Biomarkers Used to ID Oil Onshore (image) Bigelow Laboratory for Ocean Sciences Caption Researchers used comprehensive two-dimensional gas chromatography (GCxGC) in their oil spill forensics to measure levels of degradation in biomarkers. THe biomarkers here are shown inside the dotted line. Credit Christoph Aeppli, Bigelow Laboratory for Ocean Sciences Usage Restrictions None Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.