CONFERENCECharacteristics of the relief and structure of the western part of the Lielauce– Zebrene glaciodepression
Ivars Strautnieks
University of Latvia
Jurgis Armans
University of Latvia
Ineta Grine
University of Latvia
DOI: 10.22364/fg.15.14
Keywords: glaciolimic sediments, deformation structures, striated moraines
Abstract
The article "Characteristics of the relief and structure of the western part of the Lielauce– Zebrene glaciodepression" includes the study of the local area of the Eastern Kursa Upland. Detailed studies have been carried out at the former glacier meltwater basin and adjacent areas. A diversity of glaciolimnic sediments deposited under diverse sedimentation conditions was observed. Silt and varved clay sediments have been distributed in flat plains, where the surface elevation varies from 102 to 117 m above sea level. The results of investigation support the conclusion that several local basins developed in the study area due to the melting of dead ice; after complete melting of the ice, the basins merged and formed a united basin. Ribbed moraines were distributed along the coastline to the north of Lielauce Basin. Their structure is formed by glaciodislocated deposits, as well as by silt and varved clays, which indicate activity of the glacier tongue in the area of the melting water basin. The results of a study make is possible to assess the general development of deglaciation throughout the Eastern Kursa Uplands area.