Samples of water and associated gases were collected from the Cajon Pass well using downhole samplers, and from the pipe stands at the completion of drill stem tests. The fluids were recovered from fracture systems in granitic rocks from two uncased test intervals located at 1,829 to 1,905 m and 1,829 to 2,115 m. Results of chemical analysis indicate major differences in the composition of water from different fracture systems. Water from one fracture system in the first test interval has a salinity of 2,150 mg/L dissolved solids and is relatively high in Cl, Ca and Fe, but low in HCO3 and SO4; water salinity from a second fracture system is only 950 mg/L and is dominated by Na, HCO3 and SO4. Most of the water from the second interval likely originated from one fracture system; it is alkaline, low in HCO3, has a salinity of 1,150 mg/L, and is a NaSO4 type water characteristic of pore water in the granitic rocks of the area. The differences in water composition indicate different evolutionary paths and isolation of water within relatively proximal fracture systems.
Visual surveys along subtidal belt transects were used to compare fish assemblages on an experimental and a control site before and after the removal of a canopy-forming kelp forest. The giant kelp Macrocystis pyrifera (L.) C.A. Agardh was removed at the holdfast from ≈ 1 ha of high relief structurally complex rock substratum. The abundance of seven species of fish, of which five were considered midwater species, significantly declined after the kelp was removed. No increases in abundance were noted within the experimental site. On the control site, two declines in abundance were observed, while two species increased in abundance. These results indicate that the presence of a giant kelp forest may increase the abundance and species diversity of the fish assemblages over a high relief rocky reef in central California, U.S.A.
","language":"English","publisher":"Elsevier","doi":"10.1016/0022-0981(88)90059-7","usgsCitation":"Bodkin, J.L., 1988, Effects of kelp forest removal on associated fish assemblages in central California: Journal of Experimental Marine Biology and Ecology, v. 117, no. 3, p. 227-238, https://doi.org/10.1016/0022-0981(88)90059-7.","productDescription":"12 p.","startPage":"227","endPage":"238","numberOfPages":"12","costCenters":[{"id":106,"text":"Alaska Biological Science Center","active":false,"usgs":true}],"links":[{"id":128516,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"117","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4b24e4b07f02db6ae916","contributors":{"authors":[{"text":"Bodkin, James L. 0000-0003-1641-4438 jbodkin@usgs.gov","orcid":"https://orcid.org/0000-0003-1641-4438","contributorId":748,"corporation":false,"usgs":true,"family":"Bodkin","given":"James","email":"jbodkin@usgs.gov","middleInitial":"L.","affiliations":[{"id":114,"text":"Alaska Science Center","active":true,"usgs":true},{"id":116,"text":"Alaska Science Center Biology MFEB","active":true,"usgs":true}],"preferred":true,"id":318435,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70013770,"text":"70013770 - 1988 - High-resolution 40Ar 39Ar chronology of Oligocene volcanic rocks, San Juan Mountains, Colorado","interactions":[],"lastModifiedDate":"2024-04-03T16:17:04.506734","indexId":"70013770","displayToPublicDate":"1988-01-01T00:00:00","publicationYear":"1988","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}},"displayTitle":"High-resolution 40Ar 39Ar chronology of Oligocene volcanic rocks, San Juan Mountains, Colorado","title":"High-resolution 40Ar 39Ar chronology of Oligocene volcanic rocks, San Juan Mountains, Colorado","docAbstract":"The central San Juan caldera complex consists of seven calderas from which eight major ash-flow tuffs were erupted during a period of intense volcanic activity that lasted for approximately 2 m.y. about 26–28 Ma. The analytical precision of conventional K-Ar dating in this time interval is not sufficient to unambiguously resolve this complex history. However,
The equilibrium fractionation of O isotopes between synthetic siderite and water has been measured at temperatures ranging from 33° to 197°C. The fractionation between siderite and water over this temperature range can be represented by the equation: 103 ln α = 3.13 × 106T−2 − 3.50. Comparison between the experimental and theoretical fractionations is favorable only at approximately 200°C; at lower temperatures, they generally differ by up to 2 permil.
Siderite was prepared by the slow addition of ferrous chloride solutions to sodium bicarbonate solutions at the experimental temperatures. It was also used to determine the O isotope fractionation factors between phosphoric acid liberated CO2 and siderite. The fractionation factors for this pair at 25° and 50°C are 1.01175 and 1.01075, respectively.
Preliminary results of the measured C isotope fractionation between siderite and Co2 also indicate C isotopic equilibrium during precipitation of siderite. The measured distribution of 13C between siderite and CO2 coincides with the theoretical values only at about 120°C. Experimental and theoretical C fractionations differ up to 3 permil at higher and lower temperatures.
At the IUGG Assembly at Vancouver during August 1987 new definitive geomagnetic reference field (DGRF) models to degree 10 for 1945, 1950, 1955, and 1960 were adopted by IAGA. Before these new DGRF models were accepted, the author developed a trend and trigonometric model (old trig model) based on the models IGRF 1945, IGRF 1950, IGRF 1955, IGRF 1960, DGRF 1965, DGRF 1970, DGRF 1975, DGRF 1980, and IGRF 1985, which were all approved by IAGA in Prague in August 1985. The old trig model consists of 720 trend and trigonometric coefficients for the calculation of spherical harmonic coefficients (SHC) only to degree eight because the early IGRF models were truncated there. These trend and Fourier sine coefficients can replace the equal number of SHC contained in the 9 DGRF-IGRF models.
