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The Lower Jurassic Huciska Limestone Formation (lower Sub-Tatric nappe) in the Western Tatra Mountains locally hosts lens-like bodies of Mn-ore deposit (the Banie Ore Bed). The ore is composed of crinoidal sediment containing both Mn-oxides (bixbyite, hausmannite, todorokite, birnessite) and Mn-carbonates (manganic calcite, kutnahorite, calcic rhodochrosite, rhodochrosite). This composition reflects...
Fossiliferous phosphate nodules in the condensed Brentskardhaugen Bed (Toarcian-Bathonian) in Spitsbergen show common collapse and injection microstructures associated with stages of phosphatization of biogenic carbonate skeletal remains. These structures provide supporting evidence for the nature of early phosphate replacement of biogenic carbonate in clastic condensed environment of the Jurassic...
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