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## Eine Einführung in die Ozeanographie

### Archiv für Meteorologie, Geophysik und Bioklimatologie, Serie A (1977-03-01) 26: 107-108 , March 01, 1977

## Proceedings of tenth general meeting International Mineralogical Association

### Contributions to Mineralogy and Petrology (1977-01-01) 61: 305-320 , January 01, 1977

## Geochemistry of tholeiites from North-East American margin; correlation with Morocco

### Contributions to Mineralogy and Petrology (1977-01-01) 63: 65-74 , January 01, 1977

The chemical variations of the early mesozoic tholeiites from North-East American margin pointed out by the american authors are specified by means of multivariate statistical methods (Principal Component Analysis, Stepwise Discriminant Analysis, Multiple Regression). The highly significant correlation between chemical composition and latitude (R = 0.87) can be explained by an evolution of the initial magma from South to North. As in America, Moroccan High Atlas tholeiites are connected with the early opening of the North-Atlantic. By using these statistical methods, it appears that moroccan tholeiites are chemically related to New-Jersey — Connecticut tholeiites. This “chemical positioning” is compared to predrift reconstruction patterns.

## Chloritoid-bearing metapelites associated with glaucophane rocks in western Crete, Greece

### Contributions to Mineralogy and Petrology (1977-10-01) 60: 321-324 , October 01, 1977

Problems related to the formation of chloritoid in metapelites, associated with lawsonite-glaucophane bearing metabasalts, in the quartzitephyllite series of western Crete (Greece) are discussed. It is supposed that chloritoid was formed, during prograde metamorphism, according to a gliding-equilibrium reaction of the type (Fe,Mg)-carpholite_{1}+chlorite_{1} (Fe,Mg)-carpholite_{1}_{2}+(Fe,Mg)-chloritoid_{1}_{2} +chlorite_{1→2}+quartz+H_{2}O ⇋ (Fe,Mg)-chloritoid_{2}+chlorite_{2}+quartz+H_{2}O. This view is stipulated by the occurrence of ferrocarpholite-chloritoid schists in the southeastern part of central Crete. The assemblage chloritoid+ lawsonite recently recognized in western Crete provides evidence that the formation of chloritoid started well within the stability field of lawsonite.

## Stability of slopes and stresses on the principal slip surface

### Bulletin of the International Association of Engineering Geology - Bulletin de l'Association Internationale de Géologie de l'Ingénieur (1977-12-01) 16: 244 , December 01, 1977

### Summary

The paper deals with the limiting equilibrium and with the distribution of stresses on the principal slip surface in the slope region having variable or constant mechanical characteristics. The proposed grapno-analytical and numerical procedures, defining the distribution of stress components enable us to determine the local stability in every point of the principal slip line.

## Deep-reaching gravitational deformation of mountain slopes

### Bulletin of the International Association of Engineering Geology - Bulletin de l'Association Internationale de Géologie de l'Ingénieur (1977-12-01) 16: 87-94 , December 01, 1977

### Summary

This general report summarizes recent studies concerning gravitational deformations of natural slopes. Many translational rotational, and more complex movements are briefly discussed with respect to rock properties, slope geology, geometry and history. A number of marginal block slides is outlined, their origin being connected with different factors: deep creep, unloading due to errosion or weathering along faults, permafrost thawing. Cases of cambering and valley bulging are reported, ascribed mainly to glaciation and subsequent unloading of the ice-sheet. Special attention is paid to some studies of natural slopes instrumented as test sites. A comprehensive bibliography is given.

## Correlation functions on the upper half space

### Bulletin géodésique (1977-06-01) 51: 149-161 , June 01, 1977

The boundary condition and solution of a Dirichlet problem on the upper half space are treated as random processes. It is shown that the first-and second-order statistics of the solution to this problem are completely determined by the corresponding statistics of the boundary condition. The mean of the solution is the mean of the process on the boundary. The correlation function of the solution above the boundary is related to its value on the boundary by a Poisson integral formula.

## Near-earth turbulence and coherence measurements at Aberdeen Proving Ground, Md.

### Boundary-Layer Meteorology (1977-07-01) 11: 485-506 , July 01, 1977

Turbulence measurements were made at Aberdeen Proving Ground, Maryland, for five separate 24-h periods in August, 1971 to obtain data in support of laser beam propagation through the near-earth atmosphere. Twelve MRI bivanes were used to measure the three components of the wind in both line and space arrays, with bivanes at heights of 1 and 3 m above the surface. The site description, instrument layout and calibration, surface roughness and surface modifications are presented. Selected horizontal wind observations from the micrometeorological observations at Aberdeen Proving Ground, are analyzed in terms of coherence statistics. When plotted against the dimensionless frequency, Δ*f*, coherence estimates follow a curve of the form exp (−*aΔf*) moderately well, but with considerable random scatter.

The decay parameter “*a*” appears to be independent of height from 1 to 3 m, and varies only slightly with Richardson number in the range from −0.07 to +0.05. Its dependence on α, the angle between the mean wind direction and sensor line, is much more pronounced, however, with values of “a” in the crosswind direction (α = 90°) averaging about 3 times larger than those in the downwind direction (α = 0°). This is found for both the longitudinal (*u*) and lateral (ν) wind components, although lateral decay parameters were only about 60% as large as longitudinal ones.

There is some evidence to suggest that decay parameters depend on the ratio*Λ*_{1}/*Λ*_{2} where*Λ*_{1} is the longitudinal length scale, and*Λ*_{2} is the lateral length scale, and also with surface roughness,*z*_{0}, in both the downwind and crosswind directions.

## Transverse vibrations of a beam on a rigid base

### Soviet Mining (1977-01-01) 13: 91-94 , January 01, 1977

## Picrite basalts and related lavas from the Deccan Traps of Western India

### Contributions to Mineralogy and Petrology (1977-01-01) 62: 53-75 , January 01, 1977

Detailed chemical and mineralogical data are given for three sequences of basalts and picrite basalts from bore-holes in Western India. The picrite basalts show bulk compositional variation generated by the fractionation of olivine and chromite. Evolved picrite basalt magma appears to have given rise to basalt by the fractionation of olivine+clinopyroxene, despite the presence of abundant plagioclase phenocrysts. It is suggested that a slow settling rate for plagioclase relative to clinopyroxene and olivine is sufficient to account for this feature. The high degree of equilibrium crystallisation which many of the lavas have apparently undergone is interpreted in terms of the mechanism of compensated crystal settling (Cox and Bell, 1972). Experimentally determined atmospheric pressure phase relations are used to model dyke-like magma chambers in some detail. Finally volumetric and age relationships are used to argue that the picrite basalts, despite their porphyritic nature, crystallised from ultramafic liquids containing in some cases at least 16% MgO.