","language":"English","publisher":"J-STAGE","doi":"10.5636/jgg.40.749","usgsCitation":"Alldredge, L., 1988, New trend- trigonometric model for interpolation and prediction of the geomagnetic field utilizing the new DGRF models: Journal of Geomagnetism & Geoelectricity, v. 40, no. 6, p. 749-759, https://doi.org/10.5636/jgg.40.749.","productDescription":"11 p.","startPage":"749","endPage":"759","numberOfPages":"11","costCenters":[],"links":[{"id":480023,"rank":2,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.5636/jgg.40.749","text":"Publisher Index Page"},{"id":226182,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"40","issue":"6","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a661ce4b0c8380cd72d18","contributors":{"authors":[{"text":"Alldredge, L.R.","contributorId":53457,"corporation":false,"usgs":true,"family":"Alldredge","given":"L.R.","email":"","affiliations":[],"preferred":false,"id":369356,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70013796,"text":"70013796 - 1988 - Statistical methods for investigating quiescence and other temporal seismicity patterns","interactions":[],"lastModifiedDate":"2012-03-12T17:18:30","indexId":"70013796","displayToPublicDate":"1988-01-01T00:00:00","publicationYear":"1988","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":"Statistical methods for investigating quiescence and other temporal seismicity patterns","docAbstract":"We propose a statistical model and a technique for objective recognition of one of the most commonly cited seismicity patterns:microearthquake quiescence. We use a Poisson process model for seismicity and define a process with quiescence as one with a particular type of piece-wise constant intensity function. From this model, we derive a statistic for testing stationarity against a 'quiescence' alternative. The large-sample null distribution of this statistic is approximated from simulated distributions of appropriate functionals applied to Brownian bridge processes. We point out the restrictiveness of the particular model we propose and of the quiescence idea in general. The fact that there are many point processes which have neither constant nor quiescent rate functions underscores the need to test for and describe nonuniformity thoroughly. We advocate the use of the quiescence test in conjunction with various other tests for nonuniformity and with graphical methods such as density estimation. ideally these methods may promote accurate description of temporal seismicity distributions and useful characterizations of interesting patterns. ?? 1988 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/BF00879003","issn":"00334553","usgsCitation":"Matthews, M., and Reasenberg, P., 1988, Statistical methods for investigating quiescence and other temporal seismicity patterns: Pure and Applied Geophysics PAGEOPH, v. 126, no. 2-4, p. 357-372, https://doi.org/10.1007/BF00879003.","startPage":"357","endPage":"372","numberOfPages":"16","costCenters":[],"links":[{"id":205035,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/BF00879003"},{"id":220450,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"126","issue":"2-4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b9731e4b08c986b31b934","contributors":{"authors":[{"text":"Matthews, M.V.","contributorId":70920,"corporation":false,"usgs":true,"family":"Matthews","given":"M.V.","email":"","affiliations":[],"preferred":false,"id":366887,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Reasenberg, P.A.","contributorId":19959,"corporation":false,"usgs":true,"family":"Reasenberg","given":"P.A.","email":"","affiliations":[],"preferred":false,"id":366886,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70014385,"text":"70014385 - 1988 - Isotopic evidence for organic matter oxidation by manganese reduction in the formation of stratiform manganese carbonate ore","interactions":[],"lastModifiedDate":"2024-04-03T16:25:52.510351","indexId":"70014385","displayToPublicDate":"1988-01-01T00:00:00","publicationYear":"1988","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":"Isotopic evidence for organic matter oxidation by manganese reduction in the formation of stratiform manganese carbonate ore","docAbstract":"Unlike other marine-sedimentary manganese ore deposits, which are largely composed of manganese oxides, the primary ore at Molango (Hidalgo State, Mexico) is exclusively manganese carbonate (rhodochrosite, Mn-calcite, kutnahorite). Stable isotope studies of the carbonates from Molango provide critical new information relevant to the controversy over syngenetic and diagenetic models of stratiform manganese deposit formation.
Negative δ13C values for carbonates from mineralized zones at Molango are strongly correlated with manganese content both on a whole rock scale and by mineral species. Whole rock δ13C data fall into three groups: high-grade ore = −16.4 to −11.5%.; manganese-rich, sub-ore-grade = −5.2 to 0%.; and unmineralized carbonates = 0 to +2.5%. (PDB). δ18O data show considerable overlap in values among the three groups: +4.8 to −2.8, −5.4 to −0.3%., and −7.4 to +6.2 (PDB), respectively. Isotopic data for individual co-existing minerals suggest a similar separation of δ13C values: δ13C values from calcite range from −1.1 to +0.7%. (PDB), whereas values from rhodochrosite are very negative, −12.9 to −5.5%., and values from kutnahorite or Mn-calcite are intermediate between calcite and rhodochrosite.
13C data are interpreted to indicate that calcite (i.e. unmineralized carbonate) formed from a normal marine carbon reservoir. However, 13C data for the manganese-bearing carbonates suggest a mixed seawater and organic source of carbon. The presence of only trace amounts of pyrite suggests sulfate reduction may have played a minor part in oxidizing organic matter. It is possible that manganese reduction was the predominant reaction that oxidized organic matter and that it released organic-derived CO2 to produce negative δ13C values and manganese carbonate mineralization.
","language":"English","publisher":"Elsevier","doi":"10.1016/0016-7037(88)90036-1","issn":"00167037","usgsCitation":"Okita, P., Maynard, J., Spiker, E., and Force, E.R., 1988, Isotopic evidence for organic matter oxidation by manganese reduction in the formation of stratiform manganese carbonate ore: Geochimica et Cosmochimica Acta, v. 52, no. 11, p. 2679-2685, https://doi.org/10.1016/0016-7037(88)90036-1.","productDescription":"7 p.","startPage":"2679","endPage":"2685","numberOfPages":"7","costCenters":[],"links":[{"id":225573,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"52","issue":"11","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a3face4b0c8380cd64709","contributors":{"authors":[{"text":"Okita, P.M.","contributorId":63031,"corporation":false,"usgs":true,"family":"Okita","given":"P.M.","email":"","affiliations":[],"preferred":false,"id":368278,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Maynard, J.B.","contributorId":9007,"corporation":false,"usgs":true,"family":"Maynard","given":"J.B.","email":"","affiliations":[],"preferred":false,"id":368276,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Spiker, E.C.","contributorId":103275,"corporation":false,"usgs":true,"family":"Spiker","given":"E.C.","affiliations":[],"preferred":false,"id":368279,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Force, E. R.","contributorId":28235,"corporation":false,"usgs":true,"family":"Force","given":"E.","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":368277,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70014369,"text":"70014369 - 1988 - The metal oxide fraction of pelagic sediment in the equatorial North Pacific Ocean: A source of metals in ferromanganese nodules","interactions":[],"lastModifiedDate":"2024-04-03T16:18:41.285508","indexId":"70014369","displayToPublicDate":"1988-01-01T00:00:00","publicationYear":"1988","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":"The metal oxide fraction of pelagic sediment in the equatorial North Pacific Ocean: A source of metals in ferromanganese nodules","docAbstract":"Pelagic sediment recovered at DOMES Site A in the equatorial North Pacific (151°W, 9° 15′N) consists of a surface homogeneous layer, approximately 10 cm thick, overlying a strongly mottled layer that is lighter in color. The radiolarian composition of both units is Quaternary. In areas where this sediment was only a few centimeters thick, the underlying sediment was early Tertiary. Clay mineralogy and major oxide composition of the two Quaternary sediments are uniform. Their similarity to continental shale suggests that the sediment has a terrigenous source. Clay mineralogy and major oxide composition of the Tertiary sediment also are uniform, although they differ markedly from the Quarternary sediment.
