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804073 Method of the identification and classification of pyroclastic soil deposits due to hardness
64A
partially closed cracks. It is concluded that under in situ (small strain) comditions, frictional attenuation becomes secondary to linear loss mechanisms. 804066 FIE-GRAINED COLLIERY DISCARD AND ITS SUSCEPTIBILITY TO LIQU~ACTION AND FLOW UNDER CYCLIC STRESS Taylar, R K; Morrell, G R Engng Geol, V14, ~ , Oct 1979, P219-229 Reports triaxial cyclic loading tests in which granular types are shown to be the most susceptible to liquefaction. The more plastic discards exhibit a slow build-up in pore-water pressure and gradual drop in effective stress with increasing shear strain. Plasticity iDdex is advOcated as a useful physical parameter in assessing the general liquefaction potential of sediments of this type. Obse~vatlons of mobile discards following liquefaction suggest that effective stress is the most important determlnant of apparent viscosity. 804067 COMI~SSIONAL AND SHEAR WAVE V~LOCITIES AT HIGH TEMPERATURE AND CONFINING PRESSURE IN BASALTS FROM THE FAEROE ISLANDs Ke~n, H; Richter, A Tectonophysies, V54, 1979, P231-252 804068 VARIATIONAL APPROACH TO ELASTIC WAVE PROPAGATION IN ANOMALOUS LAYERs Mainardi, F; Servlzi, G; Turchetti, G Geophys J R Astr Soc, V57, NI, April 1979,
Presents a classification system providing a quantitative appraisal of rock durability with special reference to tunmellir~, based on geomechamlcal studies comducted on the Karoo sedimentary rocks. The studies were carried out during construction of the OramgeFish Tunmel, Cape Province, South Africa. The new Geodt~ability Classification is based on different ratios of the unlaxlal compressive strength add the 'Duz~an' free swelling coefficient. The relevance of weathering behavlour to tunnelling in eo~pacted and weakly cemented rocks is emphasised. 804-073 METHOD OF THE IDENTIFICATION AND CLASSIFICATION OF PYROCIASTIC SOIL DEPOSITS DUE TO HARDNESS Haruymna, M soils Found, V19, NI, March 1979, I~i-92 The method uses hardness, as measured by Yamanaka's hardness tester, to classify soils at 145 locations in southern Kyuahu, Japan. Carrelations between hardness, dry density, add water content are also given.
Geology 8o4o74 EXFEMIMENTAL STUDY OF FRACTURE AT GEOLOGICAL SCALE VELOCITIES Mulargia, F; Bonafede, M; Boschi, E Geophys J R Astr SOC, V60, NB, March 1980,
P321-325 80406 9 VARIATION OF EFFECTIVE SEISMIC VELOCITIES OF MINERALs WITH PRESSURE AND ITS USE IN VELOCITY PREDICTION Hall~ J; Ai-Haddad, F M Geophys J R Astr Soc, V57, NI, April 1979, Pi07-118
Classification and identification See also: 804214 804070 GEOTECHNICAL CLASSIFICATION OF SOILS i - NOTE ON THE LPC CLASSIFICATION (IN FRENCH) Magn~n, J P Bull Liaison Lab Ponts Chaussees, NI05, JanFeb 1980, P49-52 804071 GEOTECHNICAL CLASSIFICATION OF SOILS 2 - MECHA ~ S A ~ O ~ OF ~ ~N ~ ~ S T FOR O ~ C SOILS (IN FRENCH) Lagrange, M; Perrin, J; Magnan, J P Bull Liaison Lab Ponts Chaussees, N105, JanFeb 1980, 1=53-56 Describes the apparatus which has been developed for the laboratory performance of the Von Post humification test used for the geotechnical classification of organic soils. Examination of the nature, colour and quantity of the substances expelled frc~ the sample of o~ganic soil makes it possible to rationally determine the position of the soll in the Yon Post humlfication scale. The colour is determined with reference to the MUnsell colour scale. 804072 NEW ENGINEERING-GEOLOGICAL ROCK DURABILITY CLASSIFICATION Olivler, H J Eng~g Geol, V14, ~4, 0ct 1979, P255-279
Describes experiments at extremely low crack propagation velocities, implying extremely low stress values. Envlrommental factors such as htm~idity, presence of liquid, were also varied.
Tectonic processes 804075 STRESS AND T ~ T U R E IN THE BENDING LITHOsPHERE AS CONSVfRAINED BY EXPERIMENTAL ROCK MECHANICs Goetze, C; Evans, B Geophys J R Astr SOC, V59, N3, Dec 1979, P463-478 Uses data from brittle failure and ductile f l ~ of rock to infer certain aspects of plate behavlour at a consuming plate margin. 804076 REVIEW OF PLATE TECTONICS Burke, K; Sengor, A M C Revs Geophys Space Phys, V17, N6, Sept 1979, PI081-I090 A review of recent advances in the following sections: slm~e~dlng centres, ageing of oceanic lithosphere, transform faults, s~bduetion zones, continental rupture add rift systems, intraplate phenomena, plate tectonics in earth histc~y. 178 refs.
