Sampling for radiocarbon dating was hindered by a lack of macro
organic material in the long cores throughout the lake. A whole
mollusk valve and shell fragments were retrieved from the base of
three cores well below the onset of the laminated sediments. Sediment
was sampled from the varved sediments and submitted for humin and
humic acid extraction in an attempt to independently confirm the
varved nature of the entire sequence of sediments. Carbon extractions
from the sediment samples provided only extremely small quantities of
carbon (<0.01 µ g). Results from the radiocarbon dating failed to
confirm the varve chronology and major dating reversals and
inconsistencies with the dated shells make all of the dates from
within the laminated sediments highly suspect.