In contrast to the major oxides, concentrations of Mn, Co, Cu, and Ni soluble in hydroxylamine hydrochlorideacetic acid are strongly different in the surface and subsurface Quaternary sediment. Mn and Ni exhibit pronounced depletions in the subsurface sediment, Ni slightly more than Mn. Cu is also depleted in the subsurface sediment, but less than Mn. It is also depleted in the subsurface Tertiary sediment, whereas the Mn concentration remains high. Concentration of Co relative to Mn increases into the subsurface Quaternary sediment to a constant Co:Mn ratio of 3 × 10−2. The trivalent REE (the REE exclusive of Ce) and Fe exhibit little down-core variation.
Distribution of elements in these sediments is closely related to their concentration in associated surface ferromanganese nodules. The nodules are of two distinct types: those from the area where the Quaternary sediment is relatively thick have δ-MnO2 as the dominant manganese mineral. The ratios of Ni:Mn, Cu:Mn, and Fe:Mn in these nodules approximate the corresponding ratios of the soluble fraction of surface sediment. Todorokite is the dominant mineral of nodules recovered from areas where the Quaternary sediment is thin. Relatively high Cu/Mn, Ni/Mn, and low Fe/Mn ratios of these nodules mirror differences between the soluble fraction of surface and subsurface Quaternary sediment. These compositional trends of sediment and nodules at DOMES Site A reflect a diagenetic origin for the todorokite nodules and a predominantly hydrogenous origin for the δ-MnO2 nodules.
","language":"English","publisher":"Elsevier","doi":"10.1016/0016-7037(88)90193-7","issn":"00167037","usgsCitation":"Piper, D., 1988, The metal oxide fraction of pelagic sediment in the equatorial North Pacific Ocean: A source of metals in ferromanganese nodules: Geochimica et Cosmochimica Acta, v. 52, no. 8, p. 2127-2145, https://doi.org/10.1016/0016-7037(88)90193-7.","productDescription":"19 p.","startPage":"2127","endPage":"2145","numberOfPages":"19","costCenters":[],"links":[{"id":225310,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"52","issue":"8","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505badcbe4b08c986b323df4","contributors":{"authors":[{"text":"Piper, D.Z.","contributorId":34154,"corporation":false,"usgs":false,"family":"Piper","given":"D.Z.","email":"","affiliations":[],"preferred":false,"id":368233,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70162686,"text":"70162686 - 1988 - What is worse than the “big one”?","interactions":[],"lastModifiedDate":"2016-02-16T16:49:14","indexId":"70162686","displayToPublicDate":"1988-01-01T00:00:00","publicationYear":"1988","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1437,"text":"Earthquakes & Volcanoes (USGS)","active":true,"publicationSubtype":{"id":10}},"title":"What is worse than the “big one”?","docAbstract":"The Whittier Narrows California earthquake sequence (local magnitude, Ml=5.9 or 1 October, 1987), which caused over $358 million damage, indicates that assessments of earthquake hazards in Los Angeles metropolitan area may be underestimated. the sequence ruptured a previously unidentified thrust fault that may be part of a large system of thrust faults that extends across the entire east-west length of the northern margin of the Los Angeles basin. Peak horizontal accelerations from the main shock, which were measured at ground level and in structures, were as high as 0.6g (where g is acceleration of gravity at sea level) within 50 kilometers of the epicenter
\nThe first thought in the minds of many residents of the city of Whittier when the first shock hit them was \"Is this the big one?\" the San Andreas' once-in-150-years great shaker? It might as well have been for Whittier, which is 20 kilometers east of downtown Los Angeles. The ground shook harder there this month than it will when the big one does strike the distant San Andreas, which lies 50 kilometers on the other side of the mountains. And this was only a moderate, magnitude 6.1 shock. Earthquake of magnitude 7 and large 30 times more powerful, could rupture faults beneath the feet of Angelenos at any time. The loss of life and destruction could exceed that caused by the big one.
","language":"English","publisher":"U.S Geological Survey","usgsCitation":"Kerr, R.A., 1988, What is worse than the “big one”?: Earthquakes & Volcanoes (USGS), v. 20, no. 6, p. 213-218.","productDescription":"6 p.","startPage":"213","endPage":"218","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":315012,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"California","otherGeospatial":"Whittier","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -118.02268981933594,\n 34.0079888707242\n ],\n [\n -118.06165695190428,\n 34.003292829485694\n ],\n [\n -118.06491851806639,\n 33.999877363673036\n ],\n [\n -118.04157257080078,\n 33.96770832591751\n ],\n [\n -118.00809860229492,\n 33.94919849708684\n ],\n [\n -117.99488067626953,\n 33.95916582840359\n ],\n [\n -117.98337936401366,\n 33.97397227882432\n ],\n [\n -118.00827026367186,\n 34.00556973039383\n ],\n [\n -118.01633834838866,\n 34.014676723581545\n ],\n [\n -118.02337646484375,\n 34.014676723581545\n ],\n [\n -118.02200317382812,\n 34.009269564176414\n ],\n [\n -118.02268981933594,\n 34.0079888707242\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"20","issue":"6","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"56ab49dbe4b07ca61bfea622","contributors":{"authors":[{"text":"Kerr, R. A.","contributorId":152674,"corporation":false,"usgs":false,"family":"Kerr","given":"R.","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":590133,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70162358,"text":"70162358 - 1988 - List of major natural disasters, 1960-1987","interactions":[],"lastModifiedDate":"2016-02-04T15:15:47","indexId":"70162358","displayToPublicDate":"1988-01-01T00:00:00","publicationYear":"1988","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1437,"text":"Earthquakes & Volcanoes (USGS)","active":true,"publicationSubtype":{"id":10}},"title":"List of major natural disasters, 1960-1987","language":"English","publisher":"U.S Geological Survey","usgsCitation":"Berz, G., 1988, List of major natural disasters, 1960-1987: Earthquakes & Volcanoes (USGS), v. 20, no. 6, p. 226-228.","productDescription":"3 p.","startPage":"226","endPage":"228","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":314638,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"20","issue":"6","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"56a20f4ae4b0961cf2811bf7","contributors":{"authors":[{"text":"Berz, G.","contributorId":152426,"corporation":false,"usgs":false,"family":"Berz","given":"G.","email":"","affiliations":[],"preferred":false,"id":589295,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70197161,"text":"70197161 - 1988 - Paleomagnetic results from the Shasta Bally Plutonic Belt in the Klamath Mountains Province, northern California","interactions":[],"lastModifiedDate":"2018-05-18T13:56:28","indexId":"70197161","displayToPublicDate":"1988-01-01T00:00:00","publicationYear":"1988","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1807,"text":"Geophysical Research Letters","active":true,"publicationSubtype":{"id":10}},"title":"Paleomagnetic results from the Shasta Bally Plutonic Belt in the Klamath Mountains Province, northern California","docAbstract":"Available paleomagnetic data show approximately 100° of clockwise rotation for Permian and Triassic strata of the Eastern Klamath terrane. Jurassic strata of this terrane are rotated approximately 60° clockwise, which is comparable to rotations reported for Jurassic plutons that occur elsewhere in the Klamath Mountains province. Paleomagnetic data obtained during the present study from the Shasta Bally belt of Cretaceous plutons indicate 25.7° ± 13.6° of clockwise rotation for the province since Early Cretaceous time (≃ 136 Ma). The waning stages of rotation at the time of emplacement of the Shasta Bally belt plutons, which was closely followed by deposition of basal strata (Lower Cretaceous) of the Great Valley sequence, probably represents completion of accretion of the province to cratonic North America.
