CONTENTS. 
xxiii 
Page. 
Chapter XIX. — concluded. 
The Sandur deposits 
Limitation of the term ' lateritoid ' . 
Distribution of manganiferous laterite and of 
lateritoid ...... 
Structure and working of the lateritic manga 
nese-ore deposits .... 
Mineral composition of the lateritic ores 
Pisolitic (aluminous) manganese-ores 
Chemical composition of the lateritic ores . 
Chapter XX.— Manganese in the Tertiary and Recent Forma 
tions. 
Lateritic Gravel (Manganese-ore Pisolites) 
Manganese-ore pisolites . 
Detrital pisolites 
Concretionary pisolites 
Modes of occurrence 
Origin of the detrital pisolites 
Origin of the concretionary pisolites . 
Sections at Mansar and Beldongri 
Summary of origin .... 
Manganese in the Tertiary .... 
Manganese in the Siwaliks 
Manganese in the Fossil-wood Group. 
Manganese in the Post-Tertiary 
Recent Deposits of Manganese 
General ...... 
Deposits in ponds and rivers, etc. 
Psilomelane deposited at a waterfall on th 
» • » Pench ..... 
Manganese oxide deposited in a pond near 
Rambha 
Pyrolusite at Pan Kuan 
Dendrites of manganese oxides 
Manganese oxides in Pleistocene mammalian 
remains at Allahabad 
, Manganese-oxide stains in asbestos from 
Tumkhera Khurd . . . 
Deep-sea Deposits ..... 
Summary of oiigin of deep-sea nodules 
Deep-sea nodules from the Maldive Islands 
Manganiferous Sands and Soils 
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398 
403 
403 
404 
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