The original compilation of this data is in Rau (2004) (https://www.dnr.wa.gov/Publications/ger_dr4_pacific_nw_foram_collections.zip), where most samples are located by Township, Range, and Section relative to the Public Land Survey System. For this database, Snavely's original field sheets and notebooks were used to calculate latitude and longitude of the samples and the results were combined with Rau (2004) to produce a geodatabase in ArcGIS. Latitude and longitude are reported in the North American Datum of 1927, however the point feature class has been reprojected to the North American Datum of 1983 UTM zone 10N. The database includes information on 3,418 foraminiferal samples mostly gathered from outcrops during field work for geologic mapping, although there are also samples from exploration wells (both onshore and offshore) and some auger holes. Because this is a legacy database that was created from historic field sheets and field notes, it contains data gaps labeled as null values, including a few samples with no location data, which are included for completeness. Unlocated samples do not have a latitude and longitude because the location on a field sheet could not be determined.