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Geology 103 Sedimentology and Stratigraphy Tim Horner Geology Department, CSU Sacramento

Explore the formation processes of chert and ironstone, including the role of silica sources and iron-bearing minerals. Study microquartz, chalcedony, opal, jasper, diatoms, and banded iron formation.

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Geology 103 Sedimentology and Stratigraphy Tim Horner Geology Department, CSU Sacramento

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  1. SACRAMENTO STATE Geology 103Sedimentology and StratigraphyTim HornerGeology Department, CSU Sacramento Lecture #11: Chert and Ironstone Reading assignment: Boggs, 5th ed., pp. 175-194

  2. Microquartz, megaquartz, chalcedony- thin sections From Boggs, Principles of Sedimentology and Stratigraphy, 5th ed., p. 207

  3. Opal- amorphous, irridescent

  4. Jasper, flint, porcelanite

  5. Bedded chert, nodular chert

  6. Diatoms in deep sea sediment From Boggs, Principles of Sedimentology and Stratigraphy, 5th ed., p. 209

  7. Nodular chert From Boggs, Principles of Sedimentology and Stratigraphy, 5th ed., p. 210

  8. Sources of silica in marine water From Boggs, Principles of Sedimentology and Stratigraphy, 5th ed., p. 222

  9. Pathways of silica transformation after deposition From Boggs, Principles of Sedimentology and Stratigraphy, 5th ed., p. 214

  10. Silica stability vs. pH and temp. From Boggs, Principles of Sedimentology and Stratigraphy, 5th ed., p. 214

  11. Principal iron-bearing minerals From Boggs, Principles of Sedimentology and Stratigraphy, 5th ed., p. 219

  12. Banded iron formation (BIF)

  13. Geochemical stability of iron-rich minerals From Boggs, Principles of Sedimentology and Stratigraphy, 5th ed., p. 222

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