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  • Other Sources  (21)
  • AGU  (13)
  • Taylor & Francis  (8)
  • MDPI Publishing
  • 1975-1979  (20)
  • 1890-1899  (1)
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  • Other Sources  (21)
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  • 1
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    The peripheral fields of octopusstellar nerves (1979)
    Taylor & Francis
    In:  Marine Behaviour and Physiology, 6 (1). pp. 25-31.
    Details
    Publication Date: 2020-07-14
    Description: Afferent activity in the stellar nerves of Octopus vulgaris has been recorded in response to a probe applying a mechanical stimulus of approximately 5 gm/mm2 to the inner surface of the mantle. Mechanical sensitivity is distributed throughout the mantle surface and there is a large degree of overlap between the peripheral fields of nearby stellar nerves but no overlap of either ventral or dorsal midline. The afferent activity probably results from stimulation of sensory receptors located in the mantle and skin, but antidromic discharge in motor fibres is also possible.
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  • 2
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    Helium-3 in the Guaymas Basin: Evidence for injection of mantle volatiles in the Gulf of California (1979)
    AGU
    In:  Journal of Geophysical Research: Solid Earth, 84 (B13). pp. 7446-7452.
    Details
    Publication Date: 2020-07-24
    Description: Helium isotope measurements in six major basins in the Gulf of California show that the deep Guaymas Basin has 3He/4He 65–70% higher than atmospheric helium, clear evidence of mantle helium injection. Smaller 3He excesses observed in the Carmen and Farallon basins may be derived from this Guaymas Basin anomaly. The 3He concentrations in the Mazatlan Basin in the mouth of the Gulf of California are similar to average eastern Pacific values, indicating that the Gulf does not provide a significant flux of 3He into the general Pacific circulation. On the basis of temperature and salinity measurements an upper limit of 0.28°C can be placed on the amount of geothermal heating observed in any of the basins. The isotopic ratio of the injected Guaymas Basin helium is found to be 3He/4He = (1.10±0.06) × 10−5, almost identical to the helium signature observed at the Galapagos Rift but somewhat lower than the average ratio in oceanic basalt glasses.
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  • 3
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    The Wadi Natrun: Chemical composition and microbial mass developments in alkaline brines of Eutrophic Desert Lakes (1979)
    Taylor & Francis
    In:  Geomicrobiology Journal, 1 (3). pp. 219-234.
    Details
    Publication Date: 2015-03-10
    Description: Six lakes of the Wadi Natrun, Egypt, were studied with respect to the chemical composition of their brines and the occurrence of microbial mass developments. All investigated lakes showed pH values of approximately 11 and a total salt content of generally more than 30%. The main components were sulfate, carbonate, chloride, sodium, and minor amounts of potassium. Only traces of magnesium and calcium were present, but unusually high concentrations of organic carbon compounds, nitrogen compounds, and phosphate were found. Mass developments of phototrophic sulfur bacteria, halobacteria, cyanobacteria, and green algae were observed. The functions of complete nitrogen and sulfur cycles in the alkaline brines are discussed. The properties of the lakes and their ecology are compared with data on the Dead Sea and Great Salt Lake, Utah.
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  • 4
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    Microbiological fractionation of stable sulfur isotopes: A review and critique (1979)
    Taylor & Francis
    In:  Geomicrobiology Journal, 1 (3). pp. 249-293.
    Details
    Publication Date: 2015-12-08
    Description: Microbiological transformations of sulfur compounds discriminate to various degrees between the stable sulfur isotopes 32S and 34S. Comparatively little is known on isotopic effects associated with sulfur‐oxidizing organisms, and the interpretation of results is complicated since the sulfur pathways are poorly defined and compounds containing two or more sulfur atoms at different oxidation states may be involved. Dissimilatory reduction of sulfate, and sulfite reduction by certain assimilatory microorganisms, causes particularly marked isotopic effects, the expression of which depends on the extent of reaction and other incompletely defined environmental conditions. Models have been proposed to account for these effects based on current knowledge of the reduction pathways. Many of the trends observed during dissimilatory sulfate reduction in the laboratory can also be found in the modern environment leaving little doubt that microbiological factors play a significant role in determining sulfur isotope distributions in nature. However, unusually large isotopic effects, rarely approached in the laboratory, are often observed in nature. The reasons for this are not entirely clear, but in sediments it is possible that diffusional isotopic effects are imposed on biological effects.
