Skip to main content
U.S. flag

An official website of the United States government

USGS scientists collect and redeploy Gulf of Mexico Sediment Trap

USGS Scientist Julie Richey (USGS, Research Geologist) and collaborator from the University of South Carolina Eric Tappa will collect and redeploy the Gulf of Mexico Sediment Trap for the 22nd time, from February 26–28, 2019.

A sediment trap time series in the northern Gulf of Mexico is used to better assess the control of environmental variables (e.g., temperature and salinity) on the flux of both microfossils and molecular fossils to the sediments. The information gained from sediment trap studies is used to develop better proxy-based estimates of past oceanographic conditions from analyses of microfossils and molecular fossils in sediment cores. Scientists at the USGS are using a long-running sediment trap (2008–2019+) in the northern Gulf of Mexico to calibrate foraminifera, biomarker, and other micropaleontological proxies for use in climate reconstructions.


Read what else is new at the St. Petersburg Coastal and Marine Science Center.

photos of sediment sampling, the R/V Pelican, and sediment analysis
Samples are recovered from the sediment trap once every 9-12 months. Cruises to recover and redeploy the mooring take place on the UNOLS vessel, R/V Pelican, operated by LUMCON, in Cocodrie, Louisianna. On these cruises water is collected for isotopic and trace metal analysis, as well as to measure parameters of the carbonate system (dissolved inorganic carbon, total alkalinity, pH). Sometimes live foraminifera are collected with a plankton net for additional geochemical and genetic analyses.

Get Our News

These items are in the RSS feed format (Really Simple Syndication) based on categories such as topics, locations, and more. You can install and RSS reader browser extension, software, or use a third-party service to receive immediate news updates depending on the feed that you have added. If you click the feed links below, they may look strange because they are simply XML code. An RSS reader can easily read this code and push out a notification to you when something new is posted to our site.