Week 2

Another week in the books. My main progress this week was assigning specific ages to the literature data I compiled. Some of the data tables I found had ages already assigned to the samples that were taken, but many only had a stratigraphic figure showing a plot of δ13C with both a height axis, a section of the geomagnetic polarity time scale, and — in rare instances — an absolute age axis. Luckily, I was able to use the paleomagnetic information in most cases in conjunction with the 2012 Geologic Time Scale to assign ages to the various sections. I would pinpoint a certain height in the section to the moment when a polarity reversal occurred, which in turn allowed me to match this stratigraphic height to exact age, and by using R, I was able to add these data points to each section and assign ages to the rest of the samples by assuming a constant sedimentation rate. Luckily, we do not care about assigning ages too specifically, since we are looking for trends in the data that occur over longer time scales, but it is still a good skill to learn and one that is of utmost importance in any geologic research.


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