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Digital Atlas of Idaho
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2002-03-21
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Generalized Stratigraphic Section of the Gay Mine Phosphoria Formation Dinwoody Formation 575- Interbedded limestone, sandstone and shale Cherty Shale Member 225- Meade Peak Member Upper sillstone unit 200 "hanging wall" phosphorite siltstone (furnace grade rock) phosphatic mudstone (sub ore) 175- siltstone phosphatic mudstone (sub ore) "buckshot" phosphorite (furnace grade rock) 150 middle siltstone unit phosphatic mudstone (sub ore) 125- dolomite phosphatic shale phosphatic mudstone (sub ore) -PHOSPHORIA FORMATION false cap limestone unit, dolomite phosphalic shale 100- dolomite phosphatic shale cap rock limestone unit, dolomite main bed phosphorite unit 75 footwall siltstone phosphorite bed Park City Formation Grandeur Member 50- limestone 25- Wells Formation sandy limestone feet 0- M.A.G. '90