Environmental effects, weathering and soil formation 804077 DEVELOPMENT OF PIPING EROSION CONDITIONS IN THE BENSON AREA, ARIZONA, USA Masam~t~ Y M Q J Emgng Geol, VI3, NI, 1980, P53-61
partially closed cracks. It is concluded that under in situ (small strain) comditions, frictional attenuation becomes secondary to linear loss mechanisms. 804066 FIE-GRAINED COLLIERY DISCARD AND ITS SUSCEPTIBILITY TO LIQU~ACTION AND FLOW UNDER CYCLIC STRESS Taylar, R K; Morrell, G R Engng Geol, V14, ~ , Oct 1979, P219-229 Reports triaxial cyclic loading tests in which granular types are shown to be the most susceptible to liquefaction. The more plastic discards exhibit a slow build-up in pore-water pressure and gradual drop in effective stress with increasing shear strain. Plasticity iDdex is advOcated as a useful physical parameter in assessing the general liquefaction potential of sediments of this type. Obse~vatlons of mobile discards following liquefaction suggest that effective stress is the most important determlnant of apparent viscosity. 804067 COMI~SSIONAL AND SHEAR WAVE V~LOCITIES AT HIGH TEMPERATURE AND CONFINING PRESSURE IN BASALTS FROM THE FAEROE ISLANDs Ke~n, H; Richter, A Tectonophysies, V54, 1979, P231-252 804068 VARIATIONAL APPROACH TO ELASTIC WAVE PROPAGATION IN ANOMALOUS LAYERs Mainardi, F; Servlzi, G; Turchetti, G Geophys J R Astr Soc, V57, NI, April 1979,
Presents a classification system providing a quantitative appraisal of rock durability with special reference to tunmellir~, based on geomechamlcal studies comducted on the Karoo sedimentary rocks. The studies were carried out during construction of the OramgeFish Tunmel, Cape Province, South Africa. The new Geodt~ability Classification is based on different ratios of the unlaxlal compressive strength add the 'Duz~an' free swelling coefficient. The relevance of weathering behavlour to tunnelling in eo~pacted and weakly cemented rocks is emphasised. 804-073 METHOD OF THE IDENTIFICATION AND CLASSIFICATION OF PYROCIASTIC SOIL DEPOSITS DUE TO HARDNESS Haruymna, M soils Found, V19, NI, March 1979, I~i-92 The method uses hardness, as measured by Yamanaka's hardness tester, to classify soils at 145 locations in southern Kyuahu, Japan. Carrelations between hardness, dry density, add water content are also given.
Geology 8o4o74 EXFEMIMENTAL STUDY OF FRACTURE AT GEOLOGICAL SCALE VELOCITIES Mulargia, F; Bonafede, M; Boschi, E Geophys J R Astr SOC, V60, NB, March 1980,
P321-325 80406 9 VARIATION OF EFFECTIVE SEISMIC VELOCITIES OF MINERALs WITH PRESSURE AND ITS USE IN VELOCITY PREDICTION Hall~ J; Ai-Haddad, F M Geophys J R Astr Soc, V57, NI, April 1979, Pi07-118
Classification and identification See also: 804214 804070 GEOTECHNICAL CLASSIFICATION OF SOILS i - NOTE ON THE LPC CLASSIFICATION (IN FRENCH) Magn~n, J P Bull Liaison Lab Ponts Chaussees, NI05, JanFeb 1980, P49-52 804071 GEOTECHNICAL CLASSIFICATION OF SOILS 2 - MECHA ~ S A ~ O ~ OF ~ ~N ~ ~ S T FOR O ~ C SOILS (IN FRENCH) Lagrange, M; Perrin, J; Magnan, J P Bull Liaison Lab Ponts Chaussees, N105, JanFeb 1980, 1=53-56 Describes the apparatus which has been developed for the laboratory performance of the Von Post humification test used for the geotechnical classification of organic soils. Examination of the nature, colour and quantity of the substances expelled frc~ the sample of o~ganic soil makes it possible to rationally determine the position of the soll in the Yon Post humlfication scale. The colour is determined with reference to the MUnsell colour scale. 804072 NEW ENGINEERING-GEOLOGICAL ROCK DURABILITY CLASSIFICATION Olivler, H J Eng~g Geol, V14, ~4, 0ct 1979, P255-279
Describes experiments at extremely low crack propagation velocities, implying extremely low stress values. Envlrommental factors such as htm~idity, presence of liquid, were also varied.
Tectonic processes 804075 STRESS AND T ~ T U R E IN THE BENDING LITHOsPHERE AS CONSVfRAINED BY EXPERIMENTAL ROCK MECHANICs Goetze, C; Evans, B Geophys J R Astr SOC, V59, N3, Dec 1979, P463-478 Uses data from brittle failure and ductile f l ~ of rock to infer certain aspects of plate behavlour at a consuming plate margin. 804076 REVIEW OF PLATE TECTONICS Burke, K; Sengor, A M C Revs Geophys Space Phys, V17, N6, Sept 1979, PI081-I090 A review of recent advances in the following sections: slm~e~dlng centres, ageing of oceanic lithosphere, transform faults, s~bduetion zones, continental rupture add rift systems, intraplate phenomena, plate tectonics in earth histc~y. 178 refs.
Environmental effects, weathering and soil formation 804077 DEVELOPMENT OF PIPING EROSION CONDITIONS IN THE BENSON AREA, ARIZONA, USA Masam~t~ Y M Q J Emgng Geol, VI3, NI, 1980, P53-61