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In cooperation with the National Park Service

Effects of Oil and Gas Production on Lake Meredith Sediments, 1964–99

By B.J. Mahler and P.C. Van Metre

U.S. Geological Survey
Fact Sheet 072–01

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pdf (934 KB)


How We Sample

Sample Collection and Age-Dating of Sediment Cores

Trace Elements

Polycyclic Aromatic Hydrocarbons and Other Petroleum Biomarkers

Organochlorine Compounds

Conclusions and Implications



1.   Map showing Lake Meredith sampling sites
2–4.   Graphs showing:
  2.   Concentrations of trace elements in surficial sediments and cores
  3.   Concentrations of total PAHs, ratios of PAH assemblages, and ratios of pristane to phytane in surficial sediments and cores
  4.   Concentrations of total DDT and total PCBs in surficial sediments and cores

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