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  • 5
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    Heat flow at the spreading centers of the Guaymas Basin, Gulf of California (1979)
    AGU
    In:  Journal of Geophysical Research: Solid Earth, 84 (B12). pp. 6757-6769.
    Details
    Publication Date: 2020-07-24
    Description: Fifty-four new heat flow measurements in the central troughs of the Guaymas basin support the hypothesis that they are sites of active intrusion. In the northern trough a distinct pattern of hydrothermal cooling is revealed, with venting along the western boundary fault of the trough. In the southern trough an analogous pattern is apparently superimposed upon a conductive cooling anomaly associated with a recent central intrusion. The discharge of thermal waters occurs along the boundary faults and through other faults associated with a possible horst block located in the north central floor of the southern trough. The heat flow patterns suggest that the intrusions are episodic and do not occur simultaneously along the length (15–40 km) of a spreading segment. A review of all available heat flow measurements for the Guaymas basin suggests that most of the recharge for a pervasive regional hydrothermal system is limited to the central depressions, with perhaps some contribution from pore water. The discharge of thermal waters occurs predominantly in the central depressions and possibly along the boundary transform faults and fracture zones. The regions of the basin more than a few kilometers in distance from the spreading axis, although presumably underlain by a hydrothermal system, are probably not the location of numerous vents or recharge zones.
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  • 6
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    Paleoceanographic events - recognition, resolution, and reconsideration (1979)
    AGU
    In:  Reviews of Geophysics, 17 (7). pp. 1474-1494.
    Details
    Publication Date: 2020-06-03
    Description: Studies of the last 125 million years of oceanographic and climatic history have benefited greatly from the impetus provided by the Deep Sea Drilling Project. Knowledge of the sedimentary and paleontologic record of the major ocean basins, in conjunction with study of pelagic marine sections exposed on land, has permitted both the testing of old and the development of new hypotheses to explain local and global ocean chemical, sedimentologic and biotic events. Some of the more striking and topical problems in paleoceanography are the oceanic “anoxic events” of early to middle Cretaceous age, the biotic crisis at the Cretaceous/Tertiary boundary, the Eocene/Oligocene extinctions and climatic and circulation events, the Messinian “salinity crisis” (late Miocene) and its effects on the world ocean, and Pleistocene glacial cycles and paleoceanography. Possible explanations of these events, which have been proposed over the last five years, are reviewed in this paper.
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  • 7
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    Some characteristics of seismic activity in China (1978)
    AGU
    In:  Chinese Geophysics, Washington, D.C., AGU, vol. 1, no. 2, pp. 231-244, pp. B06303, (ISSN: 1340-4202)
    Details
    Publication Date: 1978
    Keywords: Earthquake ; Seismicity ; China
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    BIBLIOGRAPHY SEISMOLOGY
  • 8
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    Precursory phenomena and prediction of recent large earthquakes in China (1978)
    AGU
    In:  Bull., Open-File Rept., Chin. Geophys., Washington, D.C., AGU, vol. 1, no. 1, pp. 179-199, (ISBN 0080419208)
    Details
    Publication Date: 1978
    Keywords: Earthquake precursor: prediction research ; JAPAN
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    BIBLIOGRAPHY SEISMOLOGY
  • 9
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    On the present tectonic stress field and present tectonic characteristics of southwestern China (1978)
    AGU
    In:  Bull., Polar Proj. OP-O3A4, Chin. Geophys., Washington, D.C., AGU, vol. 1, no. 1, pp. 79-96, (ISBN: 3-540-23712-7)
    Details
    Publication Date: 1978
    Keywords: Earthquake precursor: prediction research ; Tectonics ; Stress ; Geol. aspects
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    BIBLIOGRAPHY SEISMOLOGY
  • 10
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    Certain characteristics of the Haicheng earthquake (M=7.3) sequence (1978)
    AGU
    In:  Professional Paper, Open-File Rept., Chin. Geophys., Washington, D.C., AGU, vol. 1, no. 2, pp. 289-308, (ISBN 0080419208)
    Details
    Publication Date: 1978
    Keywords: Earthquake precursor: prediction research ; China
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    BIBLIOGRAPHY SEISMOLOGY
  • 11
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    Source parameters for small earthquakes and the Q of the medium before and after the Haicheng earthquake (1978)
    AGU
    In:  Professional Paper, Open-File Rept., Chin. Geophys., Washington, D.C., AGU, vol. 1, no. 1, pp. 125-137, (ISBN 0080419208)
    Details
    Publication Date: 1978
    Keywords: Earthquake precursor: prediction research ; Source parameters ; Attenuation ; Fore-shocks ; Aftershocks ; China ; Quality factor
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    BIBLIOGRAPHY SEISMOLOGY
  • 12
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    Earthquake prediction and geochemical studies in China (1978)
    AGU
    In:  Chinese Geophysics, Washington, D.C., AGU, vol. 1, no. 21, pp. 443-457, pp. B01308, (ISSN: 1340-4202)
    Details
    Publication Date: 1978
    Keywords: Earthquake precursor: prediction research ; Earthquake precursor: chemical (Rn, water(-level,...)
