","affiliations":[],"preferred":false,"id":358114,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Shulman, Garson P.","contributorId":16155,"corporation":false,"usgs":false,"family":"Shulman","given":"Garson","email":"","middleInitial":"P.","affiliations":[{"id":7023,"text":"Jet Propulsion Laboratory, California Institute of Technology","active":true,"usgs":false}],"preferred":false,"id":358107,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Toulmin, Priestley III","contributorId":8522,"corporation":false,"usgs":false,"family":"Toulmin","given":"Priestley","suffix":"III","email":"","affiliations":[{"id":12805,"text":"Univ. of California at San Diego","active":true,"usgs":false}],"preferred":false,"id":358113,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Urey, H. C.","contributorId":44284,"corporation":false,"usgs":true,"family":"Urey","given":"H.","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":358110,"contributorType":{"id":1,"text":"Authors"},"rank":8}]}} ,{"id":70010282,"text":"70010282 - 1972 - Electron microprobe evaluation of terrestrial basalts for whole-rock K-Ar dating","interactions":[],"lastModifiedDate":"2020-12-23T00:26:40.435978","indexId":"70010282","displayToPublicDate":"1972-01-01T00:00:00","publicationYear":"1972","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1427,"text":"Earth and Planetary Science Letters","active":true,"publicationSubtype":{"id":10}},"title":"Electron microprobe evaluation of terrestrial basalts for whole-rock K-Ar dating","docAbstract":"Four basalt samples for whole-rock K-Ar dating were analyzed with an electron microprobe to locate potassium concentrations. Highest concentrations of potassium were found in those mineral phases which were the last to crystallize. The two reliable samples had potassium concentrated in fine-grained interstitial feldspar and along grain boundaries of earlier formed plagioclase crystals. The two unreliable samples had potassium concentrated in the glassy matrix, demonstrating the ineffectiveness of basaltic glass as a retainer of radiogenic argon. In selecting basalt samples for whole-rock K-Ar dating, particular emphasis should be placed on determining the nature and condition of the fine-grained interstitial phases.
Three trifluorobenzenes were prepared by reaction of the corresponding trichlorobenzenes with potassium fluoride or pottassium fluoride-cesium fluoride mixtures in dimethyl sulfone. Molar yields were 12.8% for 1,2,3-, 8.3% for 1,2,4-, and 56.2% for 1,3,5-. Improved yields of the 1,2,3- (23.9%) and the 1,2,4- (34.0%) trifluorobenzenes were obtained from certain partially fluorinated intermediates. Several chlorofluorobenzene intermediates were obtained in goods yields by careful control of the reaction variables. The instability of the polyfluorobenzenes in the halogen-exchange reaction medium explains, in part, why only limited yields of the polyfluorobenzenes are obtained by using this method.
The Luna 16 landing site is similar in its geologic setting to Apollos 11 and 12. All three sites are located on basaltic mare fill which occurs mostly within multi-ring basins formed by impact earlier in the moon's history. A regolith developed by impact bombardment is present at each of these sites. The regolith is composed mostly of locally derived volcanic material, but also contains exotic fine fragments that have been ballistically transported into the landing sites by large impact events which formed craters such as Langrenus and Copernicus. These exotic fragments probably consist mostly of earlier reworked multi-ring basin debris and, although not directly traceable to individual sources, they do represent a good statistical sample of the composition of most of the premare terrac regions.
The general objectives of the Imaging Experiment on the Viking Orbiter are to aid the selection of Viking Lander sites, to map and monitor the chosen sites during lander operations, to aid in the selection of future landing sites, and to extend our knowledge of the planet. The imaging system consists of two identical vidicon cameras each attached to a 1026 mm T/8 telescope giving approximately 1° square field of view. From an altitude of 1500 km the picture elements will be approximately 24m apart. The vidicon is coupled with an image intensifier which provides increased sensitivity and permits electronic shuttering and image motion compensation. A vidicon readout time of 2.24 sec enables pictures to be taken in rapid sequence for contiguous coverage at high resolution. The camera differs from those previously flown to Mars by providing contiguous coverage at high resolution on a single orbital pass, by having sufficient sensitivity to use narrow band color filters at maximum resolution, and by having response in the ultraviolet. These capabilities will be utelized to supplement lander observations and to extend our knowledge particularly of volcanic, erosional, and atmospheric phenomena on Mars.
