World geology compiled by the Geological Survey of Canada at approximately 1:35,000,000 scale, published there as Open File Report 5529.
This dataset is not a product of USGS, but comes from the Geological Survey of Canada. Natural Resources Canada provides these data in GIS formats, including shapefile format, through the link to the publication below. The ZIP package is 550M bytes as of 2022.
On this page a link labeled Downloads opens a second page which provides a link to the ZIP package containing these data in GIS formats.