Kyanite-Gedrite Parageneses

1939 ◽  
Vol 76 (7) ◽  
pp. 326-330 ◽  
Author(s):  
C. E. Tilley

Discussion of the genesis of kyanite-amphibole associations in amphibolites has so far been limited to assemblages involving common hornblende (1). Striking examples of an association of kyanite with rhombic amphibole (gedrite) now known from the Archaean gneisses of the White Sea area, Russia, visited by the Northern Excursion of the International Congress in 1937, probably provide one of the first records of this paragenesis in the literature.1 The rocks of the region include coarse-grained garnet and kyanite rich gneisses associated with amphibolites in the Shueretsky district of Karelia, and have been described by Ignatiev (2).

2019 ◽  
Vol 11 (9) ◽  
pp. 2605-2618 ◽  
Author(s):  
Nadezhda V Terekhanova ◽  
Anna E Barmintseva ◽  
Alexey S Kondrashov ◽  
Georgii A Bazykin ◽  
Nikolai S Mugue

Abstract Adaptation of threespine stickleback to freshwater involves parallel recruitment of freshwater alleles in clusters of closely linked sites, or divergence islands (DIs). However, it remains unclear to what extent the DIs and the alleles that constitute them coincide between populations that underwent adaptation to freshwater independently. We examine threespine sticklebacks from ten freshwater lakes that emerged 500–1500 years ago in the White Sea basin, with the emphasis on repeatability of genomic patterns of adaptation among the lake populations and the role of local recombination rate in the distribution and structure of DIs. The 65 detected DIs are clustered in the genome, forming 12 aggregations, and this clustering cannot be explained by the variation of the recombination rate. Only 21 of the DIs are present in all the freshwater populations, likely being indispensable for successful colonization of freshwater environment by the ancestral marine population. Within most DIs, the same set of single nucleotide polymorphisms (SNPs) distinguish marine and freshwater haplotypes in all the lake populations; however, in some DIs, freshwater alleles differ between populations, suggesting that they could have been established by recruitment of different haplotypes in different populations.


Author(s):  
Владимир Васильевич Меншуткин ◽  
Николай Николаевич Филатов ◽  
Vladimir Menshutkin ◽  
Nikolay Filatov

2020 ◽  
pp. 108-116
Author(s):  
Galina Budnik

The book of memoirs of Norwegian entrepreneur Egil Abrahamsen about his work in Arkhangelsk province in 1908—1928 is analyzed. The author highlights stories related to the revolutionary events of 1917, foreign intervention, and the establishment of the Soviet regime in the European North of Russia. Attention is drawn to the description of the life and traditions of the inhabitants of the White Sea area: the Pomors, representatives of the Orthodox clergy, Old Believers, peasants, lumbermen and sawmill workers. It is concluded that the book expands readers’ understanding of the history and culture of Russia and forms a respectful attitude to the citizens of Russia and Norway.


2001 ◽  
Vol 37 (3) ◽  
pp. 10
Author(s):  
V. L. Burkovskiy ◽  
A. K. Kashunin ◽  
A. I. Azovskiy

2019 ◽  
Vol 59 (6) ◽  
pp. 1089-1092
Author(s):  
I. V. Miskevich ◽  
A. V. Leshchev ◽  
D. S. Moseev ◽  
A. S. Lokhov

In the winter low water season in March and the first week of April 2019, complex hydrological and hydrochemical studies were carried out at the mouths of two small rivers of the White Sea catchment basin (the Mudyuga river, which flows into the Dvina Bay, and the Tamitsa river, which flows into the Onega Bay). The results indicate significant differences in the short-period variability of hydrological and hydrochemical parameters in the winter in the studied river mouths compared with the characteristics observed in the tidal estuaries of large and medium rivers, as well as in the mouths of small rivers of the southern seas.


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