Earthquake magnitude scales. Technical note

Earthquake magnitude scales. Technical note

I31A Geology 826050 SPREADING OF ROCK AVALANCHE DEBRIS BY MECHANICAL FLUIDIZATION Davies, T R H Rock Mech, VI5, NI, June 1982, P9-24 Two hypotheses f...

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Geology 826050 SPREADING OF ROCK AVALANCHE DEBRIS BY MECHANICAL FLUIDIZATION Davies, T R H Rock Mech, VI5, NI, June 1982, P9-24 Two hypotheses for the motion of large rock avalanches (sturzstroms) are examined: (a) that sturzstrom deposits result from the spreading of a mass of debris in a fluidised state under the influence of gravity, and (b) that the I~.L~,:.~ becomes fluldised 1~ecause of the existence of a high shear rate in the basal region. The first hypothesis is supported by data describing the length of sturzstrom deposits, and the secor~ is shown to be in agreement with simple laberatory tests, with the grain-flow theery of Bagnold asi with the ch8racteristic features of sturzstrom deposits. Auth.

826053 POTE~CIAL USE OF A DEGRADABLE EROSION OON~OL MEMBRANE IN ~ E UNITED KINGDOM. TECKNICAL NOTE Henderson, M S Q J Emgrg Geol, VIS, NB, 1982, F233-234 Describes the action ~ u~e of membrane (knitted yarn cetti~g interwoven wi~h strips of biodegradable paper) to ~revent erosion of soil. 826054 GECS~L~HANICS OF SOIl CONSERVA_~ION Hawley, J G; l.uckman, P G Proc ~'d Australia-New Zealamd Cor~erence on Ge~nech~nics, W e l l i ~ o n , 12-16 May 1980, V2, P~3-60. P ~ I Wellington: New Zeala~i l~stitution of Em~ne~s, 1980 C~remt rates of soil loss, particularly from

hill country p~sture, are seen to be ,a m ~ c r cause f~r concern. Five types of situation are described in whi,lh the application of ge(~ mechanics conceits and techniques ear. contribute t o ~ I s reducing r~tes of loss of soil. These five ty?0es relate to engineering geological ~roblems, slaking problems, strength l~oble~s, dispersion problems and infiltration problems. A~fah.

Tectonic processes 826051 GEOLOGICAL STRUCTURE AND THE TECTONIC EVOLUTUON AS FACTORS OF INSTABILITY IN THE PINDOS ZONE AREA (GREECE) Ar~r onopoulos, B Rock Mech, VIS, NI, June 1982, P~I-54 In the Imesent study the geologlc-lithological structure, as well as the tectonic evolution of the Pindos Zone (mainly thin plated Upper Cretaceous limestones) are examined in correlation with the acting mechanism and causes of the observed mobilisationo In addition, it is argued that the principal factors of instability, which 'Irepsre' certain locations in long-term l~ocess for landslide manifestations, are connected with the geological structure and tectonic evolution of the Pindos Zone and some particular characteristics of it. These feat~es constitute 'inherent alpine factors of instability' which, acting at places in conjunction with certain secomdary exogene ones, progressively generate conditions of critical looseness of the rock. Finally, the observed instability of the Cerinthian gulf coastal slopes is mentioned, which is also closely connected with the prevailing vertical neotectonic movements and the accumulation of stresses in this active trough.

Environmental effects, weathering and soil formation See also: 826188 826052 TAILINGS AND SOILS Rutherford, G K; Van Loon, G W CIM Bull, W S , N837, Jan 1982, I%0-65 Soil fc~ming factors are first discussed: parent material, drainage, climate, vegetation, time, and the effects of man. Soil and tailings ~roparties far the Sudbury area, Canada, are then compared: texture~ structure, colot~, moisture conditions, wind erosion effects, chemistry, mineralogy, and microbiology. It is co~clmded that tailings and soils have similar lilysical and chemical properties with respect to plant nutrition and geomorphology.

Earthquake mechanisms and effects 826o55

EAR..~QUAKE ~IAG~rI."NfDESCALES° TECHNICAL NOTE Nuttli, 0 W; H~-rmann, R B J Geotecb E:~gr~ Div ASCE. VI08, NGTS, May 1982, P783-786

Hydrogeology 626056 PHYSICAL CONTROLS OF WATER M O V ~ IN THE UNSATUPJ~TED ZONF Wellings, S R; Bell, J P Q J E[0gng Geol, ~q5, ~f3, 1982, P235-241 ~ l l t i o n ~ l h~rogeological cormepts of the unsaturated zone imply that the water" is essentially static, and do ~ t~ke account of the dynamic rmture of the annual water cycle in the field. The basic concepts of ~ t e r content, water potentiel ard unsaturated hydraulic conductivity axe defined as t2,ey ~ e developed in soil physics and 8pplied to the flo~ of water in the m maturated zone. The emphasis is on a Fracileal and non-ln~erical description of what happens in the field. 826057 HYDROGEOLOGICAL CONDITIONS IN THE MIDDLE EAST B-n~ion, D J Q J E r g ~ Oeol, VI5, ~ , ].982, ~71-82 826058 HYT~RCGEOLOGY OF ~ } ~ # . AND SIRTE BASINS, EA:)~I~N LIB~V~ Wrig~t, E P; Benfleid, A C; E~hmlnds, W M

Q J E r ~ g Gaol, VlS, N2, 1982, P63-I03 826059 UYDROGEOLOGY OF THE U~M ER R A D I ~ A AQUIF~., SAUDI AR~BYA, kqTH REFERENCE TO FOSSTL GP~J)IENTS Bakiewicz, W; Milme, D M; Noari. M Q J Engn~ Geol, VIS, N2~ 1982, PI05-126