In accordance with SO #3423 - The Gulf of America and SO #3424 - Mount McKinley and Landmarks Honoring the Alaskan People, new USGS data releases specific to those named places will utilize the new name Gulf of America and the restored name Mount McKinley. Per USGS practice, historical data will retain the name of the geographic features as they were known at the time the data were originally released.
Data Release
Archive of Chirp Subbottom Profile Data Collected in 2017 From the Louisiana Chenier Plain
By Arnell S. Forde, Jake J. Fredericks, and James G. Flocks
USGS, St. Petersburg, Florida
Summary
Scientists from the U.S. Geological Survey (USGS) St. Petersburg Coastal and Marine Science Center conducted nearshore geophysical surveys around the eastern and western Chenier Plain, Louisiana, in 2017. Data were collected under the Barrier Island Coastal Monitoring (BICM) program, an ongoing collaboration between the State of Louisiana Coastal Protection and Restoration Authority (CPRA), the University of New Orleans (UNO) Pontchartrain Institute for Environmental Sciences (PIES), and the USGS. The objective of this study was to document the changing morphology of the coastal environment by compiling historical shoreline bathymetric datasets and comparing them to bathymetric data collected during the BICM project. At the same time, subsurface geophysical data were collected to investigate the geomorphology and geologic controls on barrier-shoreline evolution. Collecting geophysical data can help researchers to identify relationships between the geologic history of the barrier shoreline and its present-day morphology and sediment distribution.
This data release serves as an archive of subbottom profile and navigation data acquired offshore of the Chenier Plain, during USGS Field Activity Numbers 2017-323-FA (Project ID: 17BIM01, June 2–10) and 2017-324-FA (17BIM05, July 2). Data products, including unprocessed digital chirp subbottom data, trackline map, navigation files, processed profile images, geographic information system (GIS) files and formal Federal Geographic Data Committee (FGDC) metadata, and field logs are provided.
Data
| File Name and Description | Metadata (XML format) | Metadata (text format) | Download File |
|---|---|---|---|
| 2017_Chenier_segy.zip Unprocessed digital chirp subbottom trace data (.sgy) |
2017_Chenier_metadata.xml | 2017_Chenier_metadata.txt | 2017_Chenier_segy.zip (4.84 GB) |
| 2017_Chenier_seisimag.zip Processed subbottom profile images (.gif) |
Same as above | Same as above | 2017_Chenier_seisimag.zip (63.4 MB) |
| 2017_Chenier_nav.zip Navigation data (.txt) |
Same as above | Same as above | 2017_Chenier_nav.zip (8.1 MB) |
| 2017_Chenier_arc.zip Survey trackline locations (.mxd, .kml, .shp) |
Same as above | Same as above | 2017_Chenier_arc.zip (66.8 MB) |
| Supplemental information | |||
| 2017_Chenier_logs.zip Field Activity Collection System (FACS), acquisition geometry and geophysical operations logs (.docx, .xlsx) |
Not applicable | Not applicable | 2017_Chenier_logs.zip (200 KB) |
Figure 1. Regional map showing the 2017 Louisiana Chenier Plain survey area (indicated by red box) and seismic trackline locations.
Suggested Citation
Forde, A.S., Fredericks, J.J., and Flocks, J.G., 2019, Archive of chirp subbottom profile data collected in 2017 from the Louisiana Chenier Plain: U.S. Geological Survey data release, https://doi.org/10.5066/P9XOZIBV.