Version history for Composite multibeam bathymetry surface and data sources of the southern Cascadia Margin offshore Oregon and northern California (formerly cited as) Dartnell, P., Conrad, J.E., Watt, J.T., Hill, J.C., 2021, Composite multibeam bathymetry surface and data sources of the southern Cascadia Margin offshore Oregon and northern California, U.S. Geological Survey data release, https://doi.org/10.5066/P9C5DBMR. (now cited as) Dartnell, P., Rudebusch, J.A., Conrad, J.E., Watt, J.T., Hill, J.C., 2021, Composite multibeam bathymetry surface and data sources of the southern Cascadia Margin offshore Oregon and northern California (ver. 2.0, April 2026), U.S. Geological Survey data release, https://doi.org/10.5066/P9C5DBMR. ________________________________________________________ Version 1.0 posted online August 20, 2021 ________________________________________________________ Version 2.0 revised and posted online April 2026. Changes made in version 2.0: Data were revised to include eight additional bathymetric data sources: EX2208, EX2301, EX2307, H13549, H13691, NA130, AT42-16, and MGL2211. Datasets were cleaned and processed into 30-m cell resolution grids that were mosaicked into the version 1.0 composite multibeam bathymetry surface dataset. The polygon shapefile of data sources was revised to add the new data sources. Citation was updated to include Rudebusch, J.A. as an originator.