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Biolaminated sedimentation in a High Arctic freshwater lake
Author(s) -
CHUTKO KRYSTOPHER J.,
LAMOUREUX SCOTT F.
Publication year - 2009
Publication title -
sedimentology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.494
H-Index - 108
eISSN - 1365-3091
pISSN - 0037-0746
DOI - 10.1111/j.1365-3091.2009.01049.x
Subject(s) - geology , arctic , sedimentary rock , sequence (biology) , clastic rock , context (archaeology) , sedimentary structures , sediment , ecological succession , paleontology , sedimentation , structural basin , sedimentary depositional environment , oceanography , ecology , genetics , biology
A laminated sequence of lacustrine sediment from an Arctic coastal lake was examined for potential chronological and successional information. The laminae are microbially induced sedimentary structures, the unlithified precursor of stromatolites and are previously unreported in the Arctic. The inferred annual sequence was interpreted to contain a basal clastic unit, overlain with successive cyanobacterial and extracellular polymeric substance units. The complex succession of laminae and inconclusive dating provide a challenge for identifying the chronological nature of the sedimentary structures. Markov chain and time series analyses suggest that a plausible, quasi‐annual sequence can be identified to provide a context for palaeo‐environmental reconstruction. Recognition of sedimentary structure in recent biolaminated sediments offers a first step towards the palaeo‐environmental evaluation of the geomicrobiological sequence.