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    BIBLIOGRAPHY SEISMOLOGY
  • 13
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    On the Chinese prediction of earthquakes (1978)
    AGU
    In:  Chinese Geophysics, Washington, D.C., AGU, vol. 1, no. 1-2, pp. 393-424, pp. B05402, (ISSN: 1340-4202)
    Details
    Publication Date: 1978
    Keywords: Earthquake precursor: prediction research ; China
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    BIBLIOGRAPHY SEISMOLOGY
  • 14
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    Coordination in physonectid siphonophores (1978)
    Taylor & Francis
    In:  Marine Behaviour and Physiology, 5 (4). pp. 325-346.
    Details
    Publication Date: 2018-05-22
    Description: Intracellular and extracellular recordings from the stem, gastrozooids, palpons, tentacles and nectophores of physonectid siphonophores are presented. The stem organization previously described for Nanomia applies with only minor differences to Forskalia and Agalma. The endodermal epithelium of the stem is shown to be the pathway for slow potentials. Pumping cycles and feeding activities are organized locally in gastrozooids and palpons. Protective retractions are coordinated, probably through a direct nervous link with the stem. This is also true of tentacles. The ectoderm of bracts is a conducting epithelium; excitation in it can induce nervous activity in the stem, but the mechanism is unknown. Impulse traffic between stem and zooids is erratic and breaks down rapidly with repeated stimulation. The motor centres of the nectophores are connected to the stem by a labile nervous link, but an alternative epithelial pathway exists.
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  • 15
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    Combined laboratory vane and direct shear test procedure for marine soils (1978)
    Taylor & Francis
    In:  Marine Geotechnology, 3 (1). pp. 1-22.
    Details
    Publication Date: 2018-10-29
    Description: From a series of direct shear and laboratory vane shear tests conducted on natural pelagic and terrigenous marine soils, we have proposed a combined shear test procedure that involves obtaining the total stress failure envelope from tests on only two submarine soil samples. On one of the samples, both the direct shear and vane tests are conducted at zero normal stress. The second soil sample is consolidated under normal stress σn greater than the precompression stress Pc and sheared in a direct shear device under normal stress equal to the above consolidation pressure σn , the laboratory vane shear test on the same sample is conducted under zero normal stress. The combined test program results in four datum points (two from direct shear and two from laboratory vane shear tests. By connecting the two vane test datum points, the cohesion line (the failure envelope corresponding to vane shear tests) is obtained. By connecting the direct shear test datum points (from the soil consolidated under cn 〉 Pc) to the origin of the r vs. σn plane, the part of the failure envelope that lies beyond the precompression load is determined. The part of the failure envelope curve below the precompression stress is obtained by drawing a line parallel to the cohesion line through the direct shear datum point (corresponding to zero normal stress). The data and procedure reported herein indicate that the investigator can realize considerable time savings as well as conservation of sometimes expensive and limited submarine soil samples by using the proposed combined test procedure.