Mariner 9 photographs of Phobos and Deimos have yielded new information about the orbits, rotation periods, sizes, shapes, and surface characteristics of the satellites. Both satellites appear to be in synchronous rotation. They are irregular, heavily cratered bodies whose shapes appear to have been determined largely by impact fragmentation and spalling. The surfaces of both satellites have crater densities close to saturation and nearly identical, very low albedos. Lower limits on the tensile and yield strengths are estimated, and it is concluded that both satellites may consist of well-consolidated, though possibly highly fractured material.
","language":"English","publisher":"Elsevier","doi":"10.1016/0019-1035(72)90007-3","issn":"00191035","usgsCitation":"Pollack, J.B., Veverka, J., Noland, M., Sagan, C., Hartmann, W., Duxbury, T.C., Born, G., Milton, D., and Smith, B., 1972, Mariner 9 television observations of Phobos and Deimos: Icarus, v. 17, no. 2, p. 394-407, https://doi.org/10.1016/0019-1035(72)90007-3.","productDescription":"14 p.","startPage":"394","endPage":"407","numberOfPages":"14","costCenters":[],"links":[{"id":218991,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"17","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a51f6e4b0c8380cd6c071","contributors":{"authors":[{"text":"Pollack, James B.","contributorId":12616,"corporation":false,"usgs":true,"family":"Pollack","given":"James","email":"","middleInitial":"B.","affiliations":[],"preferred":false,"id":358043,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Veverka, J.","contributorId":71689,"corporation":false,"usgs":true,"family":"Veverka","given":"J.","email":"","affiliations":[],"preferred":false,"id":358049,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Noland, M.","contributorId":31521,"corporation":false,"usgs":true,"family":"Noland","given":"M.","email":"","affiliations":[],"preferred":false,"id":358046,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Sagan, C.","contributorId":42336,"corporation":false,"usgs":true,"family":"Sagan","given":"C.","email":"","affiliations":[],"preferred":false,"id":358047,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Hartmann, W.K.","contributorId":96002,"corporation":false,"usgs":true,"family":"Hartmann","given":"W.K.","email":"","affiliations":[],"preferred":false,"id":358051,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Duxbury, T. C.","contributorId":91983,"corporation":false,"usgs":true,"family":"Duxbury","given":"T.","email":"","middleInitial":"C.","affiliations":[{"id":36392,"text":"Jet Propulsion Laboratory","active":true,"usgs":false}],"preferred":false,"id":358050,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Born, G.H.","contributorId":22487,"corporation":false,"usgs":true,"family":"Born","given":"G.H.","email":"","affiliations":[],"preferred":false,"id":358045,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Milton, D.J.","contributorId":44121,"corporation":false,"usgs":true,"family":"Milton","given":"D.J.","email":"","affiliations":[],"preferred":false,"id":358048,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Smith, B.A.","contributorId":17616,"corporation":false,"usgs":true,"family":"Smith","given":"B.A.","email":"","affiliations":[],"preferred":false,"id":358044,"contributorType":{"id":1,"text":"Authors"},"rank":9}]}} ,{"id":70010128,"text":"70010128 - 1972 - Geological framework of the south polar region of Mars","interactions":[],"lastModifiedDate":"2020-12-23T01:26:10.222017","indexId":"70010128","displayToPublicDate":"1972-01-01T00:00:00","publicationYear":"1972","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1963,"text":"Icarus","active":true,"publicationSubtype":{"id":10}},"title":"Geological framework of the south polar region of Mars","docAbstract":"The first 4 months of Mariner 9 photography of the south polar region are discussed. Three major geological units have been recognized, separated by erosional unconformities. From oldest to youngest they are: cratered terrain, pitted plains, and laminated terrain. The latter unit is unique in occurrence to the polar region, volatiles are probably involved in its origin, and may still be present within the laminated terrain as layered ice.
