![]() |
ИСТИНА |
Войти в систему Регистрация |
ИСТИНА ПсковГУ |
||
Ground wedge features were investigated in Leningrad region of Russia. These features form patterned ground with polygons of different sizes and presented by primary soil, sand, and ice wedges pseudomorphs formed as result of frost cracking before 13 kyr ago. Based on cryogenic contrast coefficient, permafrost in the study area was continuous with mean annual ground temperatures at the depth of zero annual amplitude below –8 °C.