Sediment Data From Surface Samples and Sand Augers Collected in 2023 From the Northern Chandeleur Islands, Louisiana

In 2023, scientists from the U.S. Geological Survey St. Petersburg Coastal and Marine Science Center (USGS SPCMSC) conducted a sediment sampling survey at the northern Chandeleur Islands, Louisiana. Funded by the Extending Government Funding and Delivering Emergency Assistance Act (Public Law 117-43) enacted on September 30, 2021, these data complement sediment data from samples previously collected from the Chandeleur Islands in 2007, 2008, 2012, 2013, and 2015.

This data release serves as an archive of sedimentologic data from surface samples and sand-auger cores collected from terrestrial and submerged barrier environments at the northern Chandeleur Islands, Louisiana from March 24-31, 2023 (USGS Field Activity Number [FAN] 2023-307-FA). Grain-size data from surface samples are provided to characterize the surficial sediment texture of back-barrier, island, and shoreface environments. Sedimentologic data from sand augers, including descriptive core logs and grain-size data, are provided to characterize the shallow subsurface stratigraphy at selected sites. Data acquisition and processing methods follow procedures described in Bernier and others (2014, 2023).

Bernier, J.C., Everhart, C.S., Ciarletta, D.C., Miselis, J.L., and DeWitt, N.T., 2023, Sediment data from vibracores and sand augers collected in 2021 and 2022 from Fire Island, New York: U.S. Geological Survey data release, https://doi.org/10.5066/P91P1T88.

Bernier, J.C., Kelso, K.W., Buster, N.A., Flocks, J.G., Miselis, J.L., and DeWitt, N.T., 2014, Sediment data collected in 2012 from the northern Chandeleur Islands, Louisiana: U.S. Geological Survey Data Series 850, https://doi.org/10.3133/ds850.