","language":"English","publisher":"AGU","doi":"10.1029/GL015i001p00056","usgsCitation":"Mankinen, E.A., Irwin, W., and Gromme, C.S., 1988, Paleomagnetic results from the Shasta Bally Plutonic Belt in the Klamath Mountains Province, northern California: Geophysical Research Letters, v. 15, no. 1, p. 56-59, https://doi.org/10.1029/GL015i001p00056.","productDescription":"4 p.","startPage":"56","endPage":"59","costCenters":[{"id":312,"text":"Geology, Minerals, Energy, and Geophysics Science Center","active":true,"usgs":true}],"links":[{"id":354328,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"California","otherGeospatial":"Klamath Mountains Province","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -123.25,\n 40\n ],\n [\n -121.75,\n 40\n ],\n [\n -121.75,\n 42\n ],\n [\n -123.25,\n 42\n ],\n [\n -123.25,\n 40\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"15","issue":"1","noUsgsAuthors":false,"publicationDate":"2012-12-07","publicationStatus":"PW","scienceBaseUri":"5aff338fe4b0da30c1bfd91b","contributors":{"authors":[{"text":"Mankinen, Edward A. 0000-0001-7496-2681 emank@usgs.gov","orcid":"https://orcid.org/0000-0001-7496-2681","contributorId":1054,"corporation":false,"usgs":true,"family":"Mankinen","given":"Edward","email":"emank@usgs.gov","middleInitial":"A.","affiliations":[{"id":312,"text":"Geology, Minerals, Energy, and Geophysics Science Center","active":true,"usgs":true}],"preferred":true,"id":735865,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Irwin, William P.","contributorId":12889,"corporation":false,"usgs":true,"family":"Irwin","given":"William P.","affiliations":[],"preferred":false,"id":735866,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Gromme, C. Sherman","contributorId":22236,"corporation":false,"usgs":true,"family":"Gromme","given":"C.","email":"","middleInitial":"Sherman","affiliations":[],"preferred":false,"id":735867,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70168670,"text":"70168670 - 1988 - Earthquake warning system for Japan Railways’ bullet train; implications for disaster prevention in California","interactions":[],"lastModifiedDate":"2019-11-14T09:10:28","indexId":"70168670","displayToPublicDate":"1988-01-01T00:00:00","publicationYear":"1988","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1437,"text":"Earthquakes & Volcanoes (USGS)","active":true,"publicationSubtype":{"id":10}},"title":"Earthquake warning system for Japan Railways’ bullet train; implications for disaster prevention in California","docAbstract":"In Japan, the level of public awareness of the dangers of earthquakes is high. The 1923 Kanto earthquake killed about 120,000 people out of a total Japanese population of about 50 million; an equivalent disaster in the U.S would involve 600,000 deaths.
\nToday, Japanese society is well aware of the prediction of the Tokai earthquake. It is estimated by the Tokyo earthquake. It is estimated by the Tokyo muncipal government that this predicted earthquake could kill 30,000 people. (this estimate is viewed by many as conservative; other Japanese government agencies have made estimates but they have not been published.) Reduction in the number deaths from 120,000 to 30,000 between the Kanto earthquake and the predicted Tokai earthquake is due in large part to the reduction in the proportion of wooden construction (houses).
","language":"English","publisher":"U.S Geological Survey","publisherLocation":"Reston, VA","usgsCitation":"Nakamura, Y., and Tucker, B.E., 1988, Earthquake warning system for Japan Railways’ bullet train; implications for disaster prevention in California: Earthquakes & Volcanoes (USGS), v. 20, no. 4, p. 140-155.","productDescription":"16 p.","startPage":"140","endPage":"155","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":318345,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"Japan","geographicExtents":"{\"type\":\"FeatureCollection\",\"features\":[{\"type\":\"Feature\",\"id\":\"17\",\"properties\":{\"name\":\"Japan\"},\"geometry\":{\"type\":\"MultiPolygon\",\"coordinates\":[[[[134.63843,34.14923],[134.76638,33.80633],[134.20342,33.20118],[133.79295,33.52199],[133.28027,33.28957],[133.01486,32.70457],[132.36311,32.98938],[132.37118,33.46364],[132.92437,34.0603],[133.49297,33.94462],[133.90411,34.36493],[134.63843,34.14923],[134.63843,34.14923]]],[[[140.97639,37.14207],[140.59977,36.34398],[140.77407,35.84288],[140.25328,35.13811],[138.97553,34.6676],[137.2176,34.60629],[135.79298,33.46481],[135.12098,33.84907],[135.07943,34.59654],[133.34032,34.37594],[132.15677,33.90493],[130.98614,33.88576],[132.00004,33.14999],[131.33279,31.45035],[130.68632,31.02958],[130.20242,31.41824],[130.44768,32.31947],[129.81469,32.61031],[129.40846,33.29606],[130.35394,33.60415],[130.87845,34.23274],[131.88423,34.74971],[132.61767,35.43339],[134.6083,35.73162],[135.67754,35.52713],[136.72383,37.30498],[137.39061,36.82739],[138.8576,37.82748],[139.4264,38.21596],[140.05479,39.43881],[139.88338,40.56331],[140.30578,41.19501],[141.36897,41.37856],[141.91426,39.99162],[141.8846,39.18086],[140.95949,38.174],[140.97639,37.14207],[140.97639,37.14207]]],[[[143.91016,44.1741],[144.61343,43.96088],[145.32083,44.38473],[145.54314,43.26209],[144.05966,42.98836],[143.18385,41.99521],[141.61149,42.67879],[141.06729,41.58459],[139.95511,41.56956],[139.81754,42.56376],[140.31209,43.33327],[141.38055,43.38882],[141.67195,44.77213],[141.96764,45.55148],[143.14287,44.51036],[143.91016,44.1741],[143.91016,44.1741]]]]}}]}","volume":"20","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"56cd90d3e4b0b1892d9e82bd","contributors":{"authors":[{"text":"Nakamura, Y.","contributorId":70117,"corporation":false,"usgs":true,"family":"Nakamura","given":"Y.","email":"","affiliations":[],"preferred":false,"id":621230,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Tucker, B. E.","contributorId":167150,"corporation":false,"usgs":false,"family":"Tucker","given":"B.","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":621231,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70168823,"text":"70168823 - 1988 - Salton Sea Scientific Drilling