The residual south polar cap has been observed to survive the disappearance of the thin annual CO2 frost deposit and to last virtually unchanged in outline through the southern summer. That exposed deposit is inferred to be composed of water-ice. The residual cap appears to lie at the apex of an unusual quasi-circular structure composed of laminated terrain; a similar structure also appears to exist near the north pole.
","language":"English","publisher":"Elsevier","doi":"10.1016/0019-1035(72)90004-8","issn":"00191035","usgsCitation":"Murray, B.C., Soderblom, L., Cutts, J., Sharp, R., Milton, D., and Leighton, R., 1972, Geological framework of the south polar region of Mars: Icarus, v. 17, no. 2, p. 328-345, https://doi.org/10.1016/0019-1035(72)90004-8.","productDescription":"18 p.","startPage":"328","endPage":"345","numberOfPages":"18","costCenters":[],"links":[{"id":218990,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"17","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a2264e4b0c8380cd56fdb","contributors":{"authors":[{"text":"Murray, B. C.","contributorId":49870,"corporation":false,"usgs":false,"family":"Murray","given":"B.","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":358040,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Soderblom, L.A. 0000-0002-0917-853X","orcid":"https://orcid.org/0000-0002-0917-853X","contributorId":6139,"corporation":false,"usgs":true,"family":"Soderblom","given":"L.A.","affiliations":[],"preferred":false,"id":358037,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Cutts, J.A.","contributorId":56790,"corporation":false,"usgs":true,"family":"Cutts","given":"J.A.","email":"","affiliations":[],"preferred":false,"id":358041,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Sharp, R.P.","contributorId":6993,"corporation":false,"usgs":true,"family":"Sharp","given":"R.P.","email":"","affiliations":[],"preferred":false,"id":358038,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Milton, D.J.","contributorId":44121,"corporation":false,"usgs":true,"family":"Milton","given":"D.J.","email":"","affiliations":[],"preferred":false,"id":358039,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Leighton, R.B.","contributorId":73745,"corporation":false,"usgs":true,"family":"Leighton","given":"R.B.","email":"","affiliations":[],"preferred":false,"id":358042,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}} ,{"id":70010145,"text":"70010145 - 1972 - Silicate melt inclusions and glasses in lunar soil fragments from the Luna 16 core sample","interactions":[],"lastModifiedDate":"2020-12-23T01:03:18.549469","indexId":"70010145","displayToPublicDate":"1972-01-01T00:00:00","publicationYear":"1972","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1427,"text":"Earth and Planetary Science Letters","active":true,"publicationSubtype":{"id":10}},"title":"Silicate melt inclusions and glasses in lunar soil fragments from the Luna 16 core sample","docAbstract":"More than 2000 fragments were studied microscopically, and electron microprobe analyses were made of 39 selected areas, from a few square mm of polished surface, through 75- to 425-μm fragments of lunar soil from two samples of the Luna 16 core. The silicate melt inclusions and glasses differ in important details from those observed earlier in the Apollo samples. Melt inclusions in olivine contain epitaxially oriented daughter crystals, but also show a similar epitaxy around the outside of the crystals not observed in previous lunar samples. Melt inclusions in ilmenite suggest trapping at successive stages in a differentiation sequence. There is abundant evidence for late-stage silicate liquid immiscibility, with melt compositions similar but not identical to those from Apollo 11 and 12. A comparison of the alkali ratio of any given bulk rock analysis with that of its late-stage, high-silica melt shows gross differences for different rocks. This is pertinent to understanding late-stage differentiation processes. Glass fragments and spherules exhibit a wide range of crystallization textures, reflecting their wide range of compositions and cooling histories. No significant differences were found between the two portions of core examined (Zones A and D).
The San Andreas fault is viewed, according to the concepts of seafloor spreading and plate tectonics, as a transform fault that separates the Pacific and North American plates and along which relative movements of 2 to 6 cm/year have been taking place. The resulting strain can be released by creep, by earthquakes of moderate size, or (as near San Francisco and Los Angeles) by great earthquakes. Microearthquakes, as mapped by a dense seismograph network in central California, generally coincide with zones of the San Andreas fault system that are creeping. Microearthquakes are few and scattered in zones where elastic energy is being stored. Changes in the rate of strain, as recorded by tiltmeter arrays, have been observed before several earthquakes of about magnitude 4. Changes in fluid pressure may control timing of seismic activity and make it possible to control natural earthquakes by controlling variations in fluid pressure in fault zones. An experiment in earthquake control is underway at the Rangely oil field in Colorado, where the rates of fluid injection and withdrawal in experimental wells are being controlled.
