1. Introduction 5
2. Regional Setting 6
3. Methods 9
4. Morphology of the Seafloor 10
5. Sedimentary Framework of Phosphorite Nodules and the Modern Environment 11
6. Distribution of Phosphorite 13
6.1. Regional Distribution of Phosphorite 13
6.2. Frequency Distribution of Phosphorite Concentrations 18
6.3. Grain-size Distribution of Phosphorite Nodules 20
6.4. Estimation of Phosphorite Reserves 21
7. Composition of Phosphorite Nodules 26
8. Conclusions 33
9. References 34