Program","interactions":[],"lastModifiedDate":"2016-03-03T16:43:57","indexId":"70168823","displayToPublicDate":"1988-01-01T00:00:00","publicationYear":"1988","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1437,"text":"Earthquakes & Volcanoes (USGS)","active":true,"publicationSubtype":{"id":10}},"title":"Salton Sea Scientific Drilling Program","docAbstract":"The Salton Sea Scientific Drilling Program (SSSDP) was the first large-scale drilling project undertaken by the U.S Continental Scientific Drilling Program. The objectives of the SSSDP were (1) to drill a deep well into the Salton Sea Geothermal Field in the Imperial Valley of California, (2) to retrieve a high percentage of core and cuttings along the entire depth of the well, (3) to obtain a comprehensive suite of geophysical logs, (4) to conduct flow tests at two depths (and to take fluid samples therefrom), and (5) to carry out several downhole experiments. These activites enabled the U.S Geological Survey and cooperating agencies to study the physical and chemical processes involved in an active hydrothermal system driven by a molten-rock heat source. This program, orginally conceived by Wilfred A. Elders, professor of geology at the University of California at Riverside, was coordinated under an inter-agency accord among the Geological Survey, the U.S Department of Energy, and the National Science Foundation.
","language":"English","publisher":"U.S Geological Survey","usgsCitation":"Sass, J., 1988, Salton Sea Scientific Drilling Program: Earthquakes & Volcanoes (USGS), v. 20, no. 4, p. 156-160.","productDescription":"5 p.","startPage":"156","endPage":"160","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":318549,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"California","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -115.58990478515625,\n 33.27543541298162\n ],\n [\n -115.70251464843749,\n 33.09614359735857\n ],\n [\n -115.56243896484374,\n 33.05471648804276\n ],\n [\n -115.46905517578124,\n 33.23179557851464\n ],\n [\n -115.58990478515625,\n 33.27543541298162\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"20","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"56d96e5ee4b015c306f764c8","contributors":{"authors":[{"text":"Sass, J.H.","contributorId":70749,"corporation":false,"usgs":true,"family":"Sass","given":"J.H.","email":"","affiliations":[{"id":595,"text":"U.S. Geological Survey","active":false,"usgs":true}],"preferred":false,"id":621854,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70168771,"text":"70168771 - 1988 - Earthquakes, January-February 1988","interactions":[],"lastModifiedDate":"2016-03-01T16:01:55","indexId":"70168771","displayToPublicDate":"1988-01-01T00:00:00","publicationYear":"1988","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1437,"text":"Earthquakes & Volcanoes (USGS)","active":true,"publicationSubtype":{"id":10}},"title":"Earthquakes, January-February 1988","docAbstract":"There was one major earthquake (7.0-7.9) during this reporting period, located in the Philippine Islands on February 24. The first earthquake-related deaths fro the year were reported in South Africa, Bangladesh, and California.
\nIn the United States, Southern California experienced a moderate earthquake on February 11.
","language":"English","publisher":"U.S Geological Survey","usgsCitation":"Person, W., 1988, Earthquakes, January-February 1988: Earthquakes & Volcanoes (USGS), v. 20, no. 3, p. 124-128.","productDescription":"5 p.","startPage":"124","endPage":"128","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":318478,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"20","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"56d6cb3fe4b015c306f32c6f","contributors":{"authors":[{"text":"Person, W. J.","contributorId":91472,"corporation":false,"usgs":true,"family":"Person","given":"W. J.","affiliations":[],"preferred":false,"id":621673,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70168772,"text":"70168772 - 1988 - Earthquakes, March-April 1988","interactions":[],"lastModifiedDate":"2016-03-01T16:05:50","indexId":"70168772","displayToPublicDate":"1988-01-01T00:00:00","publicationYear":"1988","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1437,"text":"Earthquakes & Volcanoes (USGS)","active":true,"publicationSubtype":{"id":10}},"title":"Earthquakes, March-April 1988","docAbstract":"There were two major earthquakes (7.0-7.9) during this reporting period. the first, a magnitude 7.6, was centered in the Gulf of Alaska on March 6 and the second, a magnitude 7.0, occurred near the coast of southern Peru on April 12.
\nIn the United States, the largest earthquake was the magnitude 7.6 in the Gulf of Alaska on Merch 6. A series of moderate and light earthquakes occurred in Hawaii.
","language":"English","publisher":"U.S Geological Survey","usgsCitation":"Person, W., 1988, Earthquakes, March-April 1988: Earthquakes & Volcanoes (USGS), v. 20, no. 4, p. 167-171.","productDescription":"5 p.","startPage":"167","endPage":"171","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":318479,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"20","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"56d6cb51e4b015c306f32cb0","contributors":{"authors":[{"text":"Person, W. J.","contributorId":91472,"corporation":false,"usgs":true,"family":"Person","given":"W. J.","affiliations":[],"preferred":false,"id":621674,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70168773,"text":"70168773 - 1988 - Earthquakes, May-June 1988","interactions":[],"lastModifiedDate":"2016-03-01T16:08:51","indexId":"70168773","displayToPublicDate":"1988-01-01T00:00:00","publicationYear":"1988","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1437,"text":"Earthquakes & Volcanoes (USGS)","active":true,"publicationSubtype":{"id":10}},"title":"Earthquakes, May-June 1988","docAbstract":"There were no major earthquakes during the months of May and June. Only one earthquake-related death was reported; this occurred on June 20 in the Philippine Islands.
\nIn the United States, three moderate earthquakes were expereinced in California but none crashed deaths or injuries.