","language":"English","publisher":"Elsevier","doi":"10.1016/0040-1951(72)90080-7","issn":"00401951","usgsCitation":"Healy, J.H., Lee, W., Pakiser, L.C., Raleigh, C., and Wood, M., 1972, Prospects for earthquake prediction and control: Tectonophysics, v. 14, no. 3-4, p. 319-332, https://doi.org/10.1016/0040-1951(72)90080-7.","productDescription":"14 p.","startPage":"319","endPage":"332","numberOfPages":"14","costCenters":[],"links":[{"id":219297,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"California","otherGeospatial":"San Andreas Fault","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -122.29980468749999,\n 35.06597313798418\n ],\n [\n -117.24609374999999,\n 35.06597313798418\n ],\n [\n -117.24609374999999,\n 42.13082130188811\n ],\n [\n -122.29980468749999,\n 42.13082130188811\n ],\n [\n -122.29980468749999,\n 35.06597313798418\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"14","issue":"3-4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a8f57e4b0c8380cd7f6e6","contributors":{"authors":[{"text":"Healy, J. H.","contributorId":48968,"corporation":false,"usgs":true,"family":"Healy","given":"J.","email":"","middleInitial":"H.","affiliations":[],"preferred":false,"id":358553,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Lee, W.H.K.","contributorId":35303,"corporation":false,"usgs":true,"family":"Lee","given":"W.H.K.","affiliations":[],"preferred":false,"id":358551,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Pakiser, L. C.","contributorId":83512,"corporation":false,"usgs":true,"family":"Pakiser","given":"L.","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":358555,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Raleigh, C.B.","contributorId":40219,"corporation":false,"usgs":true,"family":"Raleigh","given":"C.B.","email":"","affiliations":[],"preferred":false,"id":358552,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Wood, M.D.","contributorId":63930,"corporation":false,"usgs":true,"family":"Wood","given":"M.D.","email":"","affiliations":[],"preferred":false,"id":358554,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}} ,{"id":70010080,"text":"70010080 - 1972 - A comparison of radiative capture with decay gamma-ray method in bore hole logging for economic minerals","interactions":[],"lastModifiedDate":"2019-11-19T07:22:07","indexId":"70010080","displayToPublicDate":"1972-01-01T00:00:00","publicationYear":"1972","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2906,"text":"Nuclear Instruments and Methods","active":true,"publicationSubtype":{"id":10}},"title":"A comparison of radiative capture with decay gamma-ray method in bore hole logging for economic minerals","docAbstract":"The recent availability of borehole logging sondes employing a source of neutrons and a Ge(Li) detector opens up the possibility of analyzing either decay or capture gamma rays. The most efficient method for a given element can be predicted by calculating the decay-to-capture count ratio for the most prominent peaks in the respective spectra. From a practical point of view such a calculation must be slanted toward short irradiation and count times at each station in a borehole. A simplified method of computation is shown, and the decay-to-capture count ratio has been calculated and tabulated for the optimum value in the decay mode irrespective of the irradiation time, and also for a ten minute irradiation time. Based on analysis of a single peak in each spectrum, the results indicate the preferred technique and the best decay or capture peak to observe for those elements of economic interest.