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  • 16
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    Geometry of Benioff zones: Lateral segmentation and downwards bending of the subducted lithosphere (1977)
    AGU
    In:  Bull., Polar Proj. OP-O3A4, Island Arcs, Deep Sea Trenches and Back Arc Basins, Englewood Cliffs, AGU, vol. 1, no. XVI:, pp. 99-114, (ISBN: 3-540-23712-7)
    Details
    Publication Date: 1977
    Keywords: Crustal deformation (cf. Earthquake precursor: deformation or strain) ; Seismicity ; Subduction zone ; Seismology ; Inhomogeneity
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    BIBLIOGRAPHY SEISMOLOGY
  • 17
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    Seismic and aseismic slip along subduction zones and their tectonic implications (1977)
    AGU
    In:  Bull., Polar Proj. OP-O3A4, Island Arcs, Deep Sea Trenches and Back Arc Basins, Washington, D.C., AGU, vol. 1, no. 1, pp. 163-174, (ISBN: 3-540-23712-7)
    Details
    Publication Date: 1977
    Keywords: Subduction zone ; Seismicity ; Tectonics ; Plate tectonics ; Creep observations and analysis
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    BIBLIOGRAPHY SEISMOLOGY
  • 18
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    A model for earthquake swarms (1977)
    AGU
    In:  Journal of Geophysical Research, 82 (8). pp. 1347-1352.
    Details
    Publication Date: 2021-03-01
    Description: A model for earthquake swarms in volcanic regions consists of the following concepts: (1) clusters of magma‐filled dikes exist within brittle volumes of the crust, (2) dikes within a cluster are systematically oriented with their long dimension in the direction of the regional greatest principal stress, and (3) a sequence of shear failures (an earthquake swarm) occurs along a system of conjugate fault planes joining en echelon offset dike tips at oblique angles. This model accounts for commonly observed geometric relations between surface faulting patterns, the hypocentral distribution of swarm earthquakes, and fault plane solutions in a variety of situations. Swarm areas dominated by strike‐slip faulting, however, provide the most compelling examples of the utility of the model. Specific examples considered here include a swarm on the east rift zone of Kilauea volcano, Hawaii, and swarms in the Imperial Valley, California, and the Reykjanes Peninsula, Iceland, which represent transitional zones between spreading centers and transform faults.
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  • 19
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    Comparison of prey of the black Procellaria petrels of New Zealand (1976)
    Taylor & Francis
    In:  New Zealand Journal of Marine and Freshwater Research , 10 (1). pp. 119-130.
    Details
    Publication Date: 2020-06-22
    Description: Stomach contents of 68 black petrels, Procellaria parkinsoni, 12 Westland black petrels, P. westlandica, and 3 white‐chinned petrels, P. aequinoctialis, were compared. The main prey were Cephalopoda and fish, and these indicated predominantly nocturnal feeding with selection for bioluminescent forms. There is marked latitudinal variation in the Cephalopoda available to these petrels.
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  • 20
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    Palaeogene ostracods from the continental shelf off Natal, South Africa (1976)
    Taylor & Francis
    In:  Transactions of the Royal Society of South Africa, 42 (1). pp. 35-79.
    Details
    Publication Date: 2020-05-04
    Description: Fifty-two species of Ostracoda are distinguished in the Palaeogene succession of Soekor borehole Jc-1 on the continental shelf off Natal. Two species and one new genus are described, and the ostracod faunas can be grouped into four well-defined assemblages. Vertical variations in the make-up of the ostracod faunas, together with various parameters measured in the forminifera populations, are used to discriminate changes in the conditions of deposition and rates of sediment accumulation. These can be summarized: lower Palaeocene environments were hyposaline, restricted circulation, with rapid accumulation; upper Palaeocene through Eocene conditions were normal marine, alternating restricted and open water circulation, with rapid accumulation in the Palaeocene, and slower accumulation in the Eocene; Oligocene conditions were normal marine, with open water given way to restricted circulation, shallow water environments in the upper part. Sediment accumulation rates in the Oligocene vary rapidly, major changes in the composition of the ostracod populations are recognized as important local biostratigraphical events.
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  • 21
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    The highest waves in water (1893)
    Taylor & Francis
    In:  The London, Edinburgh, and Dublin Philosophical Magazine and Journal of Science, 36 (222). pp. 430-437.
    Details
    Publication Date: 2019-05-14
    Type: Article , PeerReviewed
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