","language":"English","publisher":"U.S Geological Survey","usgsCitation":"Person, W., 1988, Earthquakes, May-June 1988: Earthquakes & Volcanoes (USGS), v. 20, no. 5, p. 196-198.","productDescription":"3 p.","startPage":"196","endPage":"198","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":318480,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"20","issue":"5","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"56d6cb54e4b015c306f32cc1","contributors":{"authors":[{"text":"Person, W. J.","contributorId":91472,"corporation":false,"usgs":true,"family":"Person","given":"W. J.","affiliations":[],"preferred":false,"id":621675,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70162659,"text":"70162659 - 1988 - The role of the Federal government in the Parkfield earthquake prediction experiment","interactions":[],"lastModifiedDate":"2016-02-09T16:54:42","indexId":"70162659","displayToPublicDate":"1988-01-01T00:00:00","publicationYear":"1988","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1437,"text":"Earthquakes & Volcanoes (USGS)","active":true,"publicationSubtype":{"id":10}},"title":"The role of the Federal government in the Parkfield earthquake prediction experiment","docAbstract":"Earthquake prediction research in the United States us carried out under the aegis of the National Earthquake Hazards Reduction Act of 1977. One of the objectives of the act is \"the implementation in all areas of high or moderate seismic risk, of a system (including personnel and procedures) for predicting damaging earthquakes and for identifying, evaluating, and accurately characterizing seismic hazards.\" Among the four Federal agencies working under the 1977 act, the U.S Geological Survey (USGS) is responsible for earthquake prediction research and technological implementation. The USGS has adopted a goal that is stated quite simply; predict the time, place, and magnitude of damaging earthquakes. The Parkfield earthquake prediction experiment represents the msot concentrated and visible effor to date to test progress toward this goal.
","language":"English","publisher":"U.S Geological Survey","usgsCitation":"Filson, J., 1988, The role of the Federal government in the Parkfield earthquake prediction experiment: Earthquakes & Volcanoes (USGS), v. 20, no. 2, p. 56-59.","productDescription":"4 p.","startPage":"56","endPage":"59","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":314984,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Calfornia","otherGeospatial":"San Andreas fault","volume":"20","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"56ab49d7e4b07ca61bfea610","contributors":{"authors":[{"text":"Filson, J.R.","contributorId":52619,"corporation":false,"usgs":true,"family":"Filson","given":"J.R.","affiliations":[],"preferred":false,"id":590089,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70162673,"text":"70162673 - 1988 - Assessing the earthquake hazards in urban areas","interactions":[],"lastModifiedDate":"2016-02-11T16:54:31","indexId":"70162673","displayToPublicDate":"1988-01-01T00:00:00","publicationYear":"1988","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1437,"text":"Earthquakes & Volcanoes (USGS)","active":true,"publicationSubtype":{"id":10}},"title":"Assessing the earthquake hazards in urban areas","docAbstract":"Major urban areas in widely scattered geographic locations across the United States are a t varying degrees of risk from earthquakes. the locations of these urban areas include Charleston, South Carolina; Memphis Tennessee; St.Louis, Missouri; Salt Lake City, Utah; Seattle-Tacoma, Washington; Portland, Oregon; and Anchorage, Alaska; even Boston, Massachusetts, and Buffalo New York, have a history of large earthquakes. Cooperative research during the past decade has focused on assessing the nature and degree of the risk or seismic hazard i nthe broad geographic regions around each urban area. The strategy since the 1970's has been to bring together local, State, and Federal resources to solve the problem of assessing seismic risk. Successfl sooperative programs have been launched in the San Francisco Bay and Los Angeles regions in California and the Wasatch Front region in Utah.
","language":"English","publisher":"U.S Geological Survey","usgsCitation":"Hays, W.W., Gori, P.L., and Kockelman, W., 1988, Assessing the earthquake hazards in urban areas: Earthquakes & Volcanoes (USGS), v. 20, no. 6, p. 208-212.","productDescription":"5 p.","startPage":"208","endPage":"212","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":314999,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"20","issue":"6","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"56ab49bfe4b07ca61bfea4ed","contributors":{"authors":[{"text":"Hays, W. W.","contributorId":66693,"corporation":false,"usgs":true,"family":"Hays","given":"W.","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":590108,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Gori, P. L.","contributorId":87138,"corporation":false,"usgs":true,"family":"Gori","given":"P.","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":590109,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Kockelman, W. J.","contributorId":55427,"corporation":false,"usgs":true,"family":"Kockelman","given":"W. J.","affiliations":[],"preferred":false,"id":590110,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70169015,"text":"70169015 - 1988 - Historical vignettes of the 1881, 1901, 1922, 1934, and 1966 Parkfield earthquakes","interactions":[],"lastModifiedDate":"2016-03-10T14:15:23","indexId":"70169015","displayToPublicDate":"1988-01-01T00:00:00","publicationYear":"1988","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1437,"text":"Earthquakes & Volcanoes (USGS)","active":true,"publicationSubtype":{"id":10}},"title":"Historical vignettes of the 1881, 1901, 1922, 1934, and 1966 Parkfield earthquakes","language":"English","publisher":"U.S Geological Survey","usgsCitation":"Thomason, D., 1988, Historical vignettes of the 1881, 1901, 1922, 1934, and 1966 Parkfield earthquakes: Earthquakes & Volcanoes (USGS), v. 20, no. 2, p. 52-55.","productDescription":"4 p.","startPage":"52","endPage":"55","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":318799,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"California","otherGeospatial":"Parkfield","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -120.53237915039062,\n 36.01356058518153\n ],\n [\n -120.29067993164064,\n 35.76322914549896\n ],\n [\n -120.40054321289064,\n 35.69187929931617\n ],\n [\n -120.66696166992188,\n 35.97356075349624\n ],\n [\n -120.53237915039062,\n 36.01356058518153\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"20","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"56e2a8c6e4b0f59b85d39193","contributors":{"authors":[{"text":"Thomason, D.","contributorId":167512,"corporation":false,"usgs":false,"family":"Thomason","given":"D.","email":"","affiliations":[],"preferred":false,"id":622547,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70168672,"text":"70168672 - 1988 - The fir trees have moved","interactions":[],"lastModifiedDate":"2019-11-14T09:18:56","indexId":"70168672","displayToPublicDate":"1988-01-01T00:00:00","publicationYear":"1988","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1437,"text":"Earthquakes & Volcanoes (USGS)","active":true,"publicationSubtype":{"id":10}},"title":"The fir trees have moved","docAbstract":"Trees show a record of the great Kanto earthquake of 1923 in Japan.
