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Lake sediments are important archives of past climate variability and lake responses to climate. In order to accurately infer past climates, it is necessary to understand, and account for, the ecological processes that affect the record of indicators preserved in lake sediment. This is particularly the case with respect to the concentration of carbon and nitrogen (TOC, TN, and calculated C:N), and the stable isotope composition of organic matter preserved in lake sediments. These are common, yet ambiguous, tracers of environmental change. Ideally, palaeoenvironmental reconstructions using the ...

Thousands of years into the past, which we can do by looking at ocean sediments and lake sediments -- there's a lynchage -- linkage. >> this is scientifically provable. >> that's right, and we're finding new fates. the fukushima fault that generated the 9.0 earthquake was not even on the charts. it was not known to sustain a 9.0. and so seismologists got it completely wrong with the fukushima disaster. >> we hear about the west coast all the time. people in the mid-south know about in the new madrid fault bit there's another one in tennessee. >> we have to realize, the 1906 san francisco quick...