Paleomagnetism and magnetostratigraphy of Tarkhanian sediments of the Eastern Paratethus (Skelya section, Kerch peninsula, Crimea)

<p>A detailed paleomagnetic study of Tarkhanian sediments of Skelya section was carried out with the goal to obtained magnetostratigraphy data. The Skelya section is located on the Azov sea side of Kerch peninsula, Crimea (45<sup>o</sup>42′N, 36<sup>o</sup>53′E). The Tarkhanian sediments of Skelya section are represented mainly of clays and have a total thickness of ~ 100 m. According to GTS (2012), the Tarkhanian stage of Miocene is related to the lower part of the Langhian of the General Stratigraphic Scale. Standard paleomagnetic measurements have been carried out to investigate magnetic parameters: natural remenent magnetization, magnetic susceptibility, saturation remanent magnetization, anhysteretic   remanent magnetization varied through out the section. The remanent coercitivity force, determined from backfield demagnetization measurements, range between ~34 and 67 mT.   The composition of the ferromagnetic fraction was examined using temperature dependences of saturation remanent magnetic moment. The thermomagnetic analysis showed that the blocking temperatures are  about 320<sup> o</sup>C and 410-470<sup> o</sup>C and  greigite and titanomagnetite  are the main carriers of NRM in the section.  The biplot of  IRM<sub>-100 mT</sub> / SIRM versus  ARM<sub>40mT </sub>/SARM showed that the ratios fall down into the field around the titanomagnetite and greigite areas. The pseudo-single domain  state of titanomagnetite and greigite was determined from their Mrs/Ms and Bcr/Bc ratios by Day-plot. Paleomagnetic studies have shown that the interval of the Kuvinian beds in its upper part is composed of sediments of reversal polarity magnetization. The rocks of the Terskian and Argunian beds are characterized by intervals of normal and reversed polarity magnetization. This work was supported by Russian Science Foundation, project № 19-77-10075.</p>

The first definition of paleointensity in the Early Cretaceous basalts from the Franz Josef Land

<p>We present the first definition of paleointesity of the Earth’s magnetic field that were obtained in the Early Cretaceous igneous rocks from the Franz Josef Land archipelago (Hooker and Scott Kelty Islands). The age of magmatism was determined by U-Pb method as the Early Cretaceous, about 125 Ma. A mean paleomagnetic direction for these rocks was calculated as D=40.2 deg, I=75.5 deg, a95=2.1 deg, k=89.3, N=52. A corresponding paleomagnetic pole is now located at Plat=69.0 deg; Plon=180.3 deg, A95=3.7 deg. An assessment of the domain structure of ferrimagnets using the Day plot diagram shows that the carriers of the natural remanent magnetization are pseudo-single-domain grains of titanomagnetites with varying Ti-content. Magnetic remanence was unblocked in temperatures of 350-400 °C. Some samples are characterized by unblocking temperatures of 560 °C. The determinations of the absolute values of paleointensity were obtained by the Thellier-Coe method with the implementation of the procedure "check-points". The values of B<sub>anc</sub> vary within 8.4–16 µT, which is noticeably lower than the current magnetic field at the sampling point ≈55 µT. The corresponding VDMs of 1.13–2.25 × 10<sup>22</sup> Am<sup>2</sup>, with the current value of VDM ≈8 × 10<sup>22</sup> Am<sup>2</sup>. Numerous basalt flows are well studied by paleomagnetic and rockmagnetic methods, together with a large number of geochronological definitions, this makes basalts from the Franz Josef Land promising for obtaining new qualitative determinations of paleointensity in the Early Cretaceous time.</p><p>This work was supported by the RSF (project no. 19-17-00091) and the RFBR (project nos. 18-35-00273, 18-05-70035).</p>

André Bazin, Film Critic for Le Parisien libéré (1944–1958): An Enlightened Defender of French Cinema

This article examines a neglected dimension of Bazin's work, namely his writings for the daily newspaper Le Parisien libéré. Four key points emerge from this corpus. First, Bazin goes beyond the film-reviewing norms of the day (plot summary and evaluation of actors' performances) to analyse the intentions and achievements of the film-makers. Second, Bazin foregrounds the capacity of cinema to address the concerns of contemporary society. Third, as a result, he ascribes a particular value to films that actively engage with the new social realities of post-war France. Four, Bazin remains blind to the misogynistic dimension of post-war French cinema, with its tendency to culpabilize women for the national disgrace of the Occupation. Ultimately, Bazin's newspaper reviewing represents a more socially aware vision of cinema than that promoted by more specialized cinema journals, yet his criticism remains caught within the gender ideology of his time.

CONTRIBUTION OF GROWTH RATE AND HARVEST INDEX TO GRAIN YIELD IN F9-DERIVED LINES OF OATS (AVENA SATIVA L.)

The contributions of growth rate (GR) and harvest index (HI) to grain yield (GYD) were studied using 1200 F9-derived lines of oats tested for 2 yr. Heritability ranged from 20 to 40% for GYD, GR, and HI. Genotypic correlations of GYD with GR were ca. 0.7 and with HI ca. 0.3. More than 95% of GYD variation was due to GR and HI. An increase of 0.1 g/day/plot GR would result in a 14% increase in GYD, and a 5% increase of HI would cause an 18–19% increase in GYD. GR was positively correlated with heading date and plant height, and negatively with HI.