Processed sub-bottom envelope data (SEG-Y format) acquired offshore Galveston, Texas, during the 2021 TrinSab Survey

This data set presents processed sub-bottom envelope data files in SEG-Y format that were collected using an Edgetech 216 (2-16 kHz) chirp towfish. The University of Texas Institute for Geophysics (UTIG) conducted a reconnaissance survey ("TrinSab") in April of 2021, aboard R/V Tommy Munro, to explore the stratigraphy of the outer Trinity River Paleovalley and its confluence with the Sabine River Paleovalley, with the broad goals of investigating the setting for the potential for sand resources, and for understanding the history of sedimentary deposition in this coastal/estuarine/marine setting in response to sea level rise in the Holocene. Processing included applying a heave filter, trace equalization and layback correction. These processed envelope files are stored in the SEG-Y file format. Study collaboration and funding were provided by the U.S. Department of the Interior, Bureau of Ocean Energy Management, New Orleans, LA under Agreement Number M16AC00020.