TY - BOOK ID - 135145978 TI - The Phosphoria, Park City and Shedhorn formations in the western phosphate field AU - McKelvey, V. E. AU - Geological Survey (U.S.) AU - Interior Missouri Basin Field Committee AU - U.S. Atomic Energy Commission PY - 1959 PB - Washington : United States Department of the Interior, Geological Survey, DB - UniCat KW - Geology, Stratigraphic KW - Phosphates KW - Formations (Geology) KW - From 230 to 280 million years ago KW - Phosphoria Formation. KW - Idaho. KW - Montana. KW - Utah. KW - Wyoming. UR - https://www.unicat.be/uniCat?func=search&query=sysid:135145978 AB - ER -