1. SACRAMENTO
STATE
Geology 103 Sedimentology and Stratigraphy Tim Horner Geology Department, CSU Sacramento
Lecture #11:
Chert and Ironstone
Reading assignment:
Boggs, 5th ed., pp

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