Table of Contents - SPE285: Tonsteins: Altered Volcanic Ash Layers in Coal-Bearing Sequences

Abstract

Nomenclature and Classification

Geographical Occurrence of Tonsteins

Volcanic Characteristics of Tonsteins

Methods of Study

Mineralogy

Gross Texture of Tonsteins

Alteration of Volcanic Ash to Tonstein

Environmental Effects of Thick Ash Falls

Stratigraphic Uses of Tonsteins

Summary and Conclusions

Acknowledgments

References Cited