%0 Journal Article
%T Grain-Size Distribution and Structural Characteristics of Varved Sediments from Lake £żabi¨½skie (Northeastern Poland)
%J Quaternary | An Open Access Journal from MDPI
%D 2019
%R https://doi.org/10.3390/quat2010008
%X Typically, the description of varve microfacies is based on microscopic sedimentary structures, while standard grain-size analysis is commonly applied with lower resolution. Studies involving a direct comparison of varve microfacies and particle-size distributions, common for clastic environments, are scarce for biogenic varves. In this study, we analyzed nine-year resolution grain-size data from Lake £żabi¨½skie (northeastern Poland) to detect differences between varve microfacies. Six varve microfacies were differentiated using grain-size distributions and sedimentological attributes (calcite layer thickness, dark layer thickness, mass accumulation rate). However, changes in particle-size distributions between different varve types are relatively small and indicate a similar source for the material deposited. Decomposition of grain-size distributions with the end-member approach allows recognition of relative changes for the deposition of allochthonous (mineral) and autochthonous (carbonates, (hydr)oxides) components. Grain-size data suggest that sources of allochthonous material remained constant, while varve formation was controlled mostly by in-lake processes. View Full-Tex
%U https://www.mdpi.com/2571-550X/2/1/8