Analyzing Sediment Samples from Maupiti and Mo’orea: Results

At the beginning of my work this summer we thought that 30 was a good estimate of the number of samples I would be able to run in the time I have at VIMS. After becoming more comfortable with the technique, I became faster and thus I was able to complete the sieving by the end of the summer. As I have mentioned in other posts, however, the sieving is not the end of the analysis. Point counting will provide a view of the lithology of the samples, and analysis with the PICS or RSA will give a closer look at the distribution of the sand-sized grains.

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Analyzing and Interpreting Sediments from Maupiti and Mo’orea: Representing Data and the PICS

Representing Data

I got my first set of data, 10 points of data from the samples I sieved last week. This data, initially, came out in the form of percentages of clay, silt, and sand for each sample. Just seeing the numbers, it’s hard to see patterns and interpret the data. This led to the question of what is the best way to present the data to communicate my results to others and to be able to interpret them myself.

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Analyzing Sediment Samples from Maupiti and Mo‘orea: First week!

This first week (with the help and instruction of VIMS grad student Danielle Tarpley) I was able to sieve and pipette 10 samples of sediments collected by W&M Professor Dr. Kahn from the island of Maupiti, all taken from different depths in an approximately 1.5 m deep test pit at MAU-5 (see abstract for more information about MAU-5 and my previous post for details about the methods I am using).

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Analyzing Sediment Samples from Maupiti and Mo‘orea: Methods

Last week I started my summer research at VIMS, performing grain size analysis on sediment samples from the islands of Maupiti and Mo‘orea in Central East Polynesia (take a look at my abstract for more details on the specifics of the project). When I wrote that abstract at the beginning of the summer, I was planning on analyzing samples from just Maupiti. However, after taking a look at the samples that Dr. Kahn collected in 2014, we decided that in addition to analyzing the two sites on Maupiti, we would be able to look at several samples from the nearby island of Mo‘orea as well. [Read more…]

Abstract: Analyzing and Interpreting Sediment Samples from Maupiti, Central East Polynesia.

Maupiti is the smallest island in the Society Island archipelago in Central East Polynesia. The island was settled sometime between 900 AD and 1200 AD, however sites this age are hard to find as many are underwater due to the island subsiding, while others have been buried by sediment (Kahn et al 2015).

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