Sediment Biomarkers for Past Climate Records

Sediment biomarkers can help scientists reconstruct past air and water temperatures. In this method, a group of organic biomarkers called glycerol-dialkyl glycerol-tetraethers, or GDGTs, is studied in modern sediments and in older sediment layers of known age.

GDGTs are produced by a suite of arc...

Accelerated solvent extraction is a fast, efficient, and high-throughput technique used to separate organic biomarkers from large numbers of geological sediment samples.

Traditionally, extraction methods such as sonication or Soxhlet are used, however, the drawback with these protocols is that they are too slow to process enough material f...