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Sediment Core Extrusion Method At Millimeter Resolution Using A Calibrated, Threaded-Rod, Patrick Schwing, Isabel C. Romero, Rebekka A Larson, Bryan J. O'Malley, Erika E Fridrik, Ethan Goddard, Gregg R Brooks, David Hastings, Brad Rosenheim, David Hollander, Guy Grant, Jim Mulhollan
Sediment Core Extrusion Method At Millimeter Resolution Using A Calibrated, Threaded-Rod, Patrick Schwing, Isabel C. Romero, Rebekka A Larson, Bryan J. O'Malley, Erika E Fridrik, Ethan Goddard, Gregg R Brooks, David Hastings, Brad Rosenheim, David Hollander, Guy Grant, Jim Mulhollan
Marine Science Faculty Publications
Aquatic sediment core subsampling is commonly performed at cm or half-cm resolution. Depending on the sedimentation rate and depositional environment, this resolution provides records at the annual to decadal scale, at best. An extrusion method, using a calibrated, threaded-rod is presented here, which allows for millimeter-scale subsampling of aquatic sediment cores of varying diameters. Millimeter scale subsampling allows for sub-annual to monthly analysis of the sedimentary record, an order of magnitude higher than typical sampling schemes. The extruder consists of a 2 m aluminum frame and base, two core tube clamps, a threaded-rod, and a 1 m piston. The sediment …
Sedimentation Pulse In The Ne Gulf Of Mexico Following The 2010 Dwh Blowout, Gregg R. Brooks, Rebekka A. Larson, Patrick Schwing, Isabel C. Romero, Christopher Moore, Gert-Jan Reichart, Tom Jilbert, Jeff P. Chanton, David W. Hastings, Will A. Overholt, Kala P. Marks, Joel E. Kostka, Charles W. Holmes, David Hollander
Sedimentation Pulse In The Ne Gulf Of Mexico Following The 2010 Dwh Blowout, Gregg R. Brooks, Rebekka A. Larson, Patrick Schwing, Isabel C. Romero, Christopher Moore, Gert-Jan Reichart, Tom Jilbert, Jeff P. Chanton, David W. Hastings, Will A. Overholt, Kala P. Marks, Joel E. Kostka, Charles W. Holmes, David Hollander
Marine Science Faculty Publications
The objective of this study was to investigate the impacts of the Deepwater Horizon (DWH) oil discharge at the seafloor as recorded in bottom sediments of the DeSoto Canyon region in the northeastern Gulf of Mexico. Through a close coupling of sedimentological, geochemical, and biological approaches, multiple independent lines of evidence from 11 sites sampled in November/December 2010 revealed that the upper ~1 cm depth interval is distinct from underlying sediments and results indicate that particles originated at the sea surface. Consistent dissimilarities in grain size over the surficial ~1 cm of sediments correspond to excess 234Th depths, which …
Hydrocarbons In Deep-Sea Sediments Following The 2010 Deepwater Horizon Blowout In The Northeast Gulf Of Mexico, Isabel C. Romero, Patrick Schwing, Gregg R Brooks, Rebekka A Larson, David W. Hastings, Greg Ellis, Ethan Goddard, David Hollander
Hydrocarbons In Deep-Sea Sediments Following The 2010 Deepwater Horizon Blowout In The Northeast Gulf Of Mexico, Isabel C. Romero, Patrick Schwing, Gregg R Brooks, Rebekka A Larson, David W. Hastings, Greg Ellis, Ethan Goddard, David Hollander
Marine Science Faculty Publications
The Deepwater Horizon (DWH) spill released 4.9 million barrels of oil into the Gulf of Mexico (GoM) over 87 days. Sediment and water sampling efforts were concentrated SW of the DWH and in coastal areas. Here we present geochemistry data from sediment cores collected in the aftermath of the DWH event from 1000-1500 m water depth in the DeSoto Canyon, NE of the DWH wellhead. Cores were analyzed at high-resolution (at 2 mm and 5 mm intervals) in order to evaluate the concentration, composition and input of hydrocarbons to the seafloor. Specifically, we analyzed total organic carbon (TOC), aliphatic, polycyclic …
A Decline In Benthic Foraminifera Following The Deepwater Horizon Event In The Northeastern Gulf Of Mexico, Patrick Schwing, Isabel C. Romero, Gregg R Brooks, David W Hastings, Rebekka A Larson, David Hollander
A Decline In Benthic Foraminifera Following The Deepwater Horizon Event In The Northeastern Gulf Of Mexico, Patrick Schwing, Isabel C. Romero, Gregg R Brooks, David W Hastings, Rebekka A Larson, David Hollander
Marine Science Faculty Publications
Sediment cores were collected from three sites (1000-1200 m water depth) in the northeastern Gulf of Mexico from December 2010 to June 2011 to assess changes in benthic foraminiferal density related to the Deepwater Horizon (DWH) event (April-July 2010, 1500 m water depth). Short-lived radioisotope geochronologies (²¹⁰Pb, ²³⁴Th), organic geochemical assessments, and redox metal concentrations were determined to relate changes in sediment accumulation rate, contamination, and redox conditions with benthic foraminiferal density. Cores collected in December 2010 indicated a decline in density (80-93%). This decline was characterized by a decrease in benthic foraminiferal density and benthic foraminiferal accumulation rate (BFAR) …