Starting from multidisciplinary punctual results, the authors offer a synthesis of lithologie seismic analysis, sedimentology, palynology and radiometrical measurements from sites in sea and at the border of the Golfe du Lion. The dated samples (more than 120) and the variety of the studied sites has permitted a true methodological approach. The authors also propose a curve of the rising of the Holocene sea that takes into account two major facts: the géomorphologie localisation of the site and the characteristics of the sedimentary environment (sedimentary facies and paleobotanic environment). They conclude to: 1) a generalised rapid rise of the transgression since 14,000 years BP, with an acceleration from 8000 to 6000 years BP; 2) intervals of relative stability from 12 000 to 8 000 years BP; 3) a high sea-level at +2 m at around 4500 years BP.
Mise au point d'une méthode d'évaluation directe des teneurs en uranium des minéraux exempts de thorium par deux mesures d'activité à l'aide de deux compteurs de Geiger
This series reports some of the measurements made since publication of the previous list. Chemical preparation of samples is basically the same as described in Monaco I.The counting electronics of the proportional counter has been entirely rebuilt by J. Galliot and P. Albertinoli of C.S.M. The new device is transistorized and battery-operated. At regular intervals of time, usually 10 min, the count (anti-coincidence channel) is printed in tape. Large deviations from the mean are easily visible and can lead to rejection of the measurement if the distribution is not normal, i.e. does not fit a straight line on Gaussian paper.
The following list of dates includes most of the samples processed from 1968 to 1972. Proportional counting is used and the counting gas is CO2 at constant filling pressure of 740mmHg at 22°C (Thommeret et al., 1969). Samples are counted at least twice on two different counters and errors quoted are averages of standard deviations obtained on each counting.
Created in 1961, the C14 dating laboratory of the Centre Scientifique de Monaco (founded by H. S. H. Prince Rainier III in 1960) made its first dating measurements in 1962.
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