Robuta

https://www.usgs.gov/publications/regional-analysis-spiculite-faunas-permian-phosphoria-basin-implications Regional analysis of spiculite faunas in the permian phosphoria basin: Implications for... The sponge spiculites of the Permian Phosphoria basin, Antler high, and eastern Havallah basin were the southernmost expression of one of the largest spiculite... regional analysisin the https://www.usgs.gov/publications/upwelling-model-phosphoria-sea-a-permian-ocean-margin-sea-northwest-united-states An upwelling model for the Phosphoria sea: A Permian, ocean-margin sea in the northwest United... The Permian Phosphoria Formation, a petroleum source rock and world-class phosphate deposit, was deposited in an epicratonic successor basin on the western... https://www.usgs.gov/publications/geological-setting-oil-shales-permian-phosphoria-formation-and-some-geochemistry-these Geological setting of oil shales in the Permian phosphoria formation and some of the geochemistry... Recent studies of the Meade Peak and the Retort Phosphatic Shale Members of the Phosphoria Formation have investigated the organic carbon content and some... https://www.usgs.gov/publications/buddingtonite-ammonium-feldspar-phosphoria-formation-southeastern-idaho Buddingtonite, ammonium feldspar, in the Phosphoria Formation, southeastern Idaho | U.S. Geological... Buddingtonite is distributed widely in the rocks of the Meade Peak Member of the Phosphoria Formation in southeastern Idaho and occurs in amounts up to about... in the