https://www.usgs.gov/publications/biostratigraphy-san-joaquin-formation-borrow-source-area-b-17-kettleman-hills-landfill
The stratigraphic occurrences and interpreted biostratigraphy of invertebrate fossil taxa in the upper San Joaquin Formation and lower-most Tulare Formation...
san joaquin formationbiostratigraphyborrowsourcearea