 | | Book (edition) | | sometimes red tinges, cobalt shows pink shades, while iron displays pronounced tones of red, brown, and occasionally...pore-fillings of gold (yellow). Right: Finely laminated iron oolith with a relatively coarse core of oolite fragment...form from magnetic precursors, such as greigite (iron-thiospinel; Fe3S4) which, during mild pore water...orange-red to yellow-grey to turquoise to greenish 31 Nsutite Selenium, native yes Stromeyerite Stannoidite...bluish isotropic Wairauite yes Pararammelsbergite Iron, native Rammelsbergite pure white; 56.8 weak, yellow |  | | Book | | Koski, and Hsueh-Wen Yeh 10 Iron Ores Derived by Enrichment of Banded Iron Formation R. C. Morris 11...evident in several chapters in this volume. Banded iron formation, the theme of R. C. Morris in this volume...sedimentary siliceous deposits, including petroleum, iron, manganese, barite, phosphorite, uranium, and diatomite...common, however, in Paleozoic siliceous sections. Iron ore is present in Paleozoic but dominant in Precambrian...relates directly to the origin of the associated iron ores, also commonly thought to have been precipitated |
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