\nTwo minutes before noon on the morning of September 1, 1923, the Great Kanto earthquake occurred with a magnitude of 7.9 in the northern part of Mizukuma in Sagmi Prefecture, Japan. Fires broke out immediately following the earthquake, causing great damage in Tokyo and in Kanagawa. Deaths totaled 99,331 persons, with 43,476 missing; 128,266 houses partially destroyed, and 447,128 houses were destroyed by fire. Large earth movements occurred and there were innumerable landslides. Along the Kanto coastline, waves came crashing into the harbors; at Misaki the height of the waves was six meters, and 8.1 meters at Sunozaki. At Tokyo the amplitude of the vibrations renged from 14 to 20 centimeters and at Odawara they were estimated to have reached 80 centimeters.
","language":"English","publisher":"U.S Geological Survey","publisherLocation":"Reston, VA","usgsCitation":"Oki, Y., and Otaka, S., 1988, The fir trees have moved: Earthquakes & Volcanoes (USGS), v. 20, no. 6, p. 224-225.","productDescription":"2 p.","startPage":"224","endPage":"225","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":318347,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"Japan","geographicExtents":"{\"type\":\"FeatureCollection\",\"features\":[{\"type\":\"Feature\",\"id\":\"17\",\"properties\":{\"name\":\"Japan\"},\"geometry\":{\"type\":\"MultiPolygon\",\"coordinates\":[[[[134.63843,34.14923],[134.76638,33.80633],[134.20342,33.20118],[133.79295,33.52199],[133.28027,33.28957],[133.01486,32.70457],[132.36311,32.98938],[132.37118,33.46364],[132.92437,34.0603],[133.49297,33.94462],[133.90411,34.36493],[134.63843,34.14923],[134.63843,34.14923]]],[[[140.97639,37.14207],[140.59977,36.34398],[140.77407,35.84288],[140.25328,35.13811],[138.97553,34.6676],[137.2176,34.60629],[135.79298,33.46481],[135.12098,33.84907],[135.07943,34.59654],[133.34032,34.37594],[132.15677,33.90493],[130.98614,33.88576],[132.00004,33.14999],[131.33279,31.45035],[130.68632,31.02958],[130.20242,31.41824],[130.44768,32.31947],[129.81469,32.61031],[129.40846,33.29606],[130.35394,33.60415],[130.87845,34.23274],[131.88423,34.74971],[132.61767,35.43339],[134.6083,35.73162],[135.67754,35.52713],[136.72383,37.30498],[137.39061,36.82739],[138.8576,37.82748],[139.4264,38.21596],[140.05479,39.43881],[139.88338,40.56331],[140.30578,41.19501],[141.36897,41.37856],[141.91426,39.99162],[141.8846,39.18086],[140.95949,38.174],[140.97639,37.14207],[140.97639,37.14207]]],[[[143.91016,44.1741],[144.61343,43.96088],[145.32083,44.38473],[145.54314,43.26209],[144.05966,42.98836],[143.18385,41.99521],[141.61149,42.67879],[141.06729,41.58459],[139.95511,41.56956],[139.81754,42.56376],[140.31209,43.33327],[141.38055,43.38882],[141.67195,44.77213],[141.96764,45.55148],[143.14287,44.51036],[143.91016,44.1741],[143.91016,44.1741]]]]}}]}","volume":"20","issue":"6","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"56cd90ece4b0b1892d9e832a","contributors":{"authors":[{"text":"Oki, Y.","contributorId":167151,"corporation":false,"usgs":false,"family":"Oki","given":"Y.","email":"","affiliations":[],"preferred":false,"id":621232,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Otaka, S.","contributorId":167152,"corporation":false,"usgs":false,"family":"Otaka","given":"S.","email":"","affiliations":[],"preferred":false,"id":621233,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70185534,"text":"70185534 - 1988 - Hydraulic conductivity of a sandy soil at low water content after compaction by various methods","interactions":[],"lastModifiedDate":"2020-01-12T14:26:43","indexId":"70185534","displayToPublicDate":"1988-01-01T00:00:00","publicationYear":"1988","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3420,"text":"Soil Science Society of America Journal","active":true,"publicationSubtype":{"id":10}},"title":"Hydraulic conductivity of a sandy soil at low water content after compaction by various methods","docAbstract":"To investigate the degree to which compaction of a sandy soil influences its unsaturated hydraulic conductivity K, samples of Oakley sand (now in the Delhi series; mixed, thermic, Typic Xeropsamments) were packed to various densities and K was measured by the steady-state centrifuge method. The air-dry, machine packing was followed by centrifugal compression with the soil wet to about one-third saturation. Variations in (i) the impact frequency and (ii) the impact force during packing, and (iii) the amount of centrifugal force applied after packing, produced a range of porosity from 0.333 to 0.380. With volumetric water content θ between 0.06 and 0.12, K values were between 7 × 10−11 and 2 × 10−8 m/s. Comparisons of K at a single θ value for samples differing in porosity by about 3% showed as much as fivefold variation for samples prepared by different packing procedures, while there generally was negligible variation (within experimental error of 8%) where the porosity difference resulted from a difference in centrifugal force. Analysis involving capillary-theory models suggests that the differences in K can be related to differences in pore-space geometry inferred from water retention curves measured for the various samples.
","language":"English","publisher":"Soil Science Society of America","doi":"10.2136/sssaj1988.03615995005200020001x","usgsCitation":"Nimmo, J.R., and Akstin, K.C., 1988, Hydraulic conductivity of a sandy soil at low water content after compaction by various methods: Soil Science Society of America Journal, v. 52, no. 2, p. 303-310, https://doi.org/10.2136/sssaj1988.03615995005200020001x.","productDescription":"8 p.","startPage":"303","endPage":"310","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":338179,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"52","issue":"2","noUsgsAuthors":false,"publicationDate":"1988-03-01","publicationStatus":"PW","scienceBaseUri":"58d4df0ae4b05ec79911d1d6","contributors":{"authors":[{"text":"Nimmo, John R. 0000-0001-8191-1727 jrnimmo@usgs.gov","orcid":"https://orcid.org/0000-0001-8191-1727","contributorId":757,"corporation":false,"usgs":true,"family":"Nimmo","given":"John","email":"jrnimmo@usgs.gov","middleInitial":"R.","affiliations":[{"id":37277,"text":"WMA - Earth System Processes Division","active":true,"usgs":true},{"id":438,"text":"National Research Program - Western Branch","active":true,"usgs":true}],"preferred":true,"id":685895,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Akstin, Katherine C.","contributorId":88023,"corporation":false,"usgs":true,"family":"Akstin","given":"Katherine","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":685896,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70014160,"text":"70014160 - 1988 - Hydrodynamics of Denver basin: Explanation of subnormal fluid pressures","interactions":[],"lastModifiedDate":"2023-01-17T15:50:27.948092","indexId":"70014160","displayToPublicDate":"1988-01-01T00:00:00","publicationYear":"1988","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":701,"text":"American Association of Petroleum Geologists Bulletin","active":true,"publicationSubtype":{"id":10}},"title":"Hydrodynamics of Denver basin: Explanation of subnormal fluid pressures","docAbstract":"Anomalously low fluid potential (and hence subnormal fluid pressure) is found in Mesozoic and Paleozoic rocks of the Denver basin. The potentiometric surface for the Dakota and basal Cretaceous sandstones is 2,000-3,000 ft (600-900 m) beneath the land surface in parts of the Denver basin in Colorado and Nebraska. The potentiometric surface for pre-Pennsylvanian carbonate rocks is 1,500 ft (450 m) lower than the potentiometric surface for the Dakota Sandstone in southeastern Colorado and western Kansas. The low fluid potential seems especially anomalous considering the high elevation of the outcrops along the Laramie and Front Ranges and the Black Hills.