","language":"English","publisher":"Elsevier","doi":"10.1016/0029-554X(72)90601-5","issn":"0029554X","usgsCitation":"Senftle, F.E., Moxham, R., and Tanner, A., 1972, A comparison of radiative capture with decay gamma-ray method in bore hole logging for economic minerals: Nuclear Instruments and Methods, v. 104, no. 3, p. 485-492, https://doi.org/10.1016/0029-554X(72)90601-5.","productDescription":"8 p. ","startPage":"485","endPage":"492","numberOfPages":"8","costCenters":[],"links":[{"id":219427,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"104","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059e371e4b0c8380cd4600d","contributors":{"authors":[{"text":"Senftle, F. E.","contributorId":47788,"corporation":false,"usgs":true,"family":"Senftle","given":"F.","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":357853,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Moxham, R.M.","contributorId":42234,"corporation":false,"usgs":true,"family":"Moxham","given":"R.M.","email":"","affiliations":[],"preferred":false,"id":357851,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Tanner, A.B.","contributorId":44155,"corporation":false,"usgs":true,"family":"Tanner","given":"A.B.","email":"","affiliations":[],"preferred":false,"id":357852,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70010126,"text":"70010126 - 1972 - Structural profile of the northwestern Caribbean","interactions":[],"lastModifiedDate":"2018-09-21T10:43:27","indexId":"70010126","displayToPublicDate":"1972-01-01T00:00:00","publicationYear":"1972","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1427,"text":"Earth and Planetary Science Letters","active":true,"publicationSubtype":{"id":10}},"title":"Structural profile of the northwestern Caribbean","docAbstract":"A seismic reflection and gravity profile across the continental margin of the Yucatan Peninsula, Yucatan Basin, Cayman Ridge, and Cayman Trough suggests that sediments in the Yucatan Basin consist of a thick succession of beds dominated by turbidites that overlie a thick but irregular sequence of beds, probably dominated by pelagic deposits. The so-called “Carib beds”, present elsewhere in the Caribbean, are not evident in the part of the basin crossed by this profile. The sedimentary section rests on a acoustic basement that probably represents the top of oceanic layer 2. A gravity model indicates that the crust beneath the Yucatan Basin is thin and therefore probably is oceanic in character. The crust thickens southward under the Cayman Ridge but thins again beneath the Cayman Trough. This local thickening is consistent with the suggestion that the Cayman Ridge is a rifted part of the Nicaraguan Rise.
","language":"English","publisher":"Elsevier","doi":"10.1016/0012-821X(72)90273-7","issn":"0012821X","usgsCitation":"Dillon, W.P., Vedder, J.G., and Graf, R., 1972, Structural profile of the northwestern Caribbean: Earth and Planetary Science Letters, v. 17, no. 1, p. 175-180, https://doi.org/10.1016/0012-821X(72)90273-7.","productDescription":"6 p.","startPage":"175","endPage":"180","costCenters":[],"links":[{"id":218930,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"17","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b9c00e4b08c986b31d206","contributors":{"authors":[{"text":"Dillon, William P. bdillon@usgs.gov","contributorId":79820,"corporation":false,"usgs":true,"family":"Dillon","given":"William","email":"bdillon@usgs.gov","middleInitial":"P.","affiliations":[{"id":678,"text":"Woods Hole Coastal and Marine Science Center","active":true,"usgs":true}],"preferred":false,"id":358024,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Vedder, J. G.","contributorId":97873,"corporation":false,"usgs":true,"family":"Vedder","given":"J.","middleInitial":"G.","affiliations":[],"preferred":false,"id":358026,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Graf, R.J.","contributorId":91234,"corporation":false,"usgs":true,"family":"Graf","given":"R.J.","email":"","affiliations":[],"preferred":false,"id":358025,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70009812,"text":"70009812 - 1972 - Imaging experiment: The Viking Lander","interactions":[],"lastModifiedDate":"2020-12-23T21:39:11.875147","indexId":"70009812","displayToPublicDate":"1972-01-01T00:00:00","publicationYear":"1972","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1963,"text":"Icarus","active":true,"publicationSubtype":{"id":10}},"title":"Imaging experiment: The Viking Lander","docAbstract":"The Viking Lander Imaging System will consist of two identical facsimile cameras. Each camera has a high-resolution mode with an instantaneous field of view of 0.04°, and survey and color modes with instantaneous fields of view of 0.12°. Cameras are positioned one meter apart to provide stereoscopic coverage of the near-field. The Imaging Experiment will provide important information about the morphology, composition, and origin of the Martian surface and atmospheric features. In addition, lander pictures will provide supporting information for other experiments in biology, organic chemistry, meteorology, and physical properties.