A quasi-three-dimensional numerical flow model is used to investigate the regional flow system in the Denver basin and adjacent Mid-Continent. The model simulates flow through the entire Phanerozoic sedimentary column and indicates that subnormal pressures are a consequence of hydraulic insulation of the strata within the basin from their recharge zones as compared to their discharge zones. The Dakota Sandstone and underlying hydrostratigraphic units are insulated from the overlying water table by low-permeability shales of Cretaceous age, and from their own high-elevation outcrops by a zone of low permeability coincident with the basin deep. Subnormal pressures in the area of Denver, Colorado, and southward are further enhanced by faulting along the Front Range that isolates the stra a within the basin from their outcrops. The results of this study show that (1) subnormal fluid pressures can be explained as a consequence of steady-state regional ground-water flow, (2) shale is an important factor in the regional flow system, and (3) depth is an important control on the distribution of hydraulic conductivity.
","language":"English","publisher":"American Association of Petroleum Geologists","doi":"10.1306/703C999C-1707-11D7-8645000102C1865D","usgsCitation":"Belitz, K., and Bredehoeft, J.D., 1988, Hydrodynamics of Denver basin: Explanation of subnormal fluid pressures: American Association of Petroleum Geologists Bulletin, v. 72, no. 11, p. 1334-1359, https://doi.org/10.1306/703C999C-1707-11D7-8645000102C1865D.","productDescription":"26 p.","startPage":"1334","endPage":"1359","numberOfPages":"26","costCenters":[{"id":376,"text":"Massachusetts Water Science Center","active":true,"usgs":true}],"links":[{"id":226136,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Colorado, Iowa, Kansas, Nebraska, South Dakota, Wyoming","otherGeospatial":"Denver basin","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"coordinates\": [\n [\n [\n -104.40130307963295,\n 37.43273547761615\n ],\n [\n -94.90669024004416,\n 37.278349382185866\n ],\n [\n -95.73123888547872,\n 43.12625436891602\n ],\n [\n -105.46272051147162,\n 43.243836203561045\n ],\n [\n -104.40130307963295,\n 37.43273547761615\n ]\n ]\n ],\n \"type\": \"Polygon\"\n }\n }\n ]\n}","volume":"72","issue":"11","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a333fe4b0c8380cd5ee62","contributors":{"authors":[{"text":"Belitz, Kenneth 0000-0003-4481-2345 kbelitz@usgs.gov","orcid":"https://orcid.org/0000-0003-4481-2345","contributorId":442,"corporation":false,"usgs":true,"family":"Belitz","given":"Kenneth","email":"kbelitz@usgs.gov","affiliations":[{"id":466,"text":"New England Water Science Center","active":true,"usgs":true},{"id":451,"text":"National Water Quality Assessment Program","active":true,"usgs":true},{"id":27111,"text":"National Water Quality Program","active":true,"usgs":true},{"id":503,"text":"Office of Water Quality","active":true,"usgs":true},{"id":376,"text":"Massachusetts Water Science Center","active":true,"usgs":true}],"preferred":true,"id":367748,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Bredehoeft, John D.","contributorId":86747,"corporation":false,"usgs":true,"family":"Bredehoeft","given":"John","email":"","middleInitial":"D.","affiliations":[],"preferred":false,"id":367749,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70014809,"text":"70014809 - 1988 - A magmatic model of Medicine Lake Volcano, California","interactions":[],"lastModifiedDate":"2024-05-30T16:28:28.825029","indexId":"70014809","displayToPublicDate":"1988-01-01T00:00:00","publicationYear":"1988","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":"A magmatic model of Medicine Lake Volcano, California","docAbstract":"Medicine Lake volcano is a Pleistocene and Holocene shield volcano of the southern Cascade Range. It is located behind the main Cascade arc in an extensional tectonic setting where high-alumina basalt is the most commonly erupted lava. This basalt is parental to the higher-silica calc-alkaline and tholeiitic lavas that make up the bulk of the shield. The presence of late Holocene, chemically identical rhyolites on opposite sides of the volcano led to hypotheses of a large shallow silicic magma chamber and of a small, deep chamber that fed rhyolites to the surface via cone sheets. Subsequent geophysical work has been unable to identify a large silicic magma body, and instead a small one has apparently been recognized. Some geologic data support the geophysical results. Tectonic control of vent alignments and the dominance of mafic eruptions both in number of events and volume throughout the history of the volcano indicate that no large silicic magma reservoir exists. Instead, a model is proposed that includes numerous dikes, sills, and small magma bodies, most of which are too small to be recognized by present geophysical methods.
","language":"English","publisher":"American Geophysical Union","doi":"10.1029/JB093iB05p04412","issn":"01480227","usgsCitation":"Donnelly-Nolan, J., 1988, A magmatic model of Medicine Lake Volcano, California: Journal of Geophysical Research Solid Earth, v. 93, no. B5, p. 4412-4420, https://doi.org/10.1029/JB093iB05p04412.","productDescription":"9 p.","startPage":"4412","endPage":"4420","numberOfPages":"9","costCenters":[],"links":[{"id":226046,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"93","issue":"B5","noUsgsAuthors":false,"publicationDate":"2012-09-20","publicationStatus":"PW","scienceBaseUri":"5059e444e4b0c8380cd46537","contributors":{"authors":[{"text":"Donnelly-Nolan, J.M.","contributorId":104936,"corporation":false,"usgs":false,"family":"Donnelly-Nolan","given":"J.M.","email":"","affiliations":[],"preferred":false